bluuebunny/crossref_metadata_2025 huggingface dataset:
Ethnic differences in inter‐ and intra‐situational blood pressure variation: Comparisons among African‐American, Hispanic‐American, Asian‐American, and European‐American women
Authors: James Gary D. , Bovbjerg Dana H. , Hill Leah A.
Published: May 2016

Objectives

The purpose of this study was to compare the daily inter‐ and intra‐situational ambulatory blood pressure (BP) variation by ethnicity in women.

Methods

The African‐American (N = 82; Age = 39.7 + 8.9), Hispanic‐American (N = 25; age = 37.5 + 9.4), Asian‐American (N = 22; Age = 35.2 + 8.6), and European‐American (N = 122; Age = 37.2+ 9.4) women in this study all worked in similar positions at two major medical centers in NYC. Each wore an ambulatory monitor during the course of one mid‐week workday. Proportional BP changes from work or home to sleep, intra‐situational BP variation (standard deviation [SD]) and mean situational BP levels were compared among the groups using ANOVA models.

Results

African‐American and Asian‐American women had significantly smaller proportional work‐sleep systolic changes than either European‐ (P < 0.05) or Hispanic‐American (P < 0.05) women, but the Asian‐American women's changes tended to be smallest. The variability (SD) of diastolic BP at work was significantly greater among African‐ and Hispanic‐American women compared to Asian‐ and European‐American women (all P < 0.05). African‐American women had greater sleep variability than European‐American women (P < 0.05). Asian‐American women had the highest level of sleep diastolic pressure (all comparisons P < 0.05).

Conclusions

African‐American and Asian‐American women have an attenuated proportional BP decline from waking environments to sleep compared to European‐American and Hispanic‐American women. Asian‐American nocturnal BP may be elevated relative to all other groups. Am. J. Hum. Biol. 28:932–935, 2016. © 2016Wiley Periodicals, Inc.
Reliability of a decision‐tree model in predicting occupational lead poisoning in a group of highly exposed workers
Authors: Stoia Mihaela , Kurtanjek Zelimir , Oancea Simona
Published: May 2016

Objective

This study aimed to provide the toxicological profile of some lead‐exposed workers and obtain a predictive model for lead poisoning.

Methods

Data regarding external and absorbed exposure were collected from 585 subjects employed in ten metallurgical production departments. Airborne lead concentration, blood lead level (BLL), cumulative blood lead index (CBLI), urine delta‐aminolevulinic acid (DALA), age, workplace/section, exposure period, and whether reported lead poisoning as occupational disease were examined using ANOVA, and, post‐ANOVA, Pearson correlation matrix, PCA (principal component analysis), decision‐tree modeling, and logistic modeling.

Results

BLL was less sensitive than CBLI in predicting poisoning. Decision‐tree modeling highlighted the importance of CBLI ≥1,041 µg.years/dl and air lead concentration ≥0.3 mg/m3 in the occurrence of occupational poisoning. Age ≥48 years and DALA ≥19.3 mg/L were also factors.

Conclusions

Workers were at risk of poisoning as a result of their long term unacceptable exposure. Decision‐tree modeling is potentially useful for risk management. Am. J. Ind. Med. 59:575–582, 2016. © 2016 Wiley Periodicals, Inc.
Rhodium‐Catalyzed Geminal Oxyfluorination and Oxytrifluoro‐Methylation of Diazocarbonyl Compounds
Authors: Yuan Weiming , Eriksson Lars , Szabó Kálmán J.
Published: May 2016

A new reaction for the rhodium‐catalyzed geminal‐difunctionalization‐based fluorination is presented. The substrates are aromatic and aliphatic diazocarbonyl compounds. As the fluorine source a stable and easily accessible benziodoxole reagent was used. A variety of alcohol, phenol, and carboxylic acid reagents were employed to introduce the second functionality. The reaction was extended to trifluoromethylation using a benziodoxolon reagent. The fluorination and trifluoromethylation reactions probably proceed by a rhodium‐containing onium ylide type intermediate, which is trapped by either the F or CF3 electrophiles.
Cationic Poly(p‐phenylene vinylene) Materials as a Multifunctional Platform for Light‐Enhanced siRNA Delivery
Authors: Li Shengliang , Yuan Huanxiang , Chen Hui , Wang Xiaoyu , Zhang Pengbo , Lv Fengting , Liu Libing , Wang Shu
Published: May 2016

In this work, a multifunctional platform based on the versatile function of cationic poly(p‐phenylene vinylene) (PPV) derivative has been developed for white light‐enhanced siRNA delivery in a remote control manner. Conjugated polyelectrolyte PPV, which possesses cationic and amphipathic features, can effectively self‐assemble with siRNA and deliver siRNA into living cells. More importantly, PPV can sensitize surrounding oxygen into reactive oxygen species (ROS) upon exposure to white light and disrupt the endosomal membrane, and the resulting enhanced endosomal escape increases the gene silencing ability of siRNA. Besides, due to high fluorescent emission, PPV can also be used to image the siRNA delivery and intracelluar location. Therefore, by taking full advantage of PPV, this strategy provides a new enhanced siRNA delivery in a non‐invasive and spatiotemporal photochemical manner.
Hybrid Corannulene–Perylene Dyes: Facile Synthesis and Optoelectronic Properties
Authors: Lin Zhi , Li Cheng , Meng Dong , Li Yan , Wang Zhaohui
Published: May 2016

Considering the peculiar topology of corannulene and extraordinary optoelectronic properties of perylene dyes, a series of hybrid corannulene–perylene dyes, namely corannulene‐fused perylene‐3,4‐dicarboxylic acid monoimide (PMI) and corannulene‐fused perylene‐3,4,9,10‐tetracarboxylic acid diimides (PDIs), were efficiently synthesized by a Suzuki coupling (carbon–carbon bond formation) and subsequent oxidative cyclization and photocyclization, respectively. Single crystal packing demonstrates that the solid state of the corannulene‐fused PMI is arranged in back to back antiparallel dimers due to the strong dipole–dipole interactions. Integration of the corannulene unit to the perylene dyes along peri‐positions makes the absorption bathochromically‐shifted together with a much higher molar extinction coefficient, whereas integration of the corannulene unit to the perylene dyes along bay‐positions has a much broader absorption. Strong and broad absorption properties, strong electron‐accepting ability, and suitable LUMO levels close to that of [6,6]‐phenyl‐C61‐butyric acid methyl ester (PCBM) make hybrid corannulene–perylene dyes promising electron‐acceptor materials for organic optoelectronic devices.
Vestibulo‐ocular reflex function in children with high‐functioning autism spectrum disorders
Authors: Carson Tana B. , Wilkes Bradley J. , Patel Kunal , Pineda Jill L. , Ko Ji H. , Newell Karl M. , Bodfish James W. , Schubert Michael C. , Radonovich Krestin , White Keith D. , Lewis Mark H.
Published: May 2016

Sensorimotor processing alterations are a growing focus in the assessment and treatment of Autism Spectrum Disorders (ASD). The rotational vestibulo‐ocular reflex (rVOR), which functions to maintain stable vision during head movements, is a sensorimotor system that may be useful in understanding such alterations and their underlying neurobiology. In this study, we assessed post‐rotary nystagmus elicited by continuous whole body rotation among children with high‐functioning ASD and typically developing children. Children with ASD exhibited increased rVOR gain, the ratio of eye velocity to head velocity, indicating a possible lack of cerebellar inhibitory input to brainstem vestibular nuclei in this population. The ASD group also showed less regular or periodic horizontal eye movements as indexed by greater variance accounted for by multiple higher frequency bandwidths as well as greater entropy scores compared to typically developing children. The decreased regularity or dysrhythmia in the temporal structure of nystagmus beats in children with ASD may be due to alterations in cerebellum and brainstem circuitry. These findings could potentially serve as a model to better understand the functional effects of differences in these brain structures in ASD. Autism Res 2017, 10: 251–266. © 2016 International Society for Autism Research, Wiley Periodicals, Inc.
A sexually dichotomous, autistic‐like phenotype is induced by Group B Streptococcus maternofetal immune activation
Authors: Allard Marie‐Julie , Bergeron Julie D. , Baharnoori Moogeh , Srivastava Lalit K. , Fortier Louis‐Charles , Poyart Claire , Sébire Guillaume
Published: May 2016

Group B Streptococcus (GBS) is a commensal bacterium present in the lower genital tract of 15–30% of healthy pregnant women. GBS is the leading cause of chorioamnionitis and cerebral injuries in newborns, occurring most often in the absence of maternofetal pathogen translocation. Despite GBS being the most frequent bacterium colonizing pregnant women, no preclinical studies have investigated the impact of end‐gestational maternal GBS exposure on the offspring's brain development and its behavioral correlates. Our hypothesis is that GBS‐induced gestational infection/inflammation has a deleterious neurodevelopmental impact on uninfected offspring. Our goal was to study the impact of maternal GBS infection on the placental and neurodevelopmental features in the offspring using a new preclinical rat model. GBS‐exposed placentas exhibited chorioamnionitis characterized by the presence of Gram‐positive cocci and polymorphonuclear cells, with the latter being significantly more prominent in the labyrinth of male offspring. GBS‐exposed male offspring had reduced thickness of periventricular white matter. In addition, they exhibited autistic‐like behaviors, such as abnormal social interaction and communication, impaired processing of sensory information and hyperactivity. Overall, these data show for the first time that gestational exposure to GBS plays an important role in the generation of neurodevelopmental abnormalities reminiscent of human autism spectrum disorders (ASD). These results provide new evidence in favor of the role of a common and modifiable infectious/inflammatory environmental factor in human ASD pathophysiology. Autism Res 2017, 10: 233–245. © 2016 International Society for Autism Research, Wiley Periodicals, Inc.
Gene cloning, expression, and characterization of a novel β‐mannanase from the endophyte Paenibacillus sp. CH‐3
Authors: Zhang Jian‐Xin , Chen Ze‐Tian , Meng Xiao‐Lin , Mu Guang‐Ya , Hu Wen‐Bo , Zhao Jie , Nie Guo‐Xing
Published: May 2016

An endophyte with high yield of β‐mannanase, designated as Paenibacillus sp. CH‐3, was isolated from black locust (Robinia pseudoacacia) seeds. The β‐mannanase gene (manB) has been cloned, expressed, purified, and characterized. With an open reading frame of 984 bp, the manB gene encodes 327 amino acid residues, which belongs to GH family 5. The recombinant β‐mannanase (ManB) has an apparent molecular weight of 50.4 kDa with an optimal activity level at pH 7.0 and 45 °C, and it is stable in the range of pH 4–9. By optimizing, the temperature, isopropyl β‐d‐thiogalactoside concentration, and induction time were 28 °C, 0.05 mM, and 12 H, respectively. The highest activity reached at 1,054.17 U/mL. In addition, ManB had Km values of 7.30, 8.69, and 27.17 mg/mL for locust bean gum (LBG), guar gum, and konjac glucomannan (KGM), respectively. Its catalytic efficiency (kcat/Km) was 176.31 mL/(mg·Sec) for LBG, 116.69 mL/(mg·Sec) for guar gum, and 115.49 mL/(mg·Sec) for KGM. The products of glucomannans, which were hydrolyzed by ManB, mainly contain mannobiose, mannotetrose, and a higher manno‐oligosaccharide. The characteristics of ManB revealed that it could be exploited as an effective additive in the animal feed industry.
Rapid on‐site detection of airborne asbestos fibers and potentially hazardous nanomaterials using fluorescence microscopy‐based biosensing
Authors: Kuroda Akio , Alexandrov Maxym , Nishimura Tomoki , Ishida Takenori
Published: May 2016

A large number of peptides with binding affinity to various inorganic materials have been identified and used as linkers, catalysts, and building blocks in nanotechnology and nanobiotechnology. However, there have been few applications of material‐binding peptides in the fluorescence microscopy‐based biosensing (FM method) of environmental pollutants. A notable exception is the application of the FM method for the detection of asbestos, a dangerous industrial toxin that is still widely used in many developing countries. This review details the selection and isolation of asbestos‐binding proteins and peptides with sufficient specificity to distinguish asbestos from a large variety of safer fibrous materials used as asbestos substitutes. High sensitivity to nanoscale asbestos fibers (30–35 nm in diameter) invisible under conventional phase contrast microscopy can be achieved. The FM method is the basis for developing an automated system for asbestos biosensing that can be used for on‐site testing with a portable fluorescence microscope. In the future, the FM method could also become a useful tool for detecting other potentially hazardous nanomaterials in the environment.
Fluorescent 2‐Aminopyridine Nucleobases for Triplex‐Forming Peptide Nucleic Acids
Authors: Cheruiyot Samwel K. , Rozners Eriks
Published: May 2016

Development of new fluorescent peptide nucleic acids (PNAs) is important for fundamental research and practical applications. The goal of this study was the design of fluorogenic nucleobases for incorporation in triplex‐forming PNAs. The underlying design principle was the use of a protonation event that accompanied binding of a 2‐aminopyridine (M) nucleobase to a G‐C base pair as an on switch for a fluorescence signal. Two fluorogenic nucleobases, 3‐(1‐phenylethynyl)‐M and phenylpyrrolo‐M, were designed, synthesized and studied. The new M derivatives provided modest enhancement of fluorescence upon protonation but showed reduced RNA binding affinity and quenching of fluorescence signal upon triple‐helix formation with cognate double‐stranded RNA. Our study illustrates the principal challenges of design and provides guidelines for future improvement of fluorogenic PNA nucleobases. The 3‐(1‐phenylethynyl)‐M may be used as a fluorescent nucleobase to study PNA–RNA triple‐helix formation.
Novel Approach for the Characterization of Lewis Acidic Solid Catalysts by Solid‐State NMR Spectroscopy
Authors: Lang Swen , Benz Michael , Obenaus Utz , Himmelmann Robin , Hunger Michael
Published: May 2016

Acetone‐2‐13C, trimethylphosphine oxide (TMPO), and ammonia were applied as probe molecules for solid‐state NMR investigations of Lewis acid sites on γ‐Al2O3, TiO2/anatase, and lithium‐exchanged zeolite Na‐Y. An indication for Lewis acid sites are the 31P MAS NMR signals at 48–51 ppm for TMPO‐loaded catalysts. The determination of the Lewis site density through the evaluation of these 31P MAS NMR signals, however, is difficult owing to the demanding TMPO adsorption procedure. Upon ammonia adsorption, the formation of ammonium ions at Brønsted acid sites and the coordination of ammonia at Lewis acid sites cause 1H MAS NMR signals at 6–7 ppm and −0.5–3 ppm, respectively. The integration of these signals results in the densities of Brønsted and Lewis acid sites. Future studies have to clarify whether the different 1H chemical shifts in the range of −0.5–3 ppm for ammonia coordinated at Lewis acid sites on solid catalysts are a hint at the different strengths of these surface sites.
ChemInform Abstract: Direct Detection of Aluminosilicate Species in Aqueous Solution by Silicon‐29 and Aluminum‐27 NMR Spectroscopy.
Authors: KINRADE S. D. , SWADDLE T. W.
Published: May 2016

The NMR results obtained for 1 M SiO2/0.07 M Al/2.4 M NaOH solutions indicate that the major aluminosilicate species in solution are Al‐substituted derivatives of the silicate dimer, cyclic trimer, cyclic tetramer, and acyclic trimer.
ChemInform Abstract: NMR Study of Acid‐Base Equilibria and Other Reactions of Ammineplatinum Complexes with Aqua and Hydroxo Ligands.
Authors: APPLETON T. G. , HALL J. R. , RALPH S. F. , THOMPSON C. S. M.
Published: May 2016

The equilibria outlined in the scheme are studied by 15N and 195Pt NMR; pH dependences and pKa values are reported.
ChemInform Abstract: Synthesis of Hydrated Zinc‐Magnesium Monophosphates.
Authors: RUDYI I. V. , SHCHEGROV L. N. , ANTRAPTSEVA N. M.
Published: May 2016

The exact conditions necessary for the preparation of pure samples of the title double phosphates are investigated.
ChemInform Abstract: Formation, Structures, and Reactions of Selected α′‐Lithioallylamides.
Authors: BEAK P. , LEE B.
Published: May 2016

Lithiation of the allylamide (I) followed by addition reaction with the electrophiles (II) usually forms the Z‐isomers (III) as the main products.
ChemInform Abstract: Intramolecular Diels‐Alder Reaction of α,β‐Unsaturated Ester Dienophiles with Cyclopentadiene and the Dependence on Tether Length.
Authors: STILLE J. R. , GRUBBS R. H.
Published: May 2016

Reduction of the butyrolactone (I) yields the lactol (II) which is coupled with (III) to give the tetrahydrofuranylacetate (IV).
ChemInform Abstract: Nitrilimine and Nitrile Oxide 1,3‐Dipolar Cycloaddition of Norbornane‐and Norbornene‐Fused Dihydro‐1,3‐oxazines.
Authors: STAJER G. , SZABO A. E. , BERNATH G. , SOHAR P.
Published: May 2016

The fused dihydro‐1,3‐oxazines (I), (IV), (VI), (X), and (XII) are subjected to 1,3‐dipolar cycloaddition reaction with benzonitrile oxide or diphenylnitrilimine, both generated in situ, yielding various tetracyclic products as shown in the reaction scheme.
ChemInform Abstract: Reaction of Phosphorus Pentachloride with Perhalocarbonyl‐Containing Compounds.
Authors: CHEN L. S. , CHEN G. J.
Published: May 2016

The polyfluorinated ketones (III) or diketones (VI), prepared by coupling the esters (II) or diesters (V) with the perfluoroalkyl iodides (I) or (IV) in the presence of methyllithium, are heated with phosphorus pentachloride to form the chlorinated products (VII) ‐ (IX).
ChemInform Abstract: Effect of Substituent on Reactions Remote from Silicon: Regioselective α‐Alkylation of α‐Silylallyl Carbanions.
Authors: HORVATH R. F. , CHAN T. H.
Published: May 2016

Lithiation of the allylsilanes (I) generates the corresponding anions which react with the electrophiles (II) or (V) to form substituted allylsilanes.
ChemInform Abstract: Alkenylfluorosilanes as Widely Applicable Substrates for the Palladium‐Catalyzed Coupling of Alkenylsilane/F‐ Reagents with Alkenyl Iodides.
Authors: HATANAKA Y. , HIYAMA T.
Published: May 2016

The coupling reaction of the alkenylfluorosilanes (I), (IV), and (VII) with the alkenyl iodides (II) or (V), yielding the conjugated E,E‐(III), Z,Z‐ (VI), and E,Z‐dienes (VIII) stereospecifically, is mediated by fluoride ions and palladium catalysts.
ChemInform Abstract: Catalytic Formation of α‐Keto Acids by Artifical CO2 Fixation.
Authors: TANAKA K. , MATSUI T. , TANAKA T.
Published: May 2016

Electrochemical reduction of CO2 (II) under controlled potential electrolysis in solutions of (I) catalyzed by the FeMoS cluster produces the α‐keto acids (III).
ChemInform Abstract: (R,R)‐O,O′‐(2,2‐Dichlorovinyl)tartaric Acid: An Easily Synthesized Optically Pure Vinyl Ether. A New Synthesis of (R,R)‐O,O′‐Diethyltartaric Acid.
Authors: URAY G. , LINDNER W. , REITER F.
Published: May 2016

The acetal (I), derived from chloral and (R,R)‐tartaric acid, is reduced to yield the bisdichlorovinyl tartaric acid (II) which is converted to the esters (V), (Xb), and the amide (Xa) by known methods.
ChemInform Abstract: Reactions of Carboxylic Acids with “Phosphonium Anhydrides”.
Authors: HENDRICKSON J. B. , HUSSOIN M. S.
Published: May 2016

Carboxylic acids such as (I) are dehydrated under the action of so‐called phosphonium anhydrides, generated in situ from triphenylphosphine oxide and triflic anhydride, to give the corresponding acid anhydrides such as (II).
ChemInform Abstract: Cycloaddition of the Anion Derived from Homophthalic Anhydride to cis,cisoid,cis‐Tricyclo(6.3.0.02,6)undeca‐4,9‐diene‐3,11‐dione. Aromatization as a Driving Force for Intramolecular Sigmatropic Hydrogen Transfer.
Authors: MARCHAND A. P. , ANNAPURNA P. , WATSON W. H. , NAGL A.
Published: May 2016

The (4 + 2)cycloaddition reaction of the salt (III), derived from homophthalic anhydride (I), with the unsaturated tricyclic diketone (IV) yields the naphthol (V) via decarboxylation and subsequent intramolecular hydrogen migration.
ChemInform Abstract: Synthesis of New Thieno(3,4‐c)thiophene Derivatives Having Formyl Substituents.
Authors: TSUBOUCHI A. , MATSUMURA N. , INOUE H. , HAMASAKI N. , YONEDA S. , YANAGI K.
Published: May 2016

The known thienothiophene (I) reacts with Vilsmeier's reagent to give the aldehydes (III) and (IV).
ChemInform Abstract: Synthesis and Biological Activity of Some New Substituted Pyrazolines and Isoxazolines.
Authors: SHINGARE M. S. , SIDDIQUI H. B.
Published: May 2016

Twenty‐eight derivatives of type (III) are prepared and used as educts for the synthesis of the title compounds (V) (17 examples), (VII) (18 examples) and (IX)/(X) (17 examples).
ChemInform Abstract: Synthesis and Antifilarial Activity of Benzimidazole‐2‐carbamates Carrying an Amino Acid Side Chain at the 5(6)‐Position.
Authors: DIVAKAR K. J. , RAO M. K. , SHRIVASTAVA R. , REDDY A. B.
Published: May 2016

Various title compounds, e.g. the derivatives (IV), are prepared and tested for their antifilarial activity.
ChemInform Abstract: Synthesis and Rearrangement of 1′,2′,3′,4′‐Tetrahydrospiro(indan‐2,3′‐isoquinoline)‐1′‐ones: A New Approach to Benzo(b)phenanthridinones.
Authors: ALONSO R. , CASTEDO L. , DOMINGUEZ D.
Published: May 2016

Condensation reaction of the indanol (I) with 3‐bromophthalide (II) yields the amide (III) which is oxidized to give the ketone (IV).
ChemInform Abstract: Bis(phenylethylenedithio)tetrathiafulvalene (BPhEDT‐TTF).
Authors: VARMA K. S. , EVANS J. , EDGE S. , UNDERHILL A. E. , BOJESEN G. , BECHER J.
Published: May 2016

The dimercaptodithiolethione disodium salt (I) reacts with the dibromophenylethane (II) to give the thione (III) which undergoes coupling in triethyl phosphite, yielding a mixture of the isomeric tetrathiafulvalenes (IV) and (V).
ChemInform Abstract: Chemotherapeutic Agents. Part 14. Synthesis of π‐Deficient Pyrimidines Linked with π‐Rich Heterocycles as Antimicrobial Agents.
Authors: RAM V. J.
Published: May 2016

The 2‐thiouracils (I) are used as starting materials for a series of title compounds.
ChemInform Abstract: Unusual O‐Alkylation with Iodomethyltrimethylsilane.
Authors: CHAKRABORTY T. K. , REDDY G. V.
Published: May 2016

Alcohols such as (I) react with the iodomethylsilane (II) in the presence of tetrabutylammonium iodide, forming the methyl ethers (III) and the trimethylsilyl ethers (IV).
ChemInform Abstract: Carbonylation of (η5‐Indenyl)(CO)2Fe‐α‐Alkoxyalkyl Complexes Using Bimetallic α‐Alkoxyacyl Intermediates.
Authors: LEVITRE S. A. , CUTLER A. R. , FORSCHNER T. C.
Published: May 2016

Treatment of the alkoxymethyl complexes (I) with the ferrate (II) affords the bimetallic alkoxyacetyl intermediates (III) characterized by IR spectral data.
ChemInform Abstract: Reactions of Dinuclear Metal Carbonyl α‐Diimine Complexes with Alkynes. Part 6. C‐C and C‐N Couplings and Alkyl C‐H Activation in Reactions of (σ,σ(N,N′)‐N,N′‐Diisopropyl‐1,4‐diaza‐1,3‐butadiene)(μ2,η2‐d# imethyl acetylenedicarboxylate)diiron Pentacarbonyl.
Authors: MULLER F. , VAN KOTEN G. , VRIEZE K. , DUINEVELD K. A. A. , HEIJDENRIJK D. , MAK A. N. S. , STAM C. H.
Published: May 2016

The title complex (I) (prepared previously) which is fluxional in solution, crystallizes in Pbca with Z = 8. Its reactivity depends strongly on the experimental conditions.
ChemInform Abstract: Ligand and Substituent Effects on the Dynamics and Structure of Agostic Complexes of the Type C5R5(L)Co(CH2CHR′‐μ‐H)+BF‐ 4 (L: P(OMe)3, PMe3; R: H, Me; R′: H, Me).
Authors: BROOKHART M. , LINCOLN D. M. , VOLPE A. F. JUN. , SCHMIDT G. F.
Published: May 2016

Protonation of the ethylene complexes (Ia) gives agostic complexes (II).
ChemInform Abstract: Reactions of Dinuclear Metal Carbonyl α‐Diimine Complexes with Alkynes. Part 10. Flyover Bridge Formation via a Reversible C‐C Coupling in Reactions of Diruthenium Pyridine‐2‐carbaldimine Complexes with Alkynes.
Authors: MULLER F. , VAN KOTEN G. , POLM L. H. , VRIEZE K. , ZOUTBERG M. C. , HEIJDENRIJK D. , KRAGTEN E. , STAM C. H.
Published: May 2016

The reaction of the pyridine‐2‐carbaldimine‐bridged complex (I) with dimethyl acetylenedicarboxylate (IIa) or methyl propynoate (IIb) leads to C‐C coupling with formation of the complexes (III) in which the Ru‐Ru bond is absent.
ChemInform Abstract: 1,4‐Diene Derived (η3‐Allyl)palladium Complexes. Part 4. trans‐Bis(5‐alkoxy‐ and 5‐hydroxy‐1‐3‐η3‐cyclohexenyl)palladium Complexes by Palladium(II)‐Promoted Addition of Alcohols and Water to 1,2‐Dialkyl‐1,4‐cyclohexadienes.
Authors: AAKERMARK B. , SOEDERBERG B. C. + , HALL S. S.
Published: May 2016

The cyclohexa‐1,4‐dienes (I) and (V) are treated with bis(acetonitrile)palladium dichloride (II) in the alcohols (III) or aqueous acetone to produce the chloro‐bridged bis(trans‐alkoxy(hydroxy)cyclohexenyl)dipalladium complexes (IV) or (VI) as the main products.
ChemInform Abstract: Terpenoids. Part 84. Synthesis of 2‐(2‐Acetoxyisopropyl)‐5,8‐dimethyl‐1,4‐dihydronaphthalene (Acetyldehydrorishitinol), a Sesquiterpenic Stress Metabolite from Potatoes.
Authors: SUDALAI A. , RAO G. S. K.
Published: May 2016

The title compound (V) is synthesized as shown in the scheme.
ChemInform Abstract: Photoinduced Molecular Transformations. Part 101. Photochemistry of Steroidal 6‐Membered Cyclic α‐Nitro Enones.
Authors: SUGINOME H. , KUROKAWA Y.
Published: May 2016

The nitrocholestenones (III) and (VII), steroidal α‐nitro enones, are prepared according to the scheme.
ChemInform Abstract: Natural 2,6‐Dialkyl‐3‐piperidinols. Part 9. Total Synthesis of (.+‐.)‐Prosafrinine and 13C NMR Studies of Some Analogous Compounds.
Authors: PATERNE M. , DHAL R. , BROWN E.
Published: May 2016

The title alkaloid (Xa) is synthesized accompanied of its epimer, (±)‐3‐epiprosafrinine (Xb), according to the scheme.
ChemInform Abstract: Heteroyohimbane Analogues from 3‐Acetyl‐7,12‐dihydro‐2‐methyl‐6H‐indolo(2,3‐a)quinolizinium Chloride.
Authors: TEUBER H.‐J. , QUINTANILLA‐LICEA R.
Published: May 2016

The unsaturated side chain in (III), required for the construction of alkaloid structures, is obtained by the base‐catalyzed reaction of the 2‐methyl group of (I) with aldehydes (II); further elaboration of (III) to the corresponding tetrahydropyridines can be accomplished by treatment with NaBH4.
ChemInform Abstract: Studies in Nucleosides. Part 22. Synthesis of 4‐Amino/Hydroxy‐1‐(cyclohexyl/2′‐tetrahydropyranyl)‐6‐amino/n‐propoxy‐1H‐pyrazolo(3,4‐d)pyrimidines and Their Antiallergic Activity.
Authors: DEO K. , AVASTHI K. , PRATAP R. , BHAKUNI D. S. , KAR K.
Published: May 2016

The products (III), (V), (VI), (VIII), (IX), (XI)‐(XIII) and (XV) show moderate passive cutaneous anaphylaxis (PCA) activity.
ChemInform Abstract: A Practical Method for Synthesis of Penicillin and Cephalosporin Sulfoxides.
Authors: TANAKA M. , KONOIKE T. , YOSHIOKA M.
Published: May 2016

The mixture of hydrogen peroxide (35%), formic acid, and polyphosphoric acid is employed in the oxidation of the penicillins (I) and cephalosporins (III) to give the sulfoxides (II) or (IV).
ChemInform Abstract: Ptaquilosin, the Aglycone of a Bracken Carcinogen Ptaquiloside: Chemical Derivation from Ptaquiloside and Reactivity.
Authors: KIGOSHI H. , SAWADA A. , IMAMURA Y. , NIWA H. , YAMADA K.
Published: May 2016

The tetraacetate (Ib) of ptaquiloside (Ia) can be successfully converted to ptaquilosin (VI) following the reaction sequence shown in the scheme.
ChemInform Abstract: Preparation and Characterization of TiO2‐SiO2 Aerosil Colloidal Mixed Dispersions.
Authors: MORRISON C. , KIWI J.
Published: May 2016

Three methods for loading colloidal silicas of different surface areas with titania, prepared from TiCl4 and used in sol form in aqueous solution, are developed.
ChemInform Abstract: Differential Molar Heats of Adsorption of Ammonia on Silicious Mordenites at High Temperature.
Authors: TSUTSUMI K. , NISHIMIYA K.
Published: May 2016

Mordenite zeolites with various Si/Al ratios are activated (decationized) at 773 K under a vacuum of 1 mPa.
ChemInform Abstract: Temperature Study of O(3P) + PH3 Reaction Rate: Kinetic Measurements and Planetary Atmospheric Implications.
Authors: NAVA D. F. , STIEF L. J.
Published: May 2016

The title reaction is studied over the temp. range 208‐423 K by using flash photolysis to produce atomic oxygen from N2O and time‐resolved resonance fluorescence detection of O(3P).
ChemInform Abstract: Systematic Design of Chemical Oscillators. Part 52. A Systematically Designed pH Oscillator: The Hydrogen Peroxide‐Sulfite‐Ferrocyanide Reaction in a Continuous‐Flow Stirred Tank Reactor.
Authors: RABAI G. , KUSTIN K. , EPSTEIN I. R.
Published: May 2016

The H2O2‐HSO3‐‐Fe(CN)64‐ system is used to demonstrate that the alternator model can be used to construct and to analyze relatively simple oscillatory reactions.
ChemInform Abstract: Preparation and Thermal Reactivity of Magnesium Metavanadates.
Authors: ULICKA L. , HRONSKA S.
Published: May 2016

The exact experimental conditions necessary for the preparation of the title compounds Mg(VO3)2·n H2O (n = 6, 7, 8) from aqueous solution of MgO and V2O5 are described.
ChemInform Abstract: Crystal Chemistry of Oxotantalates. Part 4. On the Metastable High Temperature Compound Mn2Zn3Ta6O20.
Authors: ROHWEDER U. , MUELLER‐BUSCHBAUM HK. +
Published: May 2016

Single crystals of the title compound are prepared by heating pressed pellets of MnO, ZnO, and Ta2O5 (1:2:1) at 2000 °C for more than 1 h. A second unknown tantalate, MnZn2Ta2O8, is obtained as a by‐product.
ChemInform Abstract: Properties of a New One‐Dimensional Semiconducting Ternary Compound: TEDA (Triethylenediamine)·I2.5·TCNQ.
Authors: BANDRAUK A. D. , TRUONG K. D. , CARLONE C.
Published: May 2016

The oxidation of triethylenediammonium diiodide with tetracyanoquinodimethane in methanol yields the new semiconducting title compound which is made up of linear chains of TCNQ‐1/2, nonlinear chains of I3‐, and monoiodides of doubly charged triethylenediamines.
ChemInform Abstract: Apparent Molar Volume and Adiabatic Compressibility Studies of Aqueous Solutions of Some Drug Compounds at 25 °C.
Authors: IQBAL M. , VERRALL R. E.
Published: May 2016

As part of a comprehensive investigation of drug‐protein interactions in biological systems the results of the investigations are qualitatively interpreted in terms of solute‐solvent and solute‐solute interactions.
ChemInform Abstract: Syntheses Using Alkenediazonium Salts. Part 6. 2,2‐Diethoxy‐1‐ethenediazonium Hexachloroantimonate: A Versatile Building Block for the Synthesis of 5‐ and 6‐Membered N‐Heterocycles. Crystal and Molecular Structure of 5′‐Phenyl‐3′‐(2‐phenyl‐6H‐1,3,4‐oxadiazine‐5‐yl)spiro(isobenzofuran‐1(3H),2′(3′H)‐(1,3,4)‐oxadiazol)‐3‐one.
Authors: SAALFRANK R. W. , WEISS B. , WIRTH U. , PETERS K. , VON SCHNERING H. G.
Published: May 2016

While the reaction of the diazonium salts (I) with 21 amines leads to triazoles of type (III), the previously reported oxadiazine (VI) is formed in the reaction of (Ia) with the hydrazide of benzoic acid (discussion of the mechanisms involved).
ChemInform Abstract: Rearrangement of 1,3‐Oxathiolane Sulfoxides.
Authors: LEE W. S. , HAHN H. G. , KIM I. K.
Published: May 2016

The title compounds (I), in which the sulfoxide O atom and the 2‐Me group are on the same face of the oxathiolane ring, undergo a sigmatropic rearrangement to produce the ring expansion products (II).
ChemInform Abstract: Synthesis of 11‐Oxaestrogens via Dye‐Sensitized Photooxygenation of a 9,11‐Didehydroestrone Derivative.
Authors: PLANAS A. , SALA N. , BONET J.‐J.
Published: May 2016

The dye‐sensitized photooxygenation, outlined in the preceding paper, is applied to the synthesis of the 11‐oxaestrone (VII) in the key step.
ChemInform Abstract: Oxidation of Allyl and Benzyl Ethers by 2,3‐Dichloro‐5,6‐Dicyanobenzoquinone (DDQ).
Authors: LEE‐RUFF E. , ABLENAS F. J.
Published: May 2016

The title reactions, shown for some representatives, are carried out in toluene (reflux) or in CCl4 (20 °C) and lead to the corresponding carbonyl containing products (aldehydes and ketones) and alcohols.
ChemInform Abstract: Chlorination of Alkenes with Manganese Dioxide‐Trimethylchlorosilane.
Authors: BELLESIA F. , GHELFI F. , PAGNONI U. M. , PINETTI A.
Published: May 2016

The title reagent system gives rise to a smooth and high‐yield chlorination of unconjugated alkenes such as (I) without isomerization.
ChemInform Abstract: Sodium Telluride Mediated Sulfenylation of α‐Halo Carbonyl Compounds with Diphenyl Disulfide.
Authors: PADMANABHAN S. , OGAWA T. , SUZUKI H.
Published: May 2016

The first "one‐pot" way for preparing α‐sulfenylated carbonyl compounds from α‐halo compounds and organic disulfides is reported.
ChemInform Abstract: Synthesis of Substituted Benzocyclobutenediones.
Authors: LIEBESKIND L. S. , LESCOSKY L. J. , MCSWAIN C. M. JUN.
Published: May 2016

The base‐catalyzed (2 + 2)cycloaddition reaction of the ketene acetal (II) with the bromoarenes (I), followed by acidic acetals hydrolysis, produces the benzocyclobutenones (III) and the regioisomer (IV) of (IIIa).
ChemInform Abstract: Synthesis and Reactions of 2‐Amino‐1‐aryl‐5‐oxo‐δ2‐pyrroline‐3‐carbonitriles.
Authors: SCHAEFER H. + , GEWALD K.
Published: May 2016

In the presence of K2CO3 the reactions between the α‐chloroacetanilides (I) and malononitrile (II) yield the title compounds (III).
ChemInform Abstract: Synthesis of Amino Acids and Related Compounds. Part 36. Synthesis of 5‐Alkyl‐4‐oxazoleacetic Acid Derivatives with Hypolipidemic Activities.
Authors: SEKI M. , MORIYA T. , MATSUMOTO K. , TAKASHIMA K. , MORI T. , ODAWARA A. , TAKEYAMA S.
Published: May 2016

The key intermediates (III) for the synthesis of the oxazoleacetates (VI) are prepared either by alkylation of the N‐acetylaminomethyl ketone (I) or by Dakin‐West reaction of the aspartic acid azlactones (IV).
ChemInform Abstract: Synthetic Studies on Spiroketal Natural Products. Part 3. Enantioselective Synthesis of 1,6‐Dioxaspiro(4.5)decane Compounds.
Authors: IWATA C. , MORITANI Y. , SUGIYAMA K. , IZAKI H. , KUROKI T. , IMANISHI T.
Published: May 2016

Starting with the chiral sulfoxide (I) and the γ‐lactone (II), the hydroxypropyldihydropyrans (V) are prepared.
ChemInform Abstract: Intramolecular Diels‐Alder Reactions of 1,2,4‐Triazines. Routes to Condensed Pyrazines via Cycloaddition of Nitrile Dienophiles.
Authors: TAYLOR E. C. , FRENCH L. G.
Published: May 2016

Benzil (I) undergoes cyclocondensation with salicyl hydrazide (II) and ammonium acetate (III) to produce the 1,2,4‐triazine (IV) which is converted to the cyanomethoxy derivative (VI).
ChemInform Abstract: Crown Ethers with Twin Propeller Substituents.
Authors: KINNEAR K. I. , LOCKHART J. C. , HEWKIN C. T. , RUSHTON D. J.
Published: May 2016

The title compounds, i.e. the RS and the SS(RR) isomer of (IV), contain two three‐bladed propeller units which, in controlling the rigidity of the crown ether, could result in improved cation selectivity.
ChemInform Abstract: Synthesis, Crystal Structure, and Conformational Property of N,N′‐Dimethyl‐1,11‐(methanoaminomethano)‐5H,7H‐dibenzo(b,g)(1,5)thiazocine: A New Heterocyclic System.
Authors: FUJIHARA H. , OI N. , AKAISHI R. , KAWAI T. , FURUKAWA N.
Published: May 2016

The tetrakis(bromomethyl)diphenyl sulfide (I) reacts with methylamine (II), producing the new thiazocine (III).
ChemInform Abstract: Synthesis and Competitive Thermal Transformation of 3‐((2‐(2‐Propynylthio)phenyl)amino)‐1,2,4‐triazines.
Authors: TAYLOR E. C. , PONT J. L. , WARNER J. C.
Published: May 2016

The methylsulfonyltriazines (I) are coupled with o‐aminothiophenol (II), forming the thioaryltriazines (III) which undergo Smiles rearrangement to give the arylaminotriazines (IV).
ChemInform Abstract: Gas‐Phase Acidities of Organosilanes and Electron Affinities of Organosilyl Radicals.
Authors: WETZEL D. W. , SALOMON K. E. , BERGER S. , BRAUMAN J. I.
Published: May 2016

The equilibrium gas‐phase acidities for (I)‐(III) and the cross sections for electron photodetachment of the corresponding conjugate bases are measured, using ion cyclotron resonance spectrometry.
ChemInform Abstract: Silylcupration‐Mediated Synthesis of 2‐Substituted Allylamines.
Authors: CAPELLA L. , DEGL'INNOCENTI A. , REGINATO G. , RICCI A. , TADDEI M.
Published: May 2016

The (N,N‐bissilyl)propargylamine (I) is converted to an intermediate organocuprate which reacts with various electrophiles (III) to give the 2‐substituted allylic amines (IV).
ChemInform Abstract: A New Direct Method for Introducing 2‐(2,4,6‐Tri‐tert‐butylphenyl)‐2‐phosphavinylidene Group. Formation of 1‐Phospha‐ and 1,3‐Diphosphaallenes.
Authors: YOSHIFUJI M. , SASAKI S. , INAMOTO N.
Published: May 2016

The dichlorophosphaethylene (III) is converted to the monosilylated derivative (IX) which is consecutively lithiated and coupled with the carbonyl compounds (XII), producing the 1‐phosphaallenes (XIII).
ChemInform Abstract: Stereo‐ and Regiochemistries of the Oxidations of 2‐Methoxy‐5‐tert.‐butyl‐1,3,2‐dioxaphosphorinanes and the Cyclic Methyl 3′,5′‐Phosphite of Thymidine by H2O/I2 and O2/AIBN to P‐Chiral Phosphates. 17O NMR Assignment of Phosphorus Configuration to the Diastereomeric Thymidine Cyclic Methyl 3′,5′‐Monophosphates.
Authors: BENTRUDE W. G. , SOPCHIK A. E. , GAJDA T.
Published: May 2016

The O2/AIBN oxidation of the simple system (I) and the thymidine‐based phosphite (III) is highly regio‐ and stereospecific, proceeding with retention of configuration at phosphorus and in yields equivalent to those obtained with the classical I2/H2O method.
ChemInform Abstract: Synthesis, Structural and Magnetic Properties of Macrocyclic Aza‐Amido Binuclear Copper(II) Complexes.
Authors: MANDAL S. K. , THOMPSON L. K. , NEWLANDS M. J. , BISWAS A. K. , ADHIKARY B. , NAG K. , GABE E. J. , LEE F. L.
Published: May 2016

The complex (IIIb) is obtained in an analogous manner as (IIIa).
ChemInform Abstract: A Spectroscopic Study of the Reaction of Gold Atoms with CO in a Rotating Cryostat: Formation of a Variety of Gold Carbonyls.
Authors: CHENIER J. H. B. , HOWARD J. A. , JOLY H. A. , MILE B. , TOMIETTO M.
Published: May 2016

It is evidenced by EPR, FTIR, and UV/VIS spectroscopy that in the reaction of gold atoms with CO in inert hydrocarbon matrices at 77 K AuCO, Au(CO)2, a gold microcrystallite‐CO complex and, upon annealing, Au2(CO)4 are formed.
ChemInform Abstract: Ring Slip in Associative Reactions of Some Indenyl and Phenylcyclopentadienyl Iridium Complexes.
Authors: HABIB A. , TANKE R. S. , HOLT E. M. , CRABTREE R. H.
Published: May 2016

The complex (I) undergoes substitution with tBuNC (II), CO (VII) and PMe3 (IX), while the cyclopentadienyl and the tetrahydroindenyl analogue are inert.
ChemInform Abstract: Oxidative Coupling of cis‐Carbene Ligands: Synthesis, Structure, and Reactivity of an Iridium(III) Bis(oxacyclopentylidene) Complex.
Authors: O'CONNOR J. M. , PU L. , RHEINGOLD A. L.
Published: May 2016

The alkynol cyclization method is used to prepare the title complex (III), crystallizing in P1 with Z=2.
ChemInform Abstract: Novel Bis(dimethinemerocyanine) Dyes with Isolated Chromophores in the Molecule Containing the Sulfobutyl Group and Their Aggregation Tendency in Aqueous Solution.
Authors: KUSSLER M. , BALLI H.
Published: May 2016

The merocyanines (III) with chromophores separated by a polymethylene chain as "isolator" are prepared and characterized by electronic spectra.
ChemInform Abstract: Studies on Taxane Synthesis. Part 1. Synthesis of 3,8,11,11‐Tetramethyl‐4‐oxobicyclo(5.3.1)undecane as a Model for Taxane Synthesis.
Authors: OHTSUKA Y. , OISHI T.
Published: May 2016

Starting with β‐ionone (I), the bicyclo(5.3.1)undecanone (VII), which contains the A and B rings of taxane diterpenes, is prepared in a 21‐step reaction sequence.
ChemInform Abstract: Synthesis and Reactions of 1,2:5,6‐Di‐O‐isopropylidene‐3‐O‐((triorganostannyl)methyl)‐α‐D‐glucofuran# ose.
Authors: TAYLOR O. J. , WARDELL J. L.
Published: May 2016

The title compound (III) is prepared starting from the glucofuranose (I).
ChemInform Abstract: Cp2ZrCl2‐AgClO4: Efficient Promoter for the Friedel‐Crafts Approach to C‐Aryl Glycosides.
Authors: MATSUMOTO T. , KATSUKI M. , SUZUKI K.
Published: May 2016

The glycosyl halides (I) or (IV) react with the methoxyarenes (II) or (V) in the presence of dicyclopentadienylzirconium dichloride and silver perchlorate to give the C‐aryl glycosides (III) or (VI).
ChemInform Abstract: Crystal Structures and Phase Transitions of the Tetramorphic RbGeI3
Authors: THIELE G. , ROTTER H. W. , SCHMIDT K. D.
Published: May 2016

are studied by XRD, Raman spectroscopy, and DTA/DSC.
ChemInform Abstract: Equilibrium Reaction of Iridium and Oxygen at High Temperatures.
Authors: CARPENTER J. H.
Published: May 2016

New transpiration experiments show that, at least up to 1775 K, gaseous IrO3 is the predominant product of the iridium oxidation in 1 atm of O2.
ChemInform Abstract: Crystal Structure of Pb13O10Br6, a New Lead Oxidehalide.
Authors: RIEBE H.‐J. , KELLER H.‐L.
Published: May 2016

Yellow single crystals of the title compound are obtained from the reaction of PbO and PbBr2 at 680 °C (10:3 molar mixture, Pt‐ampoule, 30 d).
ChemInform Abstract: Identification of Protonated β‐Hydroxycarbonyl Compounds by Reactive Collisions in Tandem Mass Spectrometry.
Authors: KENTTAEMAA H. I. + , COOKS R. G.
Published: May 2016

Model ions such as (I) undergo collision‐induced dehydration and vinylation with subsequent loss of ethanol to give (III), while the 3‐hydroxy isomer of (I) does not react.
ChemInform Abstract: Lewis Base Adducts of Group 11 Metal(I) Complexes. Part 48. Heterobimetallic Tris(dithiocarbamato)cobalt(III)‐Copper(I) Halide Adducts as a Vehicle for Novel Copper(I) Halide Clusters (Structurally Characterized).
Authors: HEALY P. C. , SKELTON B. W. , WHITE A. H.
Published: May 2016

Reaction of the appropriate tris(dithiocarbamato)cobalt(III) with Cu(I) halides in MeCN gives 1:3 and 2:5 adducts (I) and (II), respectively.
ChemInform Abstract: Stability of the Complex of Nickel(II) with Cyclam.
Authors: EVERS A. , HANCOCK R. D.
Published: May 2016

The formation constant of the title complex is measured by an out‐of‐cell technique and is found to be somewhat less than a value previously reported.
ChemInform Abstract: Chiral Cyclobutanones by (2 + 2) Cycloaddition of Dichloroketene to Carbohydrate Enol Ethers.
Authors: REDLICH H. , LENFERS J. B. , KOPF J.
Published: May 2016

Dichloroketene (I), generated in situ from the precursor (V), reacts with unsaturated carbohydrate derivatives such as (II), (VI) or (IX) to give cycloadducts such as (III), (VII) + (VIII), or (X).
ChemInform Abstract: Reactions of 4,4‐Diphenylcarbena‐2,5‐cyclohexadiene and Related Systems in Dimethyl Sulfoxide.
Authors: FREEMAN P. K. , TAFESH A. M. , CLAPP G. E.
Published: May 2016

The tosylhydrazones of the diphenylcyclohexadienone (III), diphenylcyclohexenone (IX), and diphenylcyclohexanone (XV) are lithiated with methyllithium to generate the salts (I), (VIII), and (XIII) respectively.
ChemInform Abstract: Palladium(0)‐Catalyzed Reaction of Methyl γ,δ‐Epoxysorbate with Nitrogen Nucleophiles.
Authors: TSUDA T. , HORII Y. , NAKAGAWA Y. , ISHIDA T. , SAEGUSA T.
Published: May 2016

The epoxy ester (I) mentioned in the title is treated with the N‐nucleophiles (II) in the presence of Pd‐catalysts to yield the γ‐coupling products (IIIb), (IIIc), and (IIIe) and the regioisomeric oxohexenoic acid esters (IV) and (V).
ChemInform Abstract: Regioselectivity of the Condensation of Stabilized Phosphoylids with 3‐Substituted Phthalic Anhydrides.
Authors: BREAU L. , KAYSER M. M.
Published: May 2016

Condensation of the stabilized phosphorane (IV) with various 3‐substituted phthalic anhydrides such as (I) or (V) are investigated.
ChemInform Abstract: Polymer‐Supported Alkyl Azodicarboxylates for Mitsunobu Reactions.
Authors: ARNOLD L. D. , ASSIL H. I. , VEDERAS J. C.
Published: May 2016

The Mitsunobu reaction, an extremely versatile means of nucleophilic replacement of hydroxyl groups involving activation of an alcohol by the adduct of Ph3P and a dialkyl azodicarboxylate, is limited mostly by several factors associated with the expensive azodicarboxylate reagents.
ChemInform Abstract: Regio‐ and Stereoselectivity in Rearrangements of Bicyclic N,N‐Ylides.
Authors: FENNHOFF G. , HEESING A.
Published: May 2016

Reaction of the bicyclic compound (I) with the amination reagent (II) affords the amino azonia bicycloalkanes (IIIa) + (IVa).
ChemInform Abstract: Intramolecular Photochemical Electron Transfer. Part 5. Solvent Dependence of Electron Transfer in a Porphyrin‐Amide‐Quinone Molecule.
Authors: SCHMIDT J. A. , LIU J.‐Y. , BOLTON J. R. , ARCHER M. D. , GADZEKPO V. P. Y.
Published: May 2016

The rates of the electron transfer from the porphyrin excited‐singlet state to the quinone moiety in (I) are correlated with large solvent effects in various solvents such as DME, MeCN, BuOH, PhCl, and CHCl3.
ChemInform Abstract: Stereoselective Photochemical Cyclization of 3‐O‐Benzyl‐6‐deoxy‐1,2‐O‐isopropylidene‐α‐D‐xylohexofuranos‐5‐ulose Derivatives.
Authors: ARAKI Y. , ARAI Y. , ENDO T. , ISHIDO Y.
Published: May 2016

The photoirradiation of a solution of the furanosulose (I) in methanol or benzene yields the cyclization products (II) and (III).
ChemInform Abstract: An Evidence for Remarkable Difference of the Electrophilicity Between Two Carbonyl Groups in the Photoexcited 1,2‐Naphthoquinone. Photocycloaddition Reaction of 1,2‐Naphthoquinone with Olefins.
Authors: TAKUWA A.
Published: May 2016

Photocycloaddition reactions of the olefins (II) and (V) with the o‐quinone (I) are investigated.
ChemInform Abstract: 2,4‐Dimethylenebicyclobutane: Preparation, Characterization, and Relationship to the Non‐Kekule Isomer of Benzene.
Authors: SNYDER G. J. , DOUGHERTY D. A.
Published: May 2016

Direct photolysis (‐78 °C or lower) or thermolysis (‐78 °C or higher) of diazene (I) leads to dimers (IV) and (V) by a mechanism confined exclusively to the singlet manifold.
ChemInform Abstract: Negative Temperature Dependence in the Decay of Triplet Biradicals (II).
Authors: WANG J. , DOUBLEDAY C. JUN. , TURRO N. J.
Published: May 2016

Evidence presented suggests that the high‐temp.
ChemInform Abstract: Oxidation of Alkynes Catalyzed by Mo(VI) and W(VI) Polyoxometalates.
Authors: BALLISTRERI F. P. , FAILLA S. , SPINA E. , TOMASELLI G. A.
Published: May 2016

Terminal (I) and internal alkynes (V) are oxidized with hydrogen peroxide in the presence of Mo(VI) or W(VI) polyphosphates, yielding mainly the ketones or diketones (II) or (VI) and the carboxylic acids (III), (IV), and (VII) depending on the catalyst used.
ChemInform Abstract: 2,2′‐Bifurylidene‐5,5′‐diones, Coumarins, 3a,7a‐Dihydro‐1H‐inden‐1‐ones, and 5H‐Furo(3,2‐b)pyran‐5‐ones from Propyne and Carbon Monoxide.
Authors: RAUTENSTRAUCH V. , MEGARD P. , GAMPER B. , BOURDIN B. , WALTHER E. , BERNARDINELLI G.
Published: May 2016

The reaction of (I) with (II) is reinvestigated yielding a complex product mixture which contains five major components: the known product (III) as well as (IV) and (Va)‐(VIIa) (X‐ray analysis of (VIa): space group C2/c with Z = 8, and of (VIIa): P21/c with Z=4).
ChemInform Abstract: Phase‐Transfer‐Catalyzed Synthesis of Oligoethylene Glycols and Derivatives.
Authors: BARTSCH R. A. , CASON C. V. , CZECH B. P.
Published: May 2016

The α,ω‐diols (I) undergo base‐induced coupling with the chloroethyl tetrahydropyranyl ethers (II) in the presence of a phase‐transfer catalyst, yielding the oligoethylene glycols (III) after deprotection by acidic hydrolysis.
ChemInform Abstract: Hydrocarbon Analogue of the Squarate Dianion. Evidence for Its Possible Aromaticity and the Examination of Its Behavior with Two Quenching Agents.
Authors: THORSTAD W. T. , MILLS N. S. , BUCKELEW D. Q. , GOVEA L. S.
Published: May 2016

The dianion salt (III) mentioned in the title is generated by twofold deprotonation of 1,2‐dimethyl‐3,4‐dimethylenecyclobutane (I) with butyllithium (II) under two different conditions.