bluuebunny/crossref_metadata_2025_split huggingface dataset:
Intumescent flame‐retarded building parts manufactured from polyolefines as well as from composites of polyolefines and bismaleinimides
Authors: Horacek Heinrich 
Published: May 2012

AbstractCommercial intumescent flame retardants and intumescent compounds were tested as flame retardants for polypropylene. Their routes of decomposition were followed up by thermal gravimetric analysis, differential scanning calorimetry as well as thermal mechanic analysis and described by chemical formula, balances of weight, and heats of formation. These investigations showed that the combination of ammonium polyphosphate, polyols, and melamine exerted intumescence at 400°C and melamine was no blowing agent but reacted to melamine polyphosphate. Further they made clear that bisethylenediamine phosphate exerted intumescence at 350°C and degraded to piperazine phosphate. Intumescent flame‐retarded building parts exemplified the advantage of intumescent flame retardance by the time delay until they still fulfilled their function. F15 classification was achieved for thick walled intumescent polypropylene pipes and thin walled electrical boxes consisting of a flame‐retarded glass reinforced bismaleinimide core and an intumescent polyolefine shell in furnace fire tests. The difference in temperatures inside and outside of the building parts was calculated and compared with measurements in fire tests. © 2012 Wiley Periodicals, Inc. J Appl Polym Sci, 2012
β‐Turn Analogues in Model αβ‐Hybrid Peptides: Structural Characterization of Peptides Containing β2,2Ac6c and β3,3Ac6c Residues
Authors: Basuroy Krishnayan , Rajagopal Appavu , Raghothama Srinivasarao , Shamala Narayanaswamy , Balaram Padmanabhan 
Published: May 2012

AbstractThe effect of gem‐dialkyl substituents on the backbone conformations of β‐amino acid residues in peptides has been investigated by using four model peptides: Boc‐Xxx‐β2,2Ac6c(1‐aminomethylcyclohexanecarboxylic acid)‐NHMe (Xxx=Leu (1), Phe (2); Boc=tert‐butyloxycarbonyl) and Boc‐Xxx‐β3,3Ac6c(1‐aminocyclohexaneacetic acid)‐NHMe (Xxx=Leu (3), Phe (4)). Tetrasubstituted carbon atoms restrict the ranges of stereochemically allowed conformations about flanking single bonds. The crystal structure of Boc‐Leu‐β2,2Ac6c‐NHMe (1) established a C11 hydrogen‐bonded turn in the αβ‐hybrid sequence. The observed torsion angles (α(ϕ≈−60°, ψ≈−30°), β(ϕ≈−90°, θ≈60°, ψ≈−90°)) corresponded to a C11 helical turn, which was a backbone‐expanded analogue of the type III β turn in αα sequences. The crystal structure of the peptide Boc‐Phe‐β3,3Ac6c‐NHMe (4) established a C11 hydrogen‐bonded turn with distinctly different backbone torsion angles (α(ϕ≈−60°, ψ≈120°), β(ϕ≈60°, θ≈60°, ψ≈−60°)), which corresponded to a backbone‐expanded analogue of the type II β turn observed in αα sequences. In peptide 4, the two molecules in the asymmetric unit adopted backbone torsion angles of opposite signs. In one of the molecules, the Phe residue adopted an unfavorable backbone conformation, with the energetic penalty being offset by a favorable aromatic interaction between proximal molecules in the crystal. NMR spectroscopy studies provided evidence for the maintenance of folded structures in solution in these αβ‐hybrid sequences.
Pancolonic motor response to subsensory and suprasensory sacral nerve stimulation in patients with slow-transit constipation
Authors: Dinning P G , Hunt L M , Arkwright J W , Patton V , Szczesniak M M , Wiklendt L , Davidson J B , Lubowski D Z , Cook I J 
Published: May 2012

Abstract

Background
Sacral nerve stimulation (SNS) is emerging as a potential treatment for patients with constipation. Although SNS can elicit an increase in colonic propagating sequences (PSs), the optimal stimulus parameters for this response remain unknown. This study evaluated the colonic motor response to subsensory and suprasensory SNS in patients with slow-transit constipation.

Methods
Patients with confirmed slow-transit constipation were studied. Either a water-perfused manometry catheter or a high-resolution fibre-optic manometry catheter was positioned colonoscopically to the caecum. A temporary electrode was implanted transcutaneously in the S3 sacral nerve foramen. In the fasted state, three conditions were evaluated in a double-blind randomized fashion: sham, subsensory and suprasensory stimulation. Each 2-h treatment period was preceded by a 2-h basal period. The delta (Δ) value was calculated as the frequency of the event during stimulation minus that during the basal period.

Results
Nine patients had readings taken with a water-perfused catheter and six with a fibre-optic catheter. Compared with sham stimulation, suprasensory stimulation caused a significant increase in the frequency of PSs (mean(s.d.) Δ value − 1·1(7·2) versus 6·1(4·0) PSs per 2 h; P = 0·004). No motor response was recorded in response to subsensory stimulation compared with sham stimulation. Compared with subsensory stimulation, stimulation at suprasensory levels caused a significant increase in the frequency of PSs (P = 0·006).

Conclusion
In patients with slow-transit constipation, suprasensory SNS increased the frequency of colonic PSs, whereas subsensory SNS stimulation did not. This has implications for the design of therapeutic trials and the clinical application of the device.
Modeling of Ethane Thermal Cracking Kinetics in a Pyrocracker
Authors: Ranjan P. , Kannan P. , Al Shoaibi A. , Srinivasakannan C. 
Published: May 2012

AbstractThe kinetics of ethane thermal cracking in industrial pyrocrackers was investigated using Aspen Plus. The radiant coils were modeled as a 1D plug‐flow reactor in which ethane is subjected to steam cracking. An improved reaction scheme for ethane cracking was proposed to predict product distribution which was compared with industrial data to validate the model. Further, the model was used to assess the effects of various process parameters, including coil outlet temperature, residence time, and steam‐to‐ethane ratio, on yield and composition of the cracked gas.
COPROX Fixed Bed Reactor – Temperature Control Schemes
Authors: Giunta P. , Moreno M. , Mariño F. , Amadeo N. , Lobarde M. 
Published: May 2012

AbstractDifferent temperature control schemes for the COPROX stage of a 5‐kW fuel cell system were analyzed. It was found that, among the schemes proposed, i.e., co‐ and countercurrent heat exchange, single adiabatic reactor and series of adiabatic reactors with interstage heat exchange, the best choice for temperature control was the series of adiabatic reactors with interstage heat exchange. This scheme represented the best way to keep the average temperature around 443 K, which was found to be the most suitable temperature for selectivity towards CO oxidation. If hydrogen is produced from ethanol steam reforming, the heat withdrawal can be carried out by the water/ethanol reformer feed mixture, thus contributing to the energy integration of the overall system.
ChemInform Abstract: A 3D Purely Inorganic Porous Framework Based on Keggin Polyoxoanions.
Authors: Han Xin‐Bao , Zhang Zhi‐Ming , Wang Zhi‐Shu , Zhang Huan , Duan Hui , Wang En‐Bo 
Published: May 2012

AbstractK2NaH2 [BW12O40]·12H2O, prepared by the conventional aqueous method, is characterized by single crystal XRD and IR spectroscopy.
ChemInform Abstract: Crystal Structure and a Giant Magnetoresistance Effect in the New Zintl Compound Eu3Ga2P4.
Authors: Tsujii Naohito , Uvarov Catherine A. , Klavins Peter , Yi Tanghong , Kauzlarich Susan M. 
Published: May 2012

AbstractSingle crystals of the new title compound are prepared by a molten flux method from mixtures of the elements in the atomic ratio Eu:Ga:P = 3:120:4 (alumina crucible, 1370 K, 16 h).
ChemInform Abstract: Enhancement of Localization Phenomena Driven by Covalency in the SrBiMn1.75Ti0.25O6 Manganite.
Authors: Asensio de Lucas E. , Alvarez‐Serrano I. , Cuello G. J. , Garcia‐Hernandez M. , Lopez M. L. , Pico C. , Veiga M. L. 
Published: May 2012

AbstractThe new title manganite (prepared by a citric acid route) is characterized by electron, X‐ray, and neutron diffraction between 4 and 700 K, and conductivity and magnetization measurements.
ChemInform Abstract: Two Isotypic Transition Metal Germanophosphates M4II(H2O)4 [Ge(OH)2(HPO4)2 (PO4)2] (MII: Fe, Co): Synthesis, Structure, Moessbauer Spectroscopy, and Magnetic Properties.
Authors: Huang Ya‐Xi , Zhang Xin , Huang Xuan , Schnelle Walter , Lin Jun , Mi Jin‐Xiao , Tang Mei‐Bo , Zhao Jing‐Tai 
Published: May 2012

AbstractThe title compounds are synthesized from mixtures of CoCl2 or FeCl2, GeO2, H3PO4, H2O, triethylamine, and 1,2‐propanediol (autoclave, 150 °C, 4 d, 85% yield).
ChemInform Abstract: Iron(III) Phosphates Obtained by Thermal Treatment of the Tavorite‐Type FePO4·H2O Material: Structures and Electrochemical Properties in Lithium Batteries.
Authors: Marx Nicolas , Bourgeois Lydie , Carlier Dany , Wattiaux Alain , Suard Emmanuelle , Le Cras Frederic , Croguennec Laurence 
Published: May 2012

AbstractThermal treatment of tavorite‐type FePO4·H2O leads to the formation of H0.8FePO4.4 (space group C2/c) and H0.4FePO4.2 (space group I41/amd).
ChemInform Abstract: Octahedral Pd2+ Coordination and Ferromagnetic Ordering in Pd(S2O7).
Authors: Bruns Joern , Eul Matthias , Poettgen Rainer , Wickleder Mathias S. 
Published: May 2012

AbstractBlue crystals of the title compound are prepared in nearly quantitative yield by the reaction of elemental Pd with SO3 at 120°C (2 d).
ChemInform Abstract: Stereodivergency in Catalytic Asymmetric Conjugate Addition Reactions of Glycine (Ket)imines.
Authors: Kim Hun Young , Li Jian‐Yuan , Kim Sungkyung , Oh Kyungsoo 
Published: May 2012

AbstractGlycine imine (I) undergoes syn‐selective conjugate addition with nitroalkenes (II) in the presence of chiral catalyst systems consisting of a copper(I) salt and a ligand derived from a multidentate amino alcohol.
ChemInform Abstract: New Hydrazine‐Based Organocatalyst for Asymmetric Diels—Alder Reaction of 1,2‐Dihydropyridines.
Authors: Okuyama Yuko , Osone Kenichi , Nakano Hiroto , Takeshita Mitsuhiro 
Published: May 2012

AbstractEnantioselective Diels—Alder reaction to synthesize optically active isoquinuclidine derivatives is accomplished using a new chiral hydrazinoalcohol as catalyst.
ChemInform Abstract: Oxidative Conversion of Silyl Enol Ethers to α,β‐Unsaturated Ketones Employing Oxoammonium Salts.
Authors: Hayashi Masaki , Shibuya Masatoshi , Iwabuchi Yoshiharu 
Published: May 2012

AbstractSix‐ and five‐membered ring substrates bearing aryl, alkyl and alkenyl substituents are converted to ketones, while a cycloheptene substrate leads to formation of an α‐aminooxylated ketone.
ChemInform Abstract: Heterogeneously Catalyzed Synthesis of Primary Amides Directly from Primary Alcohols and Aqueous Ammonia.
Authors: Yamaguchi Kazuya , Kobayashi Hiroaki , Oishi Takamichi , Mizuno Noritaka 
Published: May 2012

AbstractFormation of primary amides (II) is only observed in the presence of manganese oxide‐OMS‐2 independent of the starting material.
ChemInform Abstract: A General Strategy for the Perfluoroalkylation of Arenes and Arylbromides by Using Arylboronate Esters and [(phen)CuRF].
Authors: Litvinas Nichole D. , Fier Patrick S. , Hartwig John F. 
Published: May 2012

AbstractA wide range of aryl perfluoroalkanes is synthesized from arenes (I) and aryl bromides (IV) via in situ generated aryl boronate esters which undergo subsequent perfluoroalkylation in air with (phen)CuR (II).
ChemInform Abstract: Re2O7‐Catalyzed Three‐Component Synthesis of Protected Secondary and Tertiary Homoallylic Amines.
Authors: Pramanik Suman , Ghorai Prasanta 
Published: May 2012

AbstractA mild, chemoselective, open‐flask, and one‐pot protocol for the synthesis of the title compounds (IV), (VI), (VIII), and (X) is presented.
ChemInform Abstract: Selective Copper‐Promoted Cross‐Coupling Reaction of Anilines and Alkylboranes.
Authors: Naya Leticia , Larrosa Marta , Rodriguez Ramon , Cruces Jacobo 
Published: May 2012

AbstractOptimized conditions for the Cu‐catalyzed coupling of trialkylboranes (slight excess), generated in solution from styrenes and BH3·THF, with anilines are developed to allow the synthesis of highly functionalized substituted N‐phenylethyl‐anilines.
ChemInform Abstract: Polymeric PEG35k‐Pd Nanoparticles: Efficient and Recyclable Catalyst for Reduction of Nitro Compounds.
Authors: Yadav Veena , Gupta Shweta , Kumar Rupesh , Singh Gajendra , Lagarkha Rekha 
Published: May 2012

AbstractThe conditions render possible the preparation of various functionalized anilines.
ChemInform Abstract: A PdCl2—Ionic Liquid Brush Assembly: An Efficient and Reusable Catalyst for Mizoroki—Heck Reaction in Neat Water.
Authors: Shi Xianying , Han Xiaoyan , Ma Wenjuan , Fan Juan , Wei Junfa 
Published: May 2012

AbstractAddition of a phase‐transfer catalyst is avoided and the reaction can also be performed under aerobic conditions.
ChemInform Abstract: Oxidative Cross‐Esterification of Dithiolanes with Alcohols Through a Cross‐Dehydrogenative Coupling (CDC)/Deprotection Sequence.
Authors: Fu Liang , Yao Chang‐Jiang , Chang Ning‐Jie , Chen Jia‐Rong , Lu Liang‐Qiu , Xiao Wen‐Jing 
Published: May 2012

AbstractThe one‐pot cross‐dehydrogenative coupling—deprotection of dithiolanes with primary and secondary alcohols proceeds smoothly in the presence of CuI as catalyst to give the corresponding carboxylic esters in high yields.
ChemInform Abstract: Rh(I)‐Catalyzed Asymmetric 1,2‐Addition to α‐Diketones with Chiral Sulfur—Alkene Hybrid Ligands.
Authors: Feng Xiangqing , Nie Yanzhao , Yang Jing , Du Haifeng 
Published: May 2012

AbstractThe sulfur derivative SAH efficiently promotes the process to produce a number of tertiary α‐hydroxy ketones with good to high enantioselectivity.
ChemInform Abstract: N‐Directing Group Assisted Rhodium‐Catalyzed Aryl C—H Addition to Aryl Aldehydes.
Authors: Li Yang , Zhang Xi‐Sha , Chen Kang , He Ke‐Han , Pan Fei , Li Bi‐Jie , Shi Zhang‐Jie 
Published: May 2012

AbstractArenes containing a quinoline‐2‐yl unit undergo efficient direct C—H addition to aromatic aldehydes to afford diarylmethanols.
ChemInform Abstract: A Mild, Highly Efficient Addition of Alkynes to Aldehydes Catalyzed by Titanium Dioxide‐Supported Silver Nanoparticles.
Authors: Yu Min , Wang Yong , Sun Weijiang , Yao Xiaoquan 
Published: May 2012

AbstractSilver nanoparticles supported on TiO2 are used as a highly efficient catalyst for the preparation of propargylic alcohols (III).
ChemInform Abstract: Ruthenium‐Catalyzed Regioselective Cyclization of Aromatic Ketones with Alkynes: An Efficient Route to Indenols and Benzofulvenes.
Authors: Chinnagolla Ravi Kiran , Jeganmohan Masilamani 
Published: May 2012

AbstractThe title reactions are catalyzed by Ru(II)/Ag(I)/Cu(II) mixtures.
ChemInform Abstract: Synthesis of Dihydrofuran‐Fused Perhydrophenanthrenes Having a Phenolic Hydroxyl Group as a Novel anti‐Alzheimer′s Disease Agent.
Authors: Sugimoto Kenji , Tamura Kosuke , Ohta Naoki , Tohda Chihiro , Toyooka Naoki , Nemoto Hideo , Matsuya Yuji 
Published: May 2012

AbstractNovel mono‐protected catechol derivatives of perhydrophenanthrene are synthesized utilizing hypervalent iodine oxidation and original o‐quinodimethane chemistry of benzocyclobutenes.
ChemInform Abstract: Synthesis of Highly Functionalized Chiral 3,3′‐Disubstituted Oxindoles via an Organocatalytic Enantioselective Michael Addition of Nitroalkanes to Indolylidenecyanoacetates.
Authors: Liu Lu , Wu Deyan , Zheng Shu , Li Tengfei , Li Xiangmin , Wang Sinan , Li Jian , Li Hao , Wang Wei 
Published: May 2012

AbstractThe method allows the synthesis of a broad spectrum of title compounds, which have a high potential in diversity‐oriented synthesis and drug development.
ChemInform Abstract: Chemistry of Indoles. Part 137. Rearrangement Reaction of 1‐Ethoxy‐ and 1‐Hydroxy‐2‐phenylindole.
Authors: Yamada Koji , Somei Masanori 
Published: May 2012

AbstractPhotoirradiation of 1‐ethoxy‐2‐phenylindole (I) and reaction of 1‐hydroxy‐2‐phenylindole with tosyl chloride provides 6‐ethoxy‐ (IV) and 6‐tosyloxy‐2‐phenylindole (VIII), resp., as minor products.
ChemInform Abstract: Synthesis of N‐Azolylindoles by Copper‐Catalyzed C—H/N—H Coupling—Annulation Sequence of o‐Alkynylanilines.
Authors: Oda Yoshiro , Hirano Koji , Satoh Tetsuya , Miura Masahiro 
Published: May 2012

AbstractThe method provides a new method to prepare various biologically important N‐azolylindoles.
ChemInform Abstract: Deprotection of 3,4‐Dimethoxybenzyl (3,4DMB) Group on γ‐Lactam Nitrogen Using Phenyliodine(III) Bis(trifluoroacetate) (PIFA): Application to Isoindolinone Compounds.
Authors: Watanabe Kazuhiro , Shibata Hiroaki , Imai Yu , Katoh Tadashi 
Published: May 2012

AbstractThe dimethoxybenzyl group represents an optimal protective group for the secondary amide (γ‐lactam) moiety of an isoindolinone ring with an extraordinarily high polarity and difficult handling characteristics.
ChemInform Abstract: Rhodium Catalyzed C—H Olefination of N‐Benzoylsulfonamides with Internal Alkenes.
Authors: Zhu Chen , Falck John R. 
Published: May 2012

AbstractThe title reaction proceeds via C—H olefination of benzoylsulfonamides (I) followed by C—N bond formation leading to 3,3‐disubstituted isoindolinones, e.g. (III).
ChemInform Abstract: An Original Route to Newly‐Functionalized Indoles and Carbazoles Starting from the Ring‐Opening of Nitrothiophenes.
Authors: Bianchi Lara , Giorgi Gianluca , Maccagno Massimo , Petrillo Giovanni , Scapolla Carlo , Tavani Cinzia 
Published: May 2012

AbstractNucleophilic addition of indole to nitroolefins gives the expected Michael‐type adducts (III) and (VI) as well as the carbazoles (IX) and (X).
ChemInform Abstract: Synthesis, Antitubercular Evaluation and 3D‐QSAR Study of N‐Phenyl‐3‐(4‐fluorophenyl)‐4‐substituted Pyrazole Derivatives.
Authors: Khunt R. C. , Khedkar V. M. , Chawda R. S. , Chauhan N. A. , Parikh A. R. , Coutinho E. C. 
Published: May 2012

AbstractA variety of substituted pyrazole derivatives is synthesized starting from chalcones (III).
ChemInform Abstract: Cheap Cu(I)/Hexamethylenetetramine (HMTA) Catalytic System for C—N Coupling Reactions.
Authors: Cao Changsheng , Lu Zhongbo , Cai Zhengyuan , Pang Guangsheng , Shi Yanhui 
Published: May 2012

AbstractAryl halides bearing electron‐donating or ‐withdrawing groups can be used in combination with urotropin and CuCl or CuI.
ChemInform Abstract: A Green Route for the One‐Pot Synthesis of 1,2‐Disubstituted Benzimidazoles Using Iron(III) Phosphate under Solventless Conditions.
Authors: Behbahani F. K. , Ziaei Parisa 
Published: May 2012

AbstractThe catalyst can be recycled by filtration and reused without appreciable loss of activity.
ChemInform Abstract: Multicomponent Click Synthesis of Potentially Biologically Active Triazoles Catalyzed by Copper Nanoparticles on Activated Carbon in Water.
Authors: Alonso Francisco , Moglie Yanina , Radivoy Gabriel , Yus Miguel 
Published: May 2012

AbstractThe preparation of triazole derivatives of phenacetin, lactic acid, (‐)‐menthol, cholesterol and D‐glucose is reported.
ChemInform Abstract: Copper‐Catalyzed Synthesis of 4‐Aryl‐1H‐1,2,3‐triazoles from 1,1‐Dibromoalkenes and Sodium Azide.
Authors: Wang Xiaokun , Kuang Chunxiang , Yang Qing 
Published: May 2012

AbstractThe optimized conditions using sodium ascorbate as promoter are compatible with a number of functional groups at the dibromo(aryl)alkenes.
ChemInform Abstract: Synthesis of 8‐Hydroxyisochromenes and 8‐Hydroxyisocoumarins from 3‐Ethoxycyclohex‐2‐en‐1‐one.
Authors: Majetich George , Grove Jeremy L. 
Published: May 2012

AbstractTwo alternative strategies for the synthesis of 8‐hydroxyisocoumarins from substituted 3‐ethoxycyclohexenones are developed.
ChemInform Abstract: Chiba‐G‐Catalyzed Intramolecular oxo‐Michael Addition: Synthetic Approaches to Vitamin E Skeleton.
Authors: Tokunou Sayaka , Nakanishi Waka , Kagawa Natsuko , Kumamoto Takuya , Ishikawa Tsutomu 
Published: May 2012

AbstractChroman (IX) is prepared by an intramolecular oxo‐Michael addition reaction of unsaturated ester (VIII) in the presence of a chiral imidazolidine catalyst.
ChemInform Abstract: 4′‐Bromo‐5,6,7‐trimethoxyflavone (IVb) Represses Lipopolysaccharide‐Induced iNOS and COX‐2 Expressions by Suppressing the NF‐ϰB Signaling Pathway in RAW 264.7 Macrophages.
Authors: Lee Yong Sup , et al. et al. 
Published: May 2012

AbstractVarious analogues of baicalein and oroxylin A, flavones (IV) and (V), are synthesized with the aim to obtain derivatives that more potently inhibit the LPS‐induced production of inflammatory mediators in RAW 264.7 cells.
ChemInform Abstract: FeCl3—SiO2 as Heterogeneous Catalysts for the Preparation of Dihydropyrano[3,2‐b]chromenediones.
Authors: Li Wei‐Lin , Liang Jin‐Ying , Wang Tian‐Bao , Wang Ya‐Qin 
Published: May 2012

AbstractFerric chloride on silica is used for the condensation of kojic acid, dimedone, and aromatic aldehydes under neat conditions.
ChemInform Abstract: Synthesis, Docking and in vitro Antimalarial Evaluation of Bifunctional Hybrids Derived from β‐Lactams and 7‐Chloroquinoline Using Click Chemistry.
Authors: Singh Pardeep , Singh Parvesh , Kumar Malkeet , Gut Jiri , Rosenthal Philip J. , Kumar Kewal , Kumar Vipan , Mahajan Mohinder P. , Bisetty Krishna 
Published: May 2012

Abstract1,2,3‐Triazole tethered β‐lactam and 7‐chloroquinoline bifunctional hybrids are synthesized using Huisgen′s 1,3‐dipolar cycloaddition and screened as potential antimalarial agents.
ChemInform Abstract: Quinoline‐Fused Heterocycles from Intramolecular Cycloaddition Reactions.
Authors: Cremonesi Giuseppe , Dalla Croce Piero , Gallanti Maddalena , La Rosa Concetta 
Published: May 2012

AbstractA variety of ring‐fused quinoline heterocycles [(V), (VII), (XIII), and (XIX)] is prepared by intramolecular 1,3‐dipolar cycloaddition reactions.
ChemInform Abstract: Iterative One Pot Reactions of a Chiral Sulfamidate with 2,4,6‐Trichloropyridine: Regiocontrolled Synthesis of Linear and Angular Chiral Dipyrrolidino Pyridines.
Authors: Hebeisen Paul , Alker Andre , Buerkler Markus 
Published: May 2012

AbstractThe method provides a rapid entry into linear and angular dipyrrolidinopyridines carrying functional groups which are useful for further derivatizations.
ChemInform Abstract: Organocatalytic Enantioselective Synthesis of 2,3‐Dihydropyridazines
Authors: Fernandez Maitane , Vicario Jose L. , Reyes Efraim , Carrillo Luisa , Badia Dolores 
Published: May 2012

Abstractby reaction of hydrazone (I) with unsaturated aldehydes (II)
ChemInform Abstract: A One‐Pot Green Synthesis of 3,4 Dihydropyrimidin‐2‐(1H)‐ones/Thiones Catalyzed by MgO—ZrO2 under Solvent‐Free Conditions.
Authors: Gawande Manoj B. , Nagrik Deepak M. , Ambhore Damodar M. 
Published: May 2012

AbstractThe synthesis of the title compounds via a three‐component one‐pot reaction can be efficiently promoted by MgO—ZrO2.
ChemInform Abstract: Expedient Synthesis of 3,4‐Dihydroquinazolines via Tandem Addition—Conjugate Addition Cyclization of Carbodiimides Bearing a Michael Acceptor.
Authors: Saito Takao , Nakano Hayato , Terada Hidenori , Kutsumura Noriki , Otani Takashi 
Published: May 2012

AbstractThe reaction of carbodiimides (VII) with malonate (VIIIa) or cyanoacetate (VIIIb) leads selectively to 3,4‐dihydroquinazolines (IX) in most cases.
ChemInform Abstract: A Facile One‐Pot Synthesis of Sulfur‐Linked Thieno[1,2,4]triazolo[4,3‐c]pyrimidine Derivatives Containing Phenylpyrazole or Thienopyrimidinylpyrazole Moiety.
Authors: Whang Jina , Song Yang‐Heon 
Published: May 2012

AbstractThe title compounds are evaluated for their antibacterial effects against E.
ChemInform Abstract: Highyl Efficient Thermal Cyclization Reactions of Alkylidene Esters in Continuous Flow to Give Aromatic/Heteroaromatic Derivatives.
Authors: Lengyel Laszlo , Nagy Tibor Zs. , Sipos Gellert , Jones Richard , Dorman Gyoergy , Uerge Laszlo , Darvas Ferenc 
Published: May 2012

AbstractGould—Jacobs and Conrad—Limpach‐type thermal cyclization and benzannulation reactions are investigated from readily prepared functional precursors using a high pressure and high temperature flow reactor system with very short residence times.