bluuebunny/crossref_metadata_2025_split huggingface dataset:
Silicon chemistry in the mesosphere and lower thermosphere
Authors: Plane John M. C. , Gómez‐Martín Juan Carlos , Feng Wuhu , Janches Diego 
Published: March 2016

AbstractSilicon is one of the most abundant elements in cosmic dust, and meteoric ablation injects a significant amount of Si into the atmosphere above 80 km. In this study, a new model for silicon chemistry in the mesosphere/lower thermosphere is described, based on recent laboratory kinetic studies of Si, SiO, SiO2, and Si+. Electronic structure calculations and statistical rate theory are used to show that the likely fate of SiO2 is a two‐step hydration to silicic acid (Si(OH)4), which then polymerizes with metal oxides and hydroxides to form meteoric smoke particles. This chemistry is then incorporated into a whole atmosphere chemistry‐climate model. The vertical profiles of Si+ and the Si+/Fe+ ratio are shown to be in good agreement with rocket‐borne mass spectrometric measurements between 90 and 110 km. Si+ has consistently been observed to be the major meteoric ion around 110 km; this implies that the relative injection rate of Si from meteoric ablation, compared to metals such as Fe and Mg, is significantly larger than expected based on their relative chondritic abundances. Finally, the global abundances of SiO and Si(OH)4 show clear evidence of the seasonal meteoric input function, which is much less pronounced in the case of other meteoric species.
Statistical‐dynamical seasonal forecast of western North Pacific and East Asia landfalling tropical cyclones using the high‐resolution GFDL FLOR coupled model
Authors: Zhang Wei , Villarini Gabriele , Vecchi Gabriel A. , Murakami Hiroyuki , Gudgel Richard 
Published: March 2016

AbstractThis study examines the seasonal prediction of western North Pacific [WNP) and East Asia landfalling tropical cyclones (TCs) using the Geophysical Fluid Dynamics Laboratory(GFDL) Forecast‐oriented Low Ocean Resolution version of CM2.5 with Flux Adjustment (FLOR‐FA) and finite‐mixture‐model (FMM)‐based statistical cluster analysis. Using the FMM‐based cluster analysis, seven clusters are identified from the historical and FLOR‐FA‐predicted TC tracks for the period 1980–2013. FLOR‐FA has significant skill in predicting year‐to‐year variations in the frequency of TCs within clusters 1 (recurving TCs) and 5 (straight‐moving TCs). By building Poisson regression models for each cluster using key predictors (i.e., sea surface temperature, 500 hPa geopotential height, and zonal vertical wind shear), the predictive skill for almost all the clusters at all initialization months improves with respect to the dynamic prediction. The prediction of total WNP TC frequency made by combining hybrid predictions for each of the seven clusters in the hybrid model shows skill higher than what achieved using the TC frequency directly from FLOR‐FA initialized from March to July. However, the hybrid predictions for total WNP TC frequency initialized from January to February exhibit lower skill than FLOR‐FA. The prediction of TC landfall over East Asia made by combining the hybrid models of TC frequency in each cluster and its landfall rate over East Asia also outperforms FLOR‐FA for all initialization months January through July.
A membrane‐bound esterase PA2949 from Pseudomonas aeruginosa is expressed and purified from Escherichia coli
Authors: Kovacic Filip , Bleffert Florian , Caliskan Muttalip , Wilhelm Susanne , Granzin Joachim , Batra‐Safferling Renu , Jaeger Karl‐Erich 
Published: March 2016

Pseudomonas aeruginosa strain 1001 produces an esterase (EstA) that can hydrolyse the racemic methyl ester of β‐acetylthioisobutyrate to produce the (D)‐enantiomer, which serves as a precursor of captopril, a drug used for treatment of hypertension. We show here that PA2949 from P. aeruginosa PA01, a homologue of EstA, can efficiently be expressed in an enzymatically active form in E. coli. The enzyme is membrane‐associated as demonstrated by cell fractionation studies. PA2949 was purified to homogeneity after solubilisation with the nonionic detergent, Triton X‐100, and was shown to possess a conserved esterase catalytic triad consisting of Ser137–His258–Asp286. Our results should allow the development of an expression and purification strategy to produce this biotechnologically relevant esterase in a pure form with a high yield.
Efficient and Scalable Kinetic Resolution of Racemic 4‐Formyl[2.2]paracyclophane via Asymmetric Transfer Hydrogenation
Authors: Delcourt Marie‐Léonie , Turcaud Serge , Benedetti Erica , Micouin Laurent 
Published: March 2016

AbstractHerein we wish to report a new non‐enzymatic kinetic resolution of racemic 4‐formyl[2.2]paracyclophane based on Noyori asymmetric transfer hydrogenations (KR‐ATH). Our approach, which provides an efficient access to enantiopure (Rp)‐ and (Sp)‐4‐formyl[2.2]paracyclophane (>99% ee, 39% and 41% isolated yields, respectively), is operationally simple and can be run on the gram‐scale thus confirming the practical applicability of this method.magnified image
Copper‐Catalyzed or ‐Mediated CH Bond Functionalizations Assisted by Bidentate Directing Groups
Authors: Liu Jidan , Chen Guoshu , Tan Ze 
Published: March 2016

AbstractCopper salts, which are abundant, relatively inexpensive and possess low toxicity, have long been used as versatile catalysts for various reactions in organic synthesis. Recently, the development of Cu‐catalyzed or ‐mediated CH functionalization reactions has gained significant attention. Since the pioneering work of Daugulis on the introduction of 8‐aminoquinoline and picolinic acid auxiliaries as removable directing groups in transition metal‐catalyzed CH bond activations, the combination of copper salts with these bidentate directing groups has emerged as an innovative strategy for the construction of carbon‐carbon or carbon‐heteroatom bonds through CH bond cleavage. In addition to the 8‐aminoquinoline and picolinamide systems, several other bidentate directing groups including the 2‐aminophenyloxazoline group by Yu and Dai and the PIP system by Shi, have been developed as well. This review intends to cover most of the recent advances on copper‐catalyzed or ‐mediated direct sp2 and sp3 CH bond functionalizations assisted by these bidentate directing groups. The major achievements in this area are discussed and catalogued by the type of bonds formed (CC, CO, CN, CS, CP etc.). Special attention is paid to the reaction mechanisms. Selected examples of substrates are listed as well. In addition, a personal outlook is given at the end.magnified image
Exploration of Mechanisms behind Changes after Participation in a Parenting Intervention: A Qualitative Study in a Low‐Resource Setting
Authors: Mejia Anilena , Ulph Fiona , Calam Rachel 
Published: March 2016

AbstractParenting interventions are effective for preventing psychological difficulties in children. However, their active ingredients have not been comprehensively explored. How do they work? What are the mechanisms operating behind changes? In 2012, a randomized controlled trial of a parenting intervention was conducted in low‐resource communities of Panama. Effects on child behavioral difficulties, parental stress, and parenting practices were large in the short and long term. This was an ideal opportunity to explore potential mechanisms operating behind effects found in this low‐resource setting. Twenty‐five parents were interviewed. Data were analyzed through an inductive semantic thematic analysis. Three themes emerged from the data: (a) psychological mechanisms behind changes, (b) behavioral changes in parent, and (c) changes in the children. Parents described that the intervention triggered changes in emotion regulation, self‐efficacy, and problem solving. Parents also reported behavioral changes such as praising their children more often, who in turn seemed more responsible and better at following instructions. The study offers participant‐driven insight into potential pathways of change after participation in this parenting intervention, pathways that are often overlooked in quantitative studies. Future studies should further explore these pathways, through mediator and moderator analyses, and determine how much is shared across interventions and across different cultural settings.
1‐Naphthol Synthesis through Base‐Promoted SNAr Reactions of ortho‐Haloacetophenones Followed by Lewis‐Acid‐Catalyzed Cyclization
Authors: Yu Xiaoqiang , Zhu Peihong , Bao Ming , Yamamoto Yoshinori , Almansour Abdulrahman I. , Arumugam Natarajan , Kumar Raju Suresh 
Published: March 2016

AbstractAn efficient method was developed for the synthesis of 1‐naphthols through NaOtBu‐promoted SNAr reaction of ortho‐haloacetophenones followed by Lewis acid CuI‐catalyzed intramolecular condensation and isomerization. 1‐Naphthol derivatives were obtained in satisfactory yields from aryl bromide and aryl iodide substrates.
Oxidative Remote C−H Trifluoromethylation of Quinolineamides on the C5 Position with Iodobenzene Diacetate as the Oxidizing Agent
Authors: Wu Zhaoyang , He Yongqin , Ma Chaowei , Zhou Xiaoqiang , Liu Xingxing , Li Yamin , Hu Ting , Wen Ping , Huang Guosheng 
Published: March 2016

AbstractA facile, metal‐free protocol has been developed for the remote trifluoromethylation of 8‐aminoquinoline scaffolds on the C5 position, which is difficult to functionalize. In this method, 8‐aminoquinolineamides reacted with an inexpensive and commercially available CF3 source (Langlois reagent) to give a wide range of trifluoromethylated aminoquinolineamides.
Rekombinante Cyanobakterien für die asymmetrische Reduktion von C=C‐Bindungen mithilfe biokatalytischer Wasseroxidation
Authors: Köninger Katharina , Gómez Baraibar Álvaro , Mügge Carolin , Paul Caroline E. , Hollmann Frank , Nowaczyk Marc M. , Kourist Robert 
Published: March 2016

AbstractEine in Cyanobakterien exprimierte, rekombinante Enoat‐Reduktase wurde für die lichtkatalysierte, enantioselektive Reduktion von C=C‐Bindungen genutzt. Dabei ermöglicht die Kopplung von Oxidoreduktasen an die natürliche Photosynthese eine durch Wasseroxidation angetriebene asymmetrische Synthese. Durch den Verzicht auf zusätzliche Cosubstrate als Elektronendonoren wird die Bildung unerwünschter Nebenprodukte gemindert und die Atomökonomie der Reaktion erhöht. Die Verfügbarkeit von NADPH und die Menge an aktivem Enzym in der Zelle sind entscheidende Faktoren für die Produktbildung. Die Effizienz der Reaktion ist mit derjenigen typischer Ganzzell‐Biotransformationen in E. coli vergleichbar: Unter optimierten Bedingungen wurden 100 mg prochirales 2‐Methylmaleimid zu enantiomerenreinem 2‐Methylsuccinimid (99 % ee, 80 % Ausbeute an isoliertem Produkt) reduziert. Die hohen Produktausbeuten und die exzellente Enantiomerenreinheit durch den Einsatz rekombinanter Cyanobakterien in einer lichtgetriebenen Ganzzell‐Biotransformation ergeben einen einfachen und allgemein anwendbaren Syntheseansatz.
Stereoselective Formation of Fully Substituted Ketone Enolates
Authors: Haimov Elvira , Nairoukh Zackaria , Shterenberg Alexander , Berkovitz Tiran , Jamison Timothy F. , Marek Ilan 
Published: March 2016

AbstractThe application of stereochemically defined acyclic fully substituted enolates of ketones to the enantioselective synthesis of quaternary carbon stereocenters would be highly valuable. Herein, we describe an approach leading to the formation of several new stereogenic centers through a combined metalation–addition of a carbonyl–carbamoyl transfer to reveal in situ stereodefined α,α‐disubstituted enolates of ketone as a single stereoisomer. This approach could produce a series of aldol and Mannich products from enol carbamate with excellent diastereomeric ratios.
Functional characterization of CYP52G3 from Aspergillus oryzae and its application for bioconversion and synthesis of hydroxyl flavanone and steroids
Authors: Uno Tomohide , Yanase Takeshi , Imaishi Hiromasa 
Published: March 2016

AbstractAspergillus oryzae is a fungus widely used in traditional Japanese fermentation industries. Cytochrome P450 (CYP) proteins are ubiquitously distributed in nature and display a broad range of enzymatic activities. A novel CYP52 (CYP52G3) gene was found in A. oryzae. In this study, we report the functional characterization of CYP52G3. The recombinant protein was expressed heterologously in Escherichia coli, and its membrane fraction isolated. CYP52G3 showed activities for 7‐ethoxycoumarin and α‐naphtoflavone. Furthermore, CYP52G3 hydroxylated flavanone at the 4′ and 6 position and metabolized some hydroxyl‐flavanones and steroids. Bioconversion experiments indicated that CYP52G3 could convert flavanone and testosterone in a synthetic medium. The conversion rates of flavanone and testosterone at 24 H were 50% and 70%, respectively. These results support that CYP52G3 could prove a useful enzyme for the efficient production of new compounds from flavonoids and steroids.
Reliability and reproducibility of individual differences in functional connectivity acquired during task and resting state
Authors: Shah Lubdha M. , Cramer Justin A. , Ferguson Michael A. , Birn Rasmus M. , Anderson Jeffrey S. 
Published: March 2016

AbstractObjectivesApplication of fMRI connectivity metrics as diagnostic biomarkers at the individual level will require reliability, sensitivity and specificity to longitudinal changes in development, aging, neurocognitive, and behavioral performance and pathologies. Such metrics have not been well characterized for recent advances in BOLD acquisition.Experimental DesignAnalysis of multiband BOLD data from the HCP 500 Subjects Release was performed with FIX ICA and with WM, CSF and motion parameter regression. Analysis with ROIs covering the gray matter at 5 mm resolution was performed to assess functional connectivity. ROIs in key areas were used to demonstrate statistical differences between specific connections. Reproducibility of group‐mean functional connectivity and for single connections for individuals was evaluated for both resting state and task acquisitions.Principal ObservationsSystematic differences in group‐mean connectivity were demonstrated during task and rest and during different tasks, although individual differences in connectivity were maintained. Reproducibility of a single connection for a subject and across subjects for resting and task acquisition was demonstrated to be a linear function of the square root of imaging time. Randomly removing up to 50% of time points had little effect on reliability, while truncating an acquisition was associated with decreased reliability. Reliability was highest within the cortex, and lowest for deep gray nuclei, gray‐white junction, and near large sulci.ConclusionsThis study found systematic differences in group‐mean connectivity acquired during task and rest acquitisions and preserved individual differences in connectivity due to intrinsic differences in an individual's brain activity and structural brain architecture. We also show that longer scan times are needed to acquire data on single subjects for information on connections between specific ROIs. Longer scans may be facilitated by acquisition during task paradigms, which will systematically affect functional connectivity but may preserve individual differences in connectivity on top of task modulations.
Understanding Protein–Protein Interactions: Essential Players in (Patho)physiology (Part 1)
Authors: Wilson Andrew J. , Gunning Patrick T. 
Published: March 2016

AbstractThis is the first of a two‐part Editorial by the Guest Editors of the ChemBioChem and ChemMedChem joint Special Issue on Protein–Protein Interactions. Part 2 can be accessed via http://dx.doi.org/10.1002/cmdc.201600158; the complete issue can be viewed here: bit.ly/cbcVIppi.
Plaque morphology predictors of side branch occlusion after provisional stenting in coronary bifurcation lesion: Results of optical coherence tomography bifurcation study (ORBID)
Authors: Kini Annapoorna S. , Vengrenyuk Yuliya , Pena Jacobo , Yoshimura Takahiro , Panwar Sadik R. , Motoyama Sadako , Kezbor Safwan , Hasan Choudhury M. , Palkhiwala Sameet , Kovacic Jason C. , Moreno Pedro , Baber Usman , Mehran Roxana , Narula Jagat , Sharma Samin K. 
Published: March 2016

ObjectivesThe aim of this study was to identify the predictors of side branch (SB) ostial stenosis developed after provisional stenting of the main vessel (MV) using optical coherence tomography (OCT).BackgroundProvisional stenting remains the main approach to treatment of bifurcation lesions; however, it may result in the narrowing of SB ostium. There is little information about underlying plaque morphology of the MV lesion and its potential impact on the SB after provisional stenting.MethodsPatients with stable coronary disease with angiographic MV lesion not involving SB were included in a prospective single center study. The primary outcome was significant SB ostium stenosis (SBOS), defined as residual stenosis of >50% after MV stenting.ResultsThirty bifurcation lesions in 30 patients were analyzed in the study. Poststenting significant SBOS was observed in 30% of patients. The MV lesions with SBOS > 50% were characterized by a higher prevalence of lipid rich plaques (100 vs. 64%, p = 0.040) and spotty calcifications (60 vs. 0%, p = 0.005). Maximal lipid arcs were greater (257° vs. 132°, p = 0.001) and lipid volume index was higher (1380 vs. 574, p = 0.012) in the SBOS >50% group. Multivariate logistic regression analysis identified maximal lipid arc (odds ratio (OR): 1.014, p = 0.038) and the presence of lipid plaque contralateral to SB ostium (OR: 8.14, p = 0.046) before stenting as independent predictors of significant SBOS after PCI.ConclusionsHigh lipid content of the MV lesion and a contralateral location of lipid in the bifurcation area may contribute to SBOS after provisional stenting. © 2016 Wiley Periodicals, Inc.
Ullmann Coupling Reaction of Nitro‐Substituted Aryl Halides with Phenols under Mild Conditions: Micro‐/Mesoporous Hierarchical LaAlPO‐5 Zeolite Catalyst
Authors: Ke Qingping , Wu Mingzhou , Wang Chao , Lu Guanzhong 
Published: March 2016

AbstractHeterogeneous catalytic reactions of aromatic organic molecules over zeolite catalysts present many challenges because of the shape selectivity of the micropores of conventional zeolites that limits the diffusion of aromatic molecules. Herein, Ullmann coupling reactions of phenols with nitro‐substituted aryl halides were catalyzed by rare‐earth‐doped mesoporous AlPO‐5 zeolites in the absence of ligands. The AlPO‐5‐MAlPO‐5‐M zeolites had a pure AFI structure and consisted of spherical particles assembled by nanofibers. The rare‐earth elements were highly dispersed in the AlPO‐5‐MAlPO‐5‐M samples. The LaAlPO‐5‐MAlPO‐5‐M zeolite is an excellent catalyst for Ullmann coupling reactions of phenols and nitro‐substituted aryl halides. Mesoporous LaAlPO‐5 has an excellent stability and recyclability in the Ullmann coupling of p‐X‐nitrobenzene (X=Cl, Br, and I) with 2‐naphthol. These results are important in the exploration of attractive Ullmann coupling reactions and in the development of mesoporous zeolite catalysts for other organic reactions.
ChemInform Abstract: ANALYSIS OF THE ELUTION CURVE IN ELUTING LUTETIUM FROM CATION‐EXCHANGER WITH α‐HYDROXYISOBUTYRIC ACID
Authors: KUBOTA MASUMITSU 
Published: March 2016

AbstractDas Verhalten von Lu bei der Elution von einer Kationenaustauschersäule mit einer sauren α‐Hydroxybuttersäurelösung (pH 3,7) wird als Funktion des Verteilungsverhältnisses von Lu in der Säule (Harz/ Lösung), der Fließgeschwindigkeit, der Temperatur und der Lu‐Menge analysiert.
ChemInform Abstract: COMPLEX CATION‐RADICAL SALTS DERIVED FROM PHENOTHIAZINE AND RELATED COMPOUNDS
Authors: DOI SUSUMU , MATSUNAGA YOSHIO 
Published: March 2016

AbstractEs wird der spezifische elektrische Widerstand z.B. eines Gemisches aus Phenothi‐i azin und seines Kationradikalbromids untersucht.
ChemInform Abstract: PHOTOCHROMIC 1,3‐BENZOXATHIOLSPIROPYRANS. SYNTHESIS AND KINETIC STUDY OF THE THERMAL DECOLORATION
Authors: APPRIOU PIERRE , GARNIER FRANCIS , GUGLIELMETTI ROBERT 
Published: March 2016

AbstractIn Gegenwart von Perchlorsäure kondensieren sich das Chinon (I) mit dem Amid (II) und den Salicylaldehyden (III) zu den Styrylderivaten (IV), die in basischem Medium zu den Spiropyranen (Va) cyclisiert werden.
ChemInform Abstract: MICHAEL REACTIONS OF α‐PHENYLTHIO AND α‐PHENYLSULFINYL CROTONIC ESTERS WITH CYCLIC ENONES
Authors: HAGIWARA HISAHIRO , NAKAYAMA KIYOSHI , UDA HISASHI 
Published: March 2016

AbstractDie Michael‐Reaktion des Crotonsäureesters (I) mit den Cyclohexenonen (II) in Gegenwart von Hexamethylphosphorsäuretriamid (HMPT) ergibt die Bicyclooctanone (III).
ChemInform Abstract: SELECTIVE CATALYTIC REDUCTION OF SUBSTITUTED ANILINES TO SUBSTITUTED CYCLOHEXYLAMINES AND OF BENZENE‐ AND PHENYLALKANESULFONIC ACIDS TO CYCLOHEXANE‐ AND CYCLOHEXYLALKANESULFONIC ACIDS
Authors: EGLI ROBERT , EUGSTER CONRAD HANS 
Published: March 2016

AbstractBei Verwendung von Rh‐Alox‐Katalysatoren lassen sich die Äther (I) unter bestimmten Bedingungen ohne starke Hydrogenolyse zu den Aminocyclohexyläthern (II) (cis‐trans‐Gemische mit überwiegend cis‐Isomeren) reduzieren.
ChemInform Abstract: FORMATIONS AND REACTIONS OF O‐BENZOQUINONE MONO‐ AND DIIMINES. I
Authors: NOGAMI TAKASHI , HISHIDA TADANORI , YAMADA MASAKAZU , MIKAWA HIROSHI , SHIROTA YASUHIKO 
Published: March 2016

AbstractDie Bildung der beiden Titelverbindungen durch Oxidatio:n von o‐Aminophenol bzw. o‐Phenylendiamin mit PbOg in Äther oder mit Hexacyanoferrat(III) in wässriger Lösung wird spektroskopisch untersucht, und die Hydrolyseempfindlichkeit der Verbindungen im pH‐Bereich 4,5‐12 wird ermittelt.
ChemInform Abstract: REACTIONS OF NITRENES WITH STRAINED OLEFINS. PREPARATION OF DIMETHYL‐N‐PHTHALIMIDYL‐5‐AZABICYCLO(2.1.0)PENTANE‐1,4‐DICARBOXYLATE
Authors: MEYER G. R. , STAVINOHA J. JUN. 
Published: March 2016

AbstractDer Cyclobutendicarbonsäureester (I) und N‐Amino‐phthalimid (II) reagieren in Methylenchlorid in Gegenwart von B1eitetraacetat zu dem Aziridinderivat (III).
ChemInform Abstract: SYNTHESES OF 2,3‐DIALKOXY‐2,3‐DIHYDROBENZO(B)FURANS
Authors: SROGI J. , JANDA M. , STIBOR I. , ROZINEK R. 
Published: March 2016

AbstractDie Elektrolyse von Benzofuranen (I) in Alkohol (II) bei ‐10°C in Gegenwart eines Elektrolyten führt zu 2,3‐Dia1koxy‐2,3‐dihydrobenzofuranen (III).
ChemInform Abstract: 1,2,3‐BENZOTRIAZIN‐4‐ONES AND RELATED SYSTEMS. IV. THERMAL DECOMPOSITION OF 3‐IMIDOYLATED 1,2,3‐BENZOTRIAZIN‐4‐ONES. NEW SYNTHESIS OF 1,2‐DIARYL‐1,4‐DIHYDROQUINAZOLIN‐4‐ONES
Authors: PATERSON T. MCC. , SMALLEY R. K. , SUSCHITZKY H. 
Published: March 2016

Abstract1,2,3‐Benzotriazin‐4‐on (I) wird mit Natriumhydrid in Dimethylformamid metalliert und mit Imidchloriden (II) zu (III) umgesetzt, deren Pyrolyse in Paraffinöl bei 300°C zu 1,2‐Diaryl‐1,4‐dihydrochinazolin‐4‐onen (IV) führt.
ChemInform Abstract: PHOTOACTION IN THE COURSE OF CHELATE FORMATION. I. LIGAND PHOTOACTIVITY IN THE BORIC ACID‐BENZOYLACETONE 1 1 INTERACTION
Authors: MARCANTONATOS M. 
Published: March 2016

AbstractDie Bildung des Borobenzoylacetonid‐ Chelats (I) aus photoaktiviertem Benzoylaceton und Borsäure in konz. Schwefelsäure/Äther‐Lösung wird kinetisch untersucht.
ChemInform Abstract: CHROMIUM(II) COMPLEXES WITH PYRAZOLES AND IMIDAZOLES AS LIGANDS
Authors: MANI F. , SCAPACCI G. 
Published: March 2016

AbstractDie Cr(II)‐ Komplexe (I)‐(III) werden durch Umsetzung von Cr(II)‐halogeniden mit den Liganden dargestellt.
ChemInform Abstract: ORGANOCOBALT CLUSTER COMPLEXES. XVIII. FRIEDEL‐CRAFTS ACYLATION OF DIARYLACETYLENEDICOBALT HEXACARBONYL COMPLEXES. DICOBALT HEXACARBONYL UNIT AS A PROTECTING GROUP FOR THE ACETYLENE FUNCTION
Authors: SEYFERTH DIETMAR , NESTLE MARA OZOLINS , WEHMAN ANTHONY T. 
Published: March 2016

AbstractDie Friedel‐Crafts Acetylierung der Acetylenkomplexe (I) erfolgt rasch und in guten Ausbeuten je nach Bedingungen und eingesetztem Molverhältnis zu den mono‐ und/oder diacetylierten Produkten (II) und (III).