Novel synthesis of enamines by iridium-catalyzed dehydrogenation of tertiary aminesElectronic supplementary information (ESI) available: detailed experimental procedures and spectroscopic information. See http://www.rsc.org/suppdata/cc/b3/b304357f/
We developed a simple and efficient strategy to access N-vinyl secondary amines of various naturally occurring materials using readily available solid acetylene reagents (calcium carbide, KF, and KOH). Pyrrole, pyrazole, indoles, carbazoles, and diarylamines were successfully vinylated in good yields. Cross-linked and linear polymers were synthesized from N-vinyl carbazoles through free radical and
Phosphine-Catalyzed Vinylation at Low Acetylene Pressure
作者:Nikolai A. Sitte、Maximilian Menche、Pavel Tužina、Frank Bienewald、Ansgar Schäfer、Peter Comba、Frank Rominger、A. Stephen K. Hashmi、Thomas Schaub
DOI:10.1021/acs.joc.1c01807
日期:2021.9.17
The vinylation of various nucleophiles with acetylene at a maximum pressure of 1.5 bar is achieved by organocatalysis with easily accessible phosphines like tri-n-butylphosphine. A detailed mechanistic investigation by quantum-chemical and experimental methods supports a nucleophilic activation of acetylene by the phosphine catalyst. At 140 °C and typically 5 mol % catalyst loading, cyclic amides,
与乙炔各种亲核试剂在1.5巴的最大压力的乙烯化是通过用有机催化方便膦等三-实现ñ丁基膦。通过量子化学和实验方法进行的详细机理研究支持膦催化剂对乙炔的亲核活化。在 140 °C 和通常 5 mol% 催化剂负载下,环酰胺、恶唑烷酮、脲、不饱和环胺和醇成功乙烯基化。此外,乙烯基鏻物种的原位生成也可用于醛的 Wittig 型官能化。
High α-regioselectivity in the rhodium-catalyzed hydroformylation of vinylpyrroles
The Rh4(CO)12-catalyzed hydroformylation at low temperature (40°C) of the 1-, 2- and 3-vinylpyrrole gives the corresponding branched aldehydes 2-(1-pyrrolyl)propanal, 2-(2-pyrollyl)propanal and 2-(3-pyrrolyl)propanal with high α-regioselectivity.
2-Arylazo-1-vinylpyrroles: A Novel Promising Family of Reactive Dyes
作者:Boris A. Trofimov、Elena Yu. Schmidt、Al’bina I. Mikhaleva、Alexander M. Vasil’tsov、Alexey B. Zaitsev、Natalia S. Smolyanina、Elena Yu. Senotrusova、Andrey V. Afonin、Igor’ A. Ushakov、Konstantin B. Petrushenko、Olga N. Kazheva、Oleg A. Dyachenko、Vladimir V. Smirnov、Alexander F. Schmidt、Marina V. Markova、Ludmila V. Morozova
DOI:10.1002/ejoc.200600357
日期:2006.9
pyrrole and the benzene ring, and is indicative of highly polarizable and tunable chromophores. X-ray, 1H NMR spectroscopic and quantum chemical studies [B3LYP/6-311 (d,p)] show the E,anti,anti isomer of the dyes to be the most stable under normal conditions. The dyes are reversibly protonated and complex to BF3 with a color change. Their copolymerization across the vinyl group affords intrinsically colored
Synthesis of Vinyl Monomers With Active Azaaromatic Groups. Phase-transfer Catalytic Approach
作者:Dariusz Bogdal、Krzysztof Jaskot
DOI:10.1080/00397910008086974
日期:2000.9
Abstract An efficient method based on the alkylation-elimination reactions under solid-liquid phase transfer-catalysis conditions (S/L PTC) is reported for the preparation of N-vinyl derivatives of azaheterocyclic compounds.