Difluoroketenimine: Generation from Difluorocarbene and Isocyanide and Its [3 + 2] Cycloadditions with Alkenes or Alkynes
作者:Rui Zhang、Zhikun Zhang、Kang Wang、Jianbo Wang
DOI:10.1021/acs.joc.0c01120
日期:2020.8.7
Ketenimines have been explored as useful building blocks for the synthesis of heteroatom-containing cyclic compounds through the cycloaddition with polar multiplebonds. Herein, we report the cycloaddition of difluoroketenimine with nonpolar multiplebonds, namely, the cycloaddition with alkenes or alkynes. The difluoroketenimine is generated from the coupling of tert-butyl isocyanide and difluorocarbene
Oxytrifluoromethylation of multiple bonds using copper catalyst under mild conditions
作者:Hiromichi Egami、Ryo Shimizu、Mikiko Sodeoka
DOI:10.1016/j.tetlet.2012.07.134
日期:2012.10
Oxytrifluoromethylation reaction of styrene derivatives and alkynes with external and internal oxygen nucleophiles, catalyzed by copper (I) salts under mild conditions, was developed. Direct formation of a β-trifluoromethylstyrene derivative from a styrene derivative was also achieved by the reaction in the presence of a Brønsted acid. Further transformation of the oxytrifluoromethylated products was
Cu
<sup>I</sup>
‐Catalyzed Sequential Diamination and Dehydrogenation of Terminal Olefins: A Facile Approach to Imidazolinones
作者:Yingguang Zhu、Yian Shi
DOI:10.1002/chem.201404381
日期:2014.10.20
Diamination of olefins presents a powerful strategy to access vicinal diamines. During the last decade, metal‐catalyzed diamination of olefins has received considerable attention. This study describes an efficient sequential diamination and dehydrogenation process of terminalolefins with CuBr as catalyst and di‐tert‐butyldiaziridinone as nitrogen source, providing a facile and viable approach to a
Various heteroarenes, such as indole, carbazole, dibenzofuran, dibenzothiophene, etc., were easily constructed by the Diels-Alderreaction of the corresponding vinyl-substituted pyrrole, indole, be...