Trifluoromethylation of Propargylic Halides and Trifluoroacetates Using (Ph<sub>3</sub>P)<sub>3</sub>Cu(CF<sub>3</sub>) Reagent
作者:Tony S. N. Zhao、Kálmán J. Szabó
DOI:10.1021/ol3017287
日期:2012.8.3
A copper-mediatedtrifluoromethylation of propargylic halides and trifluoroacetates was performed with high allenyl or propargyl selectivity. The reaction proceeds smoothly with aliphatic and aromatic substituents bearing either electron-withdrawing or -supplying groups. Preliminary mechanistic results indicate an ionic mechanism involving nucleophilic transfer of the CF3 group from the Cu complex
Reactions of propargylic halides with trifluoromethyltrimethylsilane in the presence of a catalytic amount of copper(I) thiophene-2-carboxylate (CuTC) have been found to give the corresponding trifluoromethylated products in good to high yields with a high selectivity.
Ene Reaction of <i>o</i>-Carboryne with Alkynes and Alkenes at Room Temperature: Synthesis of <i>o</i>-Carboranyl Allenes and Alkenes
作者:Jie Zhang、Zuowei Xie
DOI:10.1021/acs.orglett.1c00649
日期:2021.4.16
temperature an efficient ene reaction with a large variety of alkynes and alkenes possessing an α-CH proton to give a series of o-carboranyl allenes and alkenes in good to high isolated yields. This reaction has a broad substrate scope from alkyl and aryl to silyl substituents. This protocol provides a facile synthetic method for accessing cage C-substituted carboranyl allenes and alkenes, which may be utilized