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Copper‐Catalyzed Highly Stereoselective Trifluoromethylation and Difluoroalkylation of Secondary Propargyl Sulfonates
Author(s) -
Gao Xing,
Xiao YuLan,
Wan Xiaolong,
Zhang Xingang
Publication year - 2018
Publication title -
angewandte chemie
Language(s) - English
Resource type - Journals
eISSN - 1521-3757
pISSN - 0044-8249
DOI - 10.1002/ange.201711463
Subject(s) - trifluoromethylation , propargyl , stereospecificity , chemistry , stereoselectivity , regioselectivity , trifluoromethyl , combinatorial chemistry , optically active , catalysis , organic chemistry , alkyl
It is challenging to stereoselectively introduce a trifluoromethyl group (CF 3 ) into organic molecules. To date, only limited strategies involving direct asymmetric trifluoromethylation have been reported. Herein, we describe a new strategy for direct asymmetric trifluoromethylation through the copper‐catalyzed stereospecific trifluoromethylation of optically active secondary propargyl sulfonates. The reaction enables propargylic trifluoromethylation with high regioselectivity and stereoselectivity. The reaction could also be extended to stereospecific propargylic difluoroalkylation. Transformations of the resulting enantiomerically enriched fluoroalkylated alkynes led to a variety of chiral fluoroalkylated compounds, thus providing a useful protocol for applications in the synthesis of fluorinated complexes.