Affiliation:
1. Graduate School of Science and Engineering Yamaguchi University 2-16-1 Tokiwadai, Ube Yamaguchi 755-8611 Japan
Abstract
AbstractHerein, we report a copper‐catalyzed stereospecific fluorination involving CsF and α‐bromocarboxamides as tertiary alkyl sources that, unlike traditional stereospecific routes involving stereoinversive SN2 reactions, proceeds with retention of stereochemistry. The developed stereospecific Cu‐catalyzed reaction is among the most efficient methods for synthesizing fluorinated molecules that possess highly congested stereogenic carbon centers. Mechanistic studies revealed that the combined reactivity of CuF2 and Cs salt is essential for completing the catalytic cycle. Our catalytic system underwent fluorination exclusively with tertiary alkyl bromides and did not react with primary alkyl bromides, indicating that this stereospecific fluorination methodology is suitable for synthesizing fluorinated building blocks possessing stereo‐defined F‐containing tertiary carbon stereogenic center.
Subject
General Chemistry,Catalysis
Cited by
2 articles.
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