Journal
ANGEWANDTE CHEMIE-INTERNATIONAL EDITION
Volume 61, Issue 10, Pages -Publisher
WILEY-V C H VERLAG GMBH
DOI: 10.1002/anie.202115334
Keywords
Cyclopropenol; Energy Transfer Photocatalysis; Homogeneous Catalysis; Reaction Mechanisms; Synthetic Methods
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Funding
- NSFC [21901191]
- Fundamental Research Funds for the Central Universities
- Wuhan University
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This paper reports the first synthesis of alpha-trifluoromethylated cyclopropenols through visible-light-induced organocatalysis. The method offers simple operation, mild conditions, broad substrate scope, and good functional group tolerance.
Although the synthesis of common cyclopropenes has been well studied, the access to cyclopropenols is rather limited. Herein, we report the first synthesis of alpha-trifluoromethylated cyclopropenols via 2+1 cycloaddition reactions between alkynes and trifluoroacylsilanes, enabled by visible-light-induced organocatalysis. The novel ambiphilic donor-acceptor carbenes derived from trifluoroacetylsilanes reacted efficiently with both activated and non-activated alkynes. The reaction features simple operation, mild conditions, broad substrate scope and good functional group tolerance. The synthetic potential of the reaction is highlighted by the gram-scale reactions and first synthesis of alpha-trifluoromethylated cyclopropanols through the combination of the 2+1 cyclization and high diastereoselective hydrogenation reaction in one pot.
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