Journal
ANGEWANDTE CHEMIE-INTERNATIONAL EDITION
Volume 61, Issue 6, Pages -Publisher
WILEY-V C H VERLAG GMBH
DOI: 10.1002/anie.202115098
Keywords
Asymmetric catalysis; Cycloalkanones; Diazo compounds; Scandium; Trifluoromethylation
Categories
Funding
- NSFC [91956104]
- BNLMS
- Laboratory for Synthetic Chemistry and Chemical Biology of Health@InnoHK of ITC, HKSAR
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The catalytic asymmetric trifluoromethylation of cyclic ketones via a Sc-III/chiral bisoxazoline-catalyzed homologation reaction using 2,2,2-trifluorodiazoethane (CF3CHN2) as the CF3 source is an efficient method to generate chiral alpha-trifluoromethyl cyclic ketones with excellent diastereoselectivity and enantioselectivity.
Introduction of the trifluoromethyl group (CF3) into organic molecules in an enantioselective manner has attracted significant attention, but still remains a challenging problem. We herein report a catalytic asymmetric trifluoromethylation of cyclic ketones via a Sc-III/chiral bisoxazoline-catalyzed homologation reaction by employing 2,2,2-trifluorodiazoethane (CF3CHN2) as the CF3 source. This desymmetrization process is highly efficient and generates two chiral centers with excellent diastereoselectivity and enantioselectivity, affording chiral alpha-trifluoromethyl cyclic ketones in a straightforward manner.
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