Journal
ANGEWANDTE CHEMIE-INTERNATIONAL EDITION
Volume 59, Issue 38, Pages 16398-16403Publisher
WILEY-V C H VERLAG GMBH
DOI: 10.1002/anie.202006048
Keywords
copper; homogenous catalysis; deamination; difluoromethylation; pyridinium salts
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Funding
- Miami University
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The difluoromethyl group (CF2H) is considered to be a lipophilic and metabolically stable bioisostere of an amino (NH2) group. Therefore, methods that can rapidly convert an NH(2)group into a CF2H group would be of great value to medicinal chemistry. We report herein an efficient Cu-catalyzed approach for the conversion of alkyl pyridinium salts, which can be readily synthesized from the corresponding alkyl amines, to their alkyl difluoromethane analogues. This method tolerates a broad range of functional groups and can be applied to the late-stage modification of complex amino-containing pharmaceuticals.
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