Journal
ORGANIC LETTERS
Volume 23, Issue 16, Pages 6352-6356Publisher
AMER CHEMICAL SOC
DOI: 10.1021/acs.orglett.1c02136
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Funding
- National Natural Science Foundation of China [21772022]
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A highly efficient and regioselective synthesis of highly substituted 2-trifluoromethyl pyrrole derivatives is reported via a silver-catalyzed cyclization of vinyl azides with ethyl 4,4,4-trifluoro-3-oxobutanoate. Various types of alpha-(heteo)aryl, alkyl, alpha-aryl, and alpha,beta-disubstituted vinyl azides can participate in this transformation. The proposed reaction mechanism involves the addition of in situ generated 2H-azirine to the diketone species, followed by intramolecular addition, N-C-1 cleavage, and elimination.
An efficient and regioselective synthesis of highly substituted 2-trifluoromethyl pyrrole derivatives via silver-catalyzed cyclization of vinyl azides with ethyl 4,4,4-trifluoro-3-oxobutanoate is reported. Various alpha-(heteo)aryl, alkyl, alpha-aryl, as well as alpha,beta-disubstituted vinyl azides, participate in this transformation. The reaction mechanism likely involves the addition of in situ generated 2H-azirine to the diketone species, followed by intramolecular addition, N-C-1 cleavage, and elimination.
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