Wen S, Chen Y, Tian Q, Zhang Y, Cheng G. Transition-Metal-, Additive-, and Solvent-Free [3 + 3] Annulation of RCF
2-Imidoyl Sulfoxonium Ylides with Cyclopropenones to Give Multifunctionalized CF
3-Pyridones.
J Org Chem 2021;
87:1124-1132. [PMID:
34965129 DOI:
10.1021/acs.joc.1c02464]
[Citation(s) in RCA: 16] [Impact Index Per Article: 5.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/27/2022]
Abstract
An efficient and practical strategy was developed to synthesize 1,3,4-triaryl-6-trifluoromethylpyridones from CF3-imidoyl sulfoxonium ylides and cyclopropenones in good to excellent yields. This stepwise [3 + 3] annulation reaction was carried out under transition-metal-, additive-, and solvent-free conditions, generating 1 equiv of dimethyl sulfoxide as byproduct and tolerating a series of functional groups.
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