Xavier T, Condon S, Pichon C, Le Gall E, Presset M. Decarboxylative Mannich Reactions with Substituted Malonic Acid Half-Oxyesters.
J Org Chem 2021;
86:5452-5462. [PMID:
33822615 DOI:
10.1021/acs.joc.0c02895]
[Citation(s) in RCA: 4] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/21/2022]
Abstract
The decarboxylative Mannich reaction between imines and substituted malonic acids half-oxyesters (SMAHOs) has been developed using 1,4-diazabicyclo[2.2.2]octane (DABCO) as an organocatalyst. The reaction proceeds under simple reaction conditions and tolerates a broad range of substrates, affording general access to β2,3-aminoesters, the syn diastereomer being the major one. An alternative multicomponent protocol has also been developed to increase the overall eco-compatibility of the process.
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