Vishe M, Johnston JN. The inverted ketene synthon: a double umpolung approach to enantioselective β
2,3-amino amide synthesis.
Chem Sci 2019;
10:1138-1143. [PMID:
30774911 PMCID:
PMC6349014 DOI:
10.1039/c8sc04330b]
[Citation(s) in RCA: 10] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/29/2018] [Accepted: 11/11/2018] [Indexed: 12/29/2022] Open
Abstract
A stereocontrolled synthesis of β2,3-amino amides is reported. Innovation is encapsulated by the first use of nitroalkenes to achieve double umpolung in enantioselective β-amino amide synthesis. Step economy is also fulfilled by the use of Umpolung Amide Synthesis (UmAS) in the second step, delivering the amide product without intermediacy of a carboxylic acid or activated derivative. Molybdenum oxide-mediated hydride reduction provides the anti-β2,3-amino amide with high selectivity.
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