Alexander JR, Kevorkian PV, Topczewski JJ. Silver Mediated Banert Cascade with Carbon Nucleophiles.
Org Lett 2021;
23:3227-3230. [PMID:
33797930 DOI:
10.1021/acs.orglett.1c01032]
[Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/30/2022]
Abstract
The Banert cascade of propargylic azides can be promoted by simple silver salts, and the triazafulvene intermediate can be intercepted by carbon nucleophiles. Various indoles (>25 examples, up to 92% yield) and electron-rich heterocycles were effective. The Mayr nucleophilicity parameter (N) was found to correlate to the reaction efficiency, which enabled the formation of Csp3-Csp2 and Csp3-Csp3 bonds under otherwise identical conditions from structurally dissimilar nucleophiles.
Collapse