Denmark SE, Chi HM. Catalytic, Enantioselective, Intramolecular Sulfenoamination of Alkenes with Anilines.
J Org Chem 2017;
82:3826-3843. [PMID:
28294614 PMCID:
PMC5388071 DOI:
10.1021/acs.joc.7b00391]
[Citation(s) in RCA: 44] [Impact Index Per Article: 6.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/02/2023]
Abstract
![]()
A method
for the catalytic, enantioselective, intramolecular sulfenoamination
of alkenes with aniline nucleophiles has been developed. The method
employs a chiral, Lewis basic selenophosphoramide catalyst and a Brønsted
acid co-catalyst to promote stereocontrolled C–N and C–S
bond formation by activation of an achiral sulfenylating agent. Benzoannulated
nitrogen-containing heterocycles such as indolines, tetrahydroquinolines,
and tetrahydrobenzazepines were prepared with high to excellent enantioselectivities.
The impact of tether length and electron density of both the nucleophile
and olefin on the reactivity, site selectivity, and enantioselectivity
were investigated and interpreted in terms of substrate-dependent
stereodetermining thiiranium ion formation or capture.
Collapse