Chemistry of sulfenic acids. 7. Reason for the high reactivity of sulfenic acids. Stabilization by intramolecular hydrogen bonding and electronegativity effects
organolithiums, Grignardreagents, or zincates to sulfinylnitriles triggers a facile sulfinyl–metal exchange to afford N‐ or C‐metalated nitriles. Sulfinyl–magnesium exchange–alkylations efficiently install quaternary and tertiary centers, even in the case of tertiary sulfinylnitriles that contain a highly acidic methine proton. α‐Sulfinylalkenenitriles afford moderately nucleophilic magnesiated nitriles, and
Asmic: An Exceptional Building Block for Isocyanide Alkylations
作者:Embarek Alwedi、J. Armando Lujan-Montelongo、Bhaskar R. Pitta、Allen Chao、Rodrigo Cortés-Mejía、Jorge M. del Campo、Fraser F. Fleming
DOI:10.1021/acs.orglett.8b02574
日期:2018.9.21
Asmic addresses the long-standing challenge of alkylating isocyanides, providing access to isocyanides with diverse substitution patterns. The o-anisylsulfanyl group serves a critical dual role by facilitating deprotonation-alkylation and providing a latent nucleophilic site through an unusual arylsulfanyl-lithium exchange.
DAVIS, F. A.;JENKINS, L. A.;BILLMERS, R. L., J. ORG. CHEM., 1986, 51, N 7, 1033-1040