Enantioselective Pd-Catalyzed Decarboxylative Allylic Alkylation of Thiopyranones. Access to Acyclic, Stereogenic α-Quaternary Ketones
作者:Eric J. Alexy、Scott C. Virgil、Michael D. Bartberger、Brian M. Stoltz
DOI:10.1021/acs.orglett.7b02354
日期:2017.10.6
A catalytic, enantioselective decarboxylative allylicalkylation of 4-thiopyranones is reported. The α-quaternary 4-thiopyranones produced are challenging to access by standard enolate alkylation owing to facile ring-opening β-sulfur elimination. In addition, reduction of the carbon–sulfur bonds provides access to elusive acyclic α-quaternary ketones. The alkylated products are obtained in up to 92%