Organocatalytic Stereoselective Synthesis of Acyclic γ-Nitrothioesters with All-Carbon Quaternary Stereogenic Centers
作者:Yukihiro Arakawa、Sven P. Fritz、Helma Wennemers
DOI:10.1021/jo500403q
日期:2014.5.2
stereoselective synthesis of acyclic thioesters bearing adjacent quaternary and tertiary stereogeniccenters under mild organocatalytic conditions was developed. α-Substituted monothiomalonates (MTMs) were used as thioester enolate equivalents. They reacted cleanly with nitroolefins in the presence of 1–6 mol % of cinchona alkaloid urea derivatives, and provided access to γ-nitrothioesters with quaternary stereocenters