Enantioselective Catalytic α-Alkylation of Aldehydes via an S<sub>N</sub>1 Pathway
作者:Adam R. Brown、Wen-Hsin Kuo、Eric N. Jacobsen
DOI:10.1021/ja103618r
日期:2010.7.14
Primary aminothiourea derivatives are shown to catalyzeenantioselective alkylation of alpha-arylpriopionaldehdyes with diarylbromomethane. Evidence for a stepwise, S(N)1 mechanism in the substitution reaction induced by anion binding to the catalyst is provided by catalyst structure-activity studies, kinetic isotope effects, linear free-energy relationship studies, and competition experiments.