Formation of Disubstituted β-Lactones Using Bifunctional Catalysis
作者:Michael A. Calter、Olexandr A. Tretyak、Christine Flaschenriem
DOI:10.1021/ol050411q
日期:2005.4.1
[reaction: see text] Acidchlorides and aromatic aldehydes react in the presence of a stoichiometric amount of a tertiary amine and catalytic amounts of a cinchona alkaloid derivative and a Lewis acid to produce beta-lactones in high diastereo- and enantioselectivity. The sense of the diastereoselectivity depends on the substitution of the acidchloride, with the reactions of aliphaticacid chlorides