论文信息 - Formation of Disubstituted β-Lactones Using Bifunctional Catalysis

Formation of Disubstituted β-Lactones Using Bifunctional Catalysis

Acid chlorides 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 β-lactones in high diastereo- and enantioselectivity. The sense of the diastereoselectivity depends on the substitution of the acid chloride, with the reactions of aliphatic acid chlorides giving predominantly the trans-isomer and those of alkoxyacetyl chlorides favoring formation of the cis-isomer.

M. Calter | C. Flaschenriem | Olexandr A. Tretyak

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