Process for the resolution of racemates and lactone esters used in said process.

摘要

Racemic carboxylic acids are resolved into their enantiomers using optically active enantiomers of four lactones as resolving agents. The four lactones are 2,3-isopropylidene-ribonic acid-1,4-lactone; 1,2-isopropylidene-. glucofuranurono-3,6-lactone; 2-hydroxy-3,3-dimethyi-1,4- butyrolactone and 3,4-isopropylidene-arabino-1,5-lactone. Novel diastereoisomeric esters of the acids with the lactones are disclosed.