申请人:Hoffmann-La Roche Inc.
公开号:US04501908A1
公开(公告)日:1985-02-26
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-isopropylideneglucofuranurono-3,6-lactone, 2-hydroxy-3,3-dimethyl-1,4-butyrolactone and 3,4-isopropylidene-arabino-1,5-lactone. Novel diastereoisomeric esters of the acids with the lactones are disclosed.
拉槽酸通过使用四种旋光活性的内酯对映体作为分离剂,被分离成它们的对映体。这四种内酯是2,3-异丙基-核糖酸-1,4-内酯,1,2-异丙基葡萄糖呋喃醇-3,6-内酯,2-羟基-3,3-二甲基-1,4-丁酸内酯和3,4-异丙基-阿拉伯糖-1,5-内酯。该专利公开了这些酸与内酯形成的新的非对映异构酯。