(2S,4S)-3-(2-Chloro-acetyl)-2-(2-hydroxy-phenyl)-5,5-dimethyl-thiazolidine-4-carboxylic acid methyl ester 在
sodium hydride 作用下,
以
六甲基磷酰三胺 为溶剂,
反应 24.0h,
以62.1%的产率得到(3S,10bS)-2,2-Dimethyl-4-oxo-2,3,4,5-tetrahydro-10bH-6-oxa-1-thia-3a-aza-benzo[e]azulene-3-carboxylic acid methyl ester