(4S,5S)-4-[(E)-(1S,2S)-2-(tert-Butyl-dimethyl-silanyloxy)-1-hydroxy-pent-3-enyl]-2,2,5-trimethyl-oxazolidine-3-carboxylic acid tert-butyl ester 在
对甲苯磺酸 作用下,
以
甲醇 为溶剂,
以45%的产率得到{(1R,2S)-1-[(4S,5S)-2,2-Dimethyl-5-((E)-propenyl)-[1,3]dioxolan-4-yl]-2-hydroxy-propyl}-carbamic acid tert-butyl ester