tert-butyl 4-[(diphenyl-tert-butylsilyl)oxymethyl]-5-(4-hydroxy-2-methylbut-2-enyl)-2,2-dimethyloxazolidine-3-carboxylate 在
silica gel 、 N-(2,2,6,6-tetramethyl-1-oxopiperidin-1-ium-4-yl)acetamide tetrafluoroborate 作用下,
以
二氯甲烷 为溶剂,
反应 6.0h,
以85%的产率得到tert-butyl (4S,5S)-4-[[tert-butyl(diphenyl)silyl]oxymethyl]-2,2-dimethyl-5-[(E)-2-methyl-4-oxobut-2-enyl]-1,3-oxazolidine-3-carboxylate