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