(4S,5R)-4-(2-allyloxyphenyl)-3-benzoyl-2-(4-methoxyphenyl)oxazolidine-5-carboxylic acid   、                                                                                      
(2S,10S,10aR)-10-benzoyloxy-2-hydroxy-9-pent-4-enoyloxymethyl-1,2,3,5,10,10a-hexahydropyrrolo[1,2-b]isoquinolin-5-one                                                                                                                                                              在
                                                                                                                                                                                 
4-二甲氨基吡啶   、                                                                                                  
盐酸-N-乙基-Nˊ-(3-二甲氨基丙基)碳二亚胺                                                                                                                                  作用下,
                                                                                                                以
                                                                                         
二氯甲烷                                                                                  为溶剂,
                                                                                                                                                                                        以96%的产率得到(2S,10S,10aR)-10-benzoyloxy-5-oxo-9-pent-4-enoyloxymethyl-1,2,3,5,10,10a-hexahydropyrrolo[1,2-b]isoquinolin-2-yl (4'S,5'R)-4'-(2-allyloxyphenyl)-3'-benzoyl-2'-(4-methoxyphenyl)oxazolidine-5-carboxylate