4-(4-Methoxy-phenyl)-2-methyl-1,2,3,3a,4,9b-hexahydro-chromeno[3,4-b]pyrrole-1-carboxylic acid methyl ester   、                                                                                      
甲基磺酰氯                                                                                                                                                              在
                                                                                                                                                                                 
三乙胺                                                                                                                                  作用下,
                                                                                                                                                                                                                            以35%的产率得到3-Methanesulfonyl-4-(4-methoxy-phenyl)-2-methyl-1,2,3,3a,4,9b-hexahydro-chromeno[3,4-b]pyrrole-1-carboxylic acid methyl ester