(5aS,10bR)-3-acetoxy-3-methyl-3a,4,5a,10b-tetrahydro-3H,6H-indeno[2,1-b]oxazolo[3,4-d][1,4]oxazin-11-ium perchlorate   、                                                                                      
2-异丙基苯胺                                                                                                                                                                                              以
                                                                                         
甲苯                                                                                  为溶剂,
                                                                                                                                                    反应 12.0h,
                                                                                                                以325 mg的产率得到(5aS,10bR)-3-hydroxy-2-(2-isopropylphenyl)-3-methyl-3a,4,5a,10b-tetrahydro-3H,6H-imidazo[1,5-d]indeno[2,1-b][1,4]oxazin-2-ium perchlorate