N-(4-cyano-2-t-butyldimethylsilanoxyphenyl)-N'-(2-bromophenyl)carbodiimide   、                                                                                      
N,N-二异丙基乙胺   、                                                                                      
hydroxy-L-Proline methyl ester hydrochloride   、                                                                                      
四丁基氟化铵   、                                                                                      
四氢呋喃                                                                                                                                                                                              以
                                                                                         
甲醇                                                                                  为溶剂,
                                                                                                                                                                                        以to give 80 mg (78%) of 4-[[(6R,7aS)-2-(2-bromophenyl)-hexahydro-6-hydroxy-1-oxo-3H-pyrrolo[1,2-c]imidazol-3-ylidene]amino]-3-hydroxybenzonitrile as a tan powder的产率得到4-[[(6r,7As)-2-(2-bromophenyl)-hexahydro-6-hydroxy-1-oxo-3h-pyrrolo[1,2-c]imidazol-3-ylidene]amino]-3-hydroxybenzonitrile