2-chloro-9-cyclopentyl-7-ethyl-7-fluoro-5-methyl-8,9-dihydro-5H-pyrimido[4,5-b][1,4]diazepin-6(7H)-one   、                                                                                      
4-氨基-3-甲氧基苯甲酸                                                                                                                                                              在
                                                                                                                                         
盐酸                                                                                                                                                                          作用下,
                                                                                                                以
                                                                                         
异丙醇                                                                                  为溶剂,
                                                                                                                                                    反应 20.0h,
                                                                                                                以to give 730 mg product as white solid (83%)的产率得到4-(9-cyclopentyl-7-ethyl-7-fluoro-5-methyl-6-oxo-6,7,8,9-tetrahydro-5H-pyrimido[4,5-b][1,4]diazepin-2-ylamino)-3-methoxybenzoic acid