1-{[(Z)-2-Cyano-4,5-dimethoxy-phenylimino]-methylsulfanyl-methyl}-piperidine-4-carboxylic acid 2,2-dimethyl-propyl ester                                                                                                                                                              在
                                                                                                                                                                                 ammonium chloride                                                                                                                                  作用下,
                                                                                                                以
                                                                                         formamide                                                                                  为溶剂,
                                                                                                                                                                                        以81%的产率得到2,2-Dimethylpropyl 1-(4-amino-6,7-dimethoxyquinazolin-2-yl)piperidine-4-carboxylate;hydrochloride