N-(2-Cyano-4,5-dimethoxy-phenyl)-4-(2-methyl-piperidine-1-carbonyl)-piperidine-1-carboximidothioic acid methyl ester 在
ammonium chloride 作用下,
以
formamide 为溶剂,
以73%的产率得到[1-(4-Amino-6,7-dimethoxy-quinazolin-2-yl)-piperidin-4-yl]-(2-methyl-piperidin-1-yl)-methanone; hydrochloride