A process for preparing xanthine phosphodiesterase V inhibitors, and compounds utilized in said process. The process includes a five-step methodology for efficient synthesis of Compound (5) without intermediate purifications or separations, a dihalogenation step to synthesize Compound (7), and a coupling reaction to produce Compound (9).
一种制备
黄嘌呤磷酸二酯酶V
抑制剂的方法,以及在该方法中使用的化合物。该方法包括一个五步法的方法,用于高效合成化合物(5),不需要中间纯化或分离,通过二卤代反应合成化合物(7),并通过偶联反应产生化合物(9)。