发明授权
US07786301B2 Process for preparing xanthine phosphodiesterase V inhibitors and precursors thereof 失效
黄嘌呤磷酸二酯酶V抑制剂及其前体的制备方法

Process for preparing xanthine phosphodiesterase V inhibitors and precursors thereof
摘要:
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.
信息查询
0/0