申请人:Hook David
公开号:US08580974B2
公开(公告)日:2013-11-12
The invention relates to a new process for producing NEP inhibitors or prodrugs thereof, in particular NEP inhibitors comprising a γ-amino-δ-biphenyl-α-methylalkanoic acid, or acid ester, backbone. In detail, the new processes, according to the present invention, are ultimately related to the synthesis of intermediates to prepare the above NEP inhibitors, namely compounds according to formula (1), or salt thereof,
wherein R1 and R2 are, independently of each other, hydrogen or a nitrogen protecting group, and R3 is a carboxyl group or an ester group, preferably carboxyl group or alkyl ester.
本发明涉及一种生产NEP抑制剂或其前药的新工艺,特别是包括γ-氨基-δ-联苯基-α-甲基脂肪酸或酸酯骨架的NEP抑制剂。具体而言,根据本发明,新工艺最终涉及合成中间体以制备上述NEP抑制剂,即按式(1)或其盐制备的化合物,其中R1和R2独立地是氢或氮保护基,R3是羧基或酯基,优选为羧基或烷基酯。