作者:Haoling Gao、Jiangang Yu、Chengsheng Ge、Qun Jiang
DOI:10.3390/molecules23061440
日期:——
Optically pure sitagliptin phosphate monohydrate is efficiently and practically synthesized through a chiral hemiacetal as the key intermediate in 54% overall yield starting from (E)-4-(2,4,5-trifluorophenyl)but-2-enal and N-boc-protected hydroxylamine. The chiral hemiacetal fragment is constructed by a tandem aza-Michael/hemiacetal reaction catalyzed by an organocatalyst and the influence of acidity
光学纯的西他列汀磷酸一水合物是通过手性半缩醛作为主要中间体,从(E)-4-(2,4,5-三氟苯基)but-2-enal和N-boc-保护的羟胺。手性半缩醛片段是由有机催化剂催化的氮杂-迈克尔/半缩醛串联反应构建的,并详细研究了布朗斯台德酸的酸度对氮杂-迈克尔/半缩醛的串联反应的影响。