作者:Scott A. Savage、Gregory S. Jones、Sergei Kolotuchin、Shelly Ann Ramrattan、Truc Vu、Robert E. Waltermire
DOI:10.1021/op900226j
日期:2009.11.20
commercial-scale synthesis of the DPP-IV inhibitor, saxagliptin (1), is described from the two unnatural amino acid derivatives 2 and 3. After the deprotection of 3, the core of 1 is formed by the amide coupling of amino acid 2 and methanoprolinamide 4. Subsequent dehydration of the primary amide and deprotection of the amine affords saxagliptin, 1. While acid salts of saxagliptin have proven to be stable
从两个非天然氨基酸衍生物2和3描述了DPP-IV抑制剂沙格列汀(1)的商业规模合成。3脱保护后,1的核心是由氨基酸2和甲亚甲基脯氨酰胺4的酰胺偶联形成的。随后伯酰胺脱水和胺脱保护得到沙格列汀1。虽然沙格列汀的酸盐已证明在溶液中稳定,但由于游离胺向热力学上有利的转化为六元环am 9,因此所需的游离碱一水合物的合成颇具挑战性。。在开发后期进行了重大的过程修改,以增强过程的鲁棒性,为过渡到商业制造做准备。此处将说明这些更改的推动力和理由。