Development of an Isolable Active Ester, Diethyl Thiophosphoryl [(Z)-(2-Aminothiazol-4-yl)-2-(Methoxyimino)acetate (DAMA) for the Synthesis of Cefotaxime
作者:Man-Young Yoon、Hee-Bong Lee、Hyun-Ik Shin
DOI:10.5012/bkcs.2011.32.2.407
日期:2011.2.20
An isolable activated ester, diethyl thiophosphoryl [(Z)-(2-aminothiazol-4-yl)-2-(methoxyimino)acetate (9a, DAMA) was prepared in high purity, which was at least stable for 7 d at $25^\circ}C$ and 6 months at $5^\circ}C$. Its reaction with 7-ACA (4) in the presence of tributylamine in i-PrOH provided cefotaxime (1) of high purity in good yield. Preparation of DAMA and its reaction with 7-ACA (4) to 1 was performed in one-pot manner, respectively with minimal unit operations of stirring and filtration.
制备出一种可分离的活化酯,硫代磷酰[(Z)-(2-氨基噻唑-4-基)-2-(甲氧基亚氨基)乙酸二乙酯(9a,DAMA),纯度高,在$25^\circ}C$下至少可稳定7天,在$5^\circ}C$下可稳定6个月。它与 7-ACA (4) 在三丁胺存在下于 i-PrOH 中反应,得到了高纯度、高收率的头孢他啶 (1)。DAMA 的制备及其与 7-ACA (4) 反应生成 1 的过程均以一锅法进行,只需搅拌和过滤等最少的单元操作。