Improved Synthesis of Cefdinir and Its Polymorphic Form, an Antibacterial Active Pharmaceutical Ingredient
作者:Korrapati V. V. Prasada Rao、Ramesh Dandala、Meenakshisunderam S. Sivakumaran、Ananta Rani、Andra Naidu
DOI:10.1080/00397910701397284
日期:2007.7.1
Abstract New methods for the preparation of Cefdinir 1 and its polymorphic form Sesqui hydrate 1a are described. The synthesis of 2‐mercaptobenzothiazolyl (Z)‐2‐(2‐amino‐4‐thiazolyl)‐2‐acetoxyiminoacetate 4 was affected by using triphenylphosphine and triethylamine, and acylation of 7‐amino‐3‐vinylcephem‐4‐carboxylic acid 5 followed by deprotection with K2CO3 in the presence of ammonium chloride in
摘要 描述了制备头孢地尼 1 及其多晶型倍半水合物 1a 的新方法。2-巯基苯并噻唑基(Z)-2-(2-氨基-4-噻唑基)-2-乙酰氧基亚氨基乙酸酯4的合成受三苯基膦和三乙胺的影响,以及7-氨基-3-乙烯基头孢烯-4-羧酸5的酰化作用然后在氯化铵存在下在同一个锅中用 K2CO3 脱保护得到粗头孢地尼。通过树脂纯化粗头孢地尼,并用三氟乙酸处理所得湿产物,得到头孢地尼 6 的高纯度 TFA 盐,中和后以极好的收率得到 1a。还讨论了该化合物的杂质分析。