Practical synthetic approach to 4-acetoxy-2-azetidinone for the preparation of carbapenem and penem antibiotics
作者:Guo-Bin Zhou、Yue-Qing Guan、He Tang、Yan-Bin Zhao、Li-Rong Yang
DOI:10.1007/s11164-011-0344-5
日期:2012.1
A practical synthesis of 4-acetoxy-2-azetidinone useful for the preparation of carbapenem- and penem-type antibiotics is described. The synthesis has advantages such as avoiding the tedious and costly column chromatographic or recrystallized separation steps for diastereomers. The overall yield of the product is greatly improved and the process is also more economical for large-scale production. In addition, the mechanism for oxidative decarboxylation is also present.
本文介绍了一种用于制备碳青霉烯类和青霉烯类抗生素的 4-acetoxy-2-azetidinone 的实用合成方法。该合成方法的优点是避免了非对映异构体繁琐而昂贵的柱层析或重结晶分离步骤。产品的总体收率大大提高,而且该工艺对于大规模生产也更为经济。此外,氧化脱羧的机理也是如此。