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Production of 4-acyloxy-2-azetidinone

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专利汇可以提供Production of 4-acyloxy-2-azetidinone专利检索,专利查询,专利分析的服务。并且PURPOSE: To obtain the subject compound useful as a synthetic intermediate for carbapenem antibiotic substance from inexpensive raw materials by treating a 2-oxo-1,3-dioxan derivative with a carboxylic acid derivative.
CONSTITUTION: The objective 4-acyloxy-2-azetidinone derivative of formula II (R
1 is H or OH-protecting group; R
2 is H, alkyl or aryl) is produced by treating a compound of formula I with a carboxylic acid derivative of formula XII. The carboxylic acid derivative is formic acid, acetic acid, propionic acid, etc. The reaction is carried out by using the carboxylic acid singly or in the presence of a catalyst. The catalyst is lithium salt, sodium salt, potassium salt, etc., of the carboxylic acid derivative. As an alternative method, the compound of formula II is produced by treating a 2-acyl-1,3-dioxan derivative of formula III (R
3 is H, alkyl or aryl) with a peracid optionally in the presence of a carboxylic acid derivative of formula XII.
COPYRIGHT: (C)1990,JPO&Japio,下面是Production of 4-acyloxy-2-azetidinone专利的具体信息内容。

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