申请人:E.R. Squibb & Sons, Inc.
公开号:EP0237264A2
公开(公告)日:1987-09-16
A process is provided for preparing phosphonyloxyacylamino acids and derivatives thereof having the structure
wherein
which includes the steps of treating a phosphonic acid dichloride of the structure
with an a-hydroxy acid of the structure
in the presence of base such as triethylamine at reduced temperatures to form the cyclic mixed anhydride of the structure
(which is a new intermediate) and reacting the cyclic mixed anhydride with an amino acid or ester of the structure
HX
in the presence of base such as triethylamine produces the ACE inhibitor compound
In an alternative process, the cyclic anhydride is quenched with water to form the diacid
which is treated with a condensing agent such as dicyclohexyl carbodiimide (DCC), 1,1-carbonytdiimidazole (CDI) or thionyl chloride followed by quenching with the amino acid
HX
produces the above ACE inhibitor compound.
In another variation of the process of the invention, the above cyclic anhydride is treated with an alcohol of the structure
R30H
to form the phosphonic acid diester
which may be coupled with the amino acid or ester
HX
to form the ACE inhibitor
提供了一种制备磷酰氧基乙酰胺及其衍生物的工艺,其结构如下
其中
其中包括以下步骤 将结构如下的膦酸二氯化物与结构如下的 a-羟基酸一起处理
结构的 a-羟基酸
在碱如三乙胺存在下,在降低的温度下形成结构式的环状混合酸酐
(这是一种新的中间体),然后将环状混合酸酐与结构式的氨基酸或酯反应
HX
在三乙胺等碱存在下反应生成 ACE 抑制剂化合物
在另一种工艺中,环状酸酐用水淬灭后形成二酸
再用缩合剂如二环己基碳二亚胺(DCC)、1,1-碳二咪唑(CDI)或亚硫酰氯处理,然后用氨基酸淬灭
HX
产生上述 ACE 抑制剂化合物。
在本发明工艺的另一种变化中,上述环状酸酐用结构如下的醇处理
R30H
形成膦酸二酯
可与氨基酸或酯类偶联
HX
形成 ACE 抑制剂