A process for the preparation of carboxylic acid succinimidyl esters by reaction of N-hydroxysuccinimide with a carboxylic acid and a halophosphoric acid ester of the formula ##STR1## is desired, in which R.sub.1 and R.sub.2 are identical or different and are a C.sub.2 - to C.sub.6 -alkyl radical or a phenyl radical, or R.sub.1 and R.sub.2 The process is carried out in the presence of a base in a diluent at a temperature of 0.degree. C. up to 100.degree. C. with isolation of the corresponding carboxylic acid succinimidyl ester.
一种通过N-羟基琥珀
酰亚胺与
羧酸和具有公式##STR1##的卤代
磷酸酯反应制备
羧酸琥珀
酰亚胺酯的方法,其中R.sub.1和R.sub.2相同或不同,是C.sub.2-C.sub.6-烷基基团或苯基团,或R.sub.1和R.sub.2在稀释剂中在0°C至100°C的温度下在碱的存在下进行,隔离相应的
羧酸琥珀
酰亚胺酯。