A novel process for the amidation or esterification which comprises reacting a compound having a carboxy group with a compound having an amino or imino group which can be acylated or with a compound having a hydroxy group in the presence of a sulfonic acid ester of the formula: R.sub.1 --SO.sub.2 --OR.sub.2 wherein R.sub.1 is an organic group and R.sub.2 O-- is a residue of a strongly acidic N-hydroxy compound as a condensation agent, and a novel sulfonic acid ester useful as such a condensation agent and a process for the preparation thereof.
一种用于酰胺化或酯化的新型过程,包括在有机
硫酸酯存在下,将具有羧基的化合物与可酰化的
氨基或亚
氨基基团的化合物,或具有羟基的化合物反应,其中所述有机
硫酸酯的
化学式为:R.sub.1 --SO.sub.2 --OR.sub.2,其中R.sub.1是有机基团,R.sub.2 O--是强酸性N-羟基化合物的残基作为
缩合剂,以及一种作为这种
缩合剂有用的新型
磺酸酯和其制备方法。