Potassium salts (22) of various carboxylic acids readily react with 2, 2'-oxalyldi(2, 3-dihydro-3-oxobenzisosulfonazole) (17) to form the corresponding 2-acyl-2, 3-dihydro-3-oxobenzisosulfonazoles (24) as intermediates, which undergo aminolysis, alcoholysis, and thioalcoholysis to afforded amides (5), esters (6), and thioesters (7), respectively. These findings show that 17 can be conveniently used as a condensing agent for the synthesis of carboxylic acid derivatives (5, 6 or 7).
各种
羧酸的
钾盐(22)容易与2, 2'-草酰二(2, 3-二氢-3-氧代苯并异磺酰胺)(17)反应,形成相应的2-酰基-2, 3-二氢-3-氧代苯并异磺酰胺(24)作为中间体,这些中间体通过胺解、醇解和
硫醇解分别得到酰胺(5)、酯(6)和
硫酯(7)。这些发现表明,17可以方便地用作合成
羧酸衍
生物(5、6或7)的
缩合剂。