The solid-phase synthesis of 4H-3,1-benzoxazin-4-ones was achieved using silica-bound benzoyl chloride (SBBC) as dehydrating agent in reaction with 2-acylaminobenzoic acids. The silica-grafted reagent (SBBC) was simply recovered after reaction and reused several times.
使用硅胶结合的苯酰氯(SBBC)作为脱水剂,与2-酰胺基苯甲酸反应,实现了4H-3,1-苯并噁唑酮的固相合成。反应后,硅胶接枝试剂(SBBC)可以简单地回收并多次重复使用。