4-(<i>N,N</i>-Dimethylamino)pyridine Hydrochloride as a Recyclable Catalyst for Acylation of Inert Alcohols: Substrate Scope and Reaction Mechanism
作者:Zhihui Liu、Qiaoqiao Ma、Yuxiu Liu、Qingmin Wang
DOI:10.1021/ol4030875
日期:2014.1.3
4-(N,N-Dimethylamino)pyridine hydrochloride (DMAP·HCl), a DMAP salt with the simplest structure, was used as a recyclable catalyst for the acylation of inert alcohols and phenols under base-free conditions. The reaction mechanism was investigated in detail for the first time; DMAP·HCl and the acylating reagent directly formed N-acyl-4-(N′,N′-dimethylamino)pyridine chloride, which was attacked by the
具有最简单结构的DMAP盐4-(N,N-二甲基氨基)吡啶盐酸盐(DMAP·HCl)用作可循环使用的催化剂,用于在无碱条件下酰化惰性醇和酚。首次详细研究了反应机理。DMAP·HCl和酰化剂直接形成N-酰基-4-(N',N'-二甲基氨基)吡啶氯化物,被亲核底物攻击形成过渡中间体,该中间体释放出酰化产物并再生DMAP·HCl催化剂。