Recyclable Hypervalent Iodine(III) Reagent Iodosodilactone as an Efficient Coupling Reagent for Direct Esterification, Amidation, and Peptide Coupling
作者:Jun Tian、Wen-Chao Gao、Dong-Mei Zhou、Chi Zhang
DOI:10.1021/ol301085v
日期:2012.6.15
hypervalent iodine(III) reagent plays a novel role as an efficient coupling reagent to promote the direct condensation between carboxylic acids and alcohols or amines to provide esters, macrocyclic lactones, amides, as well as peptides without racemization. The regeneration of iodosodilactone (1) can also be readily achieved. The intermediate acyloxyphosphonium ion C from the activation of a carboxylic acid
高价碘(III)试剂在促进羧酸与醇或胺之间的直接缩合以提供酯,大环内酯,酰胺以及未经消旋化作用的肽方面起着新颖的作用,可促进羧酸与醇或胺之间的直接缩合。碘代二内酯(1)的再生也可以容易地实现。据认为,来自羧酸活化的中间体酰氧基phosph离子C参与了本酯化反应。