Iodobenzene Dichloride in the Esterification and Amidation of Carboxylic Acids: In-Situ Synthesis of Ph<sub>3</sub>PCl<sub>2</sub>
作者:Myriam S. Carle、Grace K. Shimokura、Graham K. Murphy
DOI:10.1002/ejoc.201600714
日期:2016.8
A novel, in-situ synthesis of dichlorotriphenylphosphorane (Ph3PCl2) is accomplished upon combining PPh3 and the easily prepared hypervalent iodine reagent iodobenzene dichloride (PhICl2). The phosphorane is selectively generated in the presence of carboxylic acid or alcohol residues to rapidly produce acyl chlorides and alkyl chlorides in high yields. Addition of EtOH, PhOH, BnOH, Et2NH or CH2N2 results
通过将 PPh3 与易于制备的高价碘试剂碘苯二氯化物 (PhICl2) 结合,实现了二氯三苯基正膦 (Ph3PCl2) 的新型原位合成。在羧酸或醇残基存在下选择性地生成正膦,以高产率快速生成酰氯和烷基氯。EtOH、PhOH、BnOH、Et2NH 或 CH2N2 的添加导致由羧酸直接合成酯、酰胺和重氮酮。