Chemoselective CaO-Mediated Acylation of Alcohols and Amines in 2-Methyltetrahydrofuran
作者:Vittorio Pace、Pilar Hoyos、Andrés R. Alcántara、Wolfgang Holzer
DOI:10.1002/cssc.201200922
日期:2013.5
Calcium oxide is proposed as an innocuous acid scavenger for the chemoselective synthesis of amide‐ and ester‐type compounds. Although these molecules have wide spread applications in organic and pharmaceutical chemistry, and a large number of routes have been designed for their synthesis, the development of more efficient and environmentally friendly acylation strategies remains an ongoing challenge
氧化钙被提议作为酰胺和酯类化合物化学选择性合成的无害酸清除剂。尽管这些分子在有机和药物化学中具有广泛的应用,并且已经设计了许多合成途径,但是开发更有效和对环境友好的酰化策略仍然是一项持续的挑战。CaO的使用允许在酚或叔醇存在下伯醇的化学计量酰化;胺还可以在羟基存在下进行酰化反应。如果起始原料是光学纯的醇或使用手性酰化剂,则通过酰化获得手性。此外,使用更环保的溶剂2-甲基四氢呋喃(2-MeTHF),导致产量最大化。该协议已成功应用于有趣的综合N-芳基恶唑烷-2-酮中间体,用于制备利奈唑胺类化合物。