Organocatalyzed Domino [3+2] Cycloaddition/Payne-Type Rearrangement using Carbon Dioxide and Epoxy Alcohols
作者:Sergio Sopeña、Mariachiara Cozzolino、Cristina Maquilón、Eduardo C. Escudero-Adán、Marta Martínez Belmonte、Arjan W. Kleij
DOI:10.1002/anie.201803967
日期:2018.8.27
cyclic carbonate under thermodynamic control. The latter are conveniently trapped in situ, providing overall a new domino process for synthetically elusive heterocyclic scaffolds. Control experiments provide a rationale for the observed cascade reactions, which demonstrate similarity to the well‐known Payne rearrangement of epoxy alcohols.
已经开发了一种空前的有机催化方法,用于从三或四取代的肟酮和二氧化碳制得高度取代的环状碳酸酯。该协议涉及在温和,无添加剂和无金属的条件下使用简单廉价的超碱,以初步形成较少取代的碳酸酯产物,该产物在热力学控制下平衡为三或什至四取代的环状碳酸酯。后者被方便地原位捕获,为合成难以捉摸的杂环支架提供了总体上新的多米诺骨牌工艺。对照实验为观察到的级联反应提供了理论依据,该级联反应证明与众所周知的环氧醇的佩恩重排相似。