Photocatalytic Aerobic Oxidative Ring Expansion of Cyclic Ketones to Macrolactones by Cerium and Cyanoanthracene Catalysis
作者:Jianbo Du、Xiaokun Yang、Xin Wang、Qing An、Xu He、Hui Pan、Zhiwei Zuo
DOI:10.1002/anie.202012720
日期:2021.3
We describe a cerium‐catalyzed aerobic oxidative ring expansion for the expedient construction of synthetically challenging macrolactones under visible‐light conditions. Cyanoanthracene has been employed as co‐catalyst to accelerate the turnover of the cerium cycle leading to a fast conversion within 20 min of irradiation. Taking advantage of the high efficiency and operationally simple conditions
我们描述了铈催化的好氧氧化环扩展,以在可见光条件下方便地合成具有挑战性的大内酯。氰基蒽已被用作助催化剂来加速铈循环的周转,从而在辐照后20分钟内实现快速转化。利用高效和操作简单的条件,已经从简单的构建基块中收集了100多种配备了9至19元大环的环系的大内酯。此外,已通过sonnerlactone的简明合成证明了该策略简化分子复杂性产生的潜在潜力。