Difluorocarbene-Triggered Acyl Rearrangement Reaction: A Strategy for the Direct Introduction of the <i>gem</i>-Difluoromethylene Group
作者:Haitao Cui、Caijin Ban、Fengting Zhu、Jingmei Yuan、Juan Du、Yanmin Huang、Qi Xiao、Chusheng Huang、Jun Huang、Qiang Zhu
DOI:10.1021/acs.orglett.2c03907
日期:2023.1.13
A novel metal- and catalyst-free dearomative reaction of 2-oxypyridines to construct gem-difluoromethylenated N-substituted 2-pyridones has been developed. The reaction involves an attractive acyl rearrangement from O to CF2 of difluorocarbene-derived pyridinium ylides, which provides a new strategy for the direct introduction of the gem-difluoromethylene group with high efficiency and selectivity as
开发了一种新型的无金属和无催化剂的 2-氧吡啶脱芳烃反应,用于构建偕-二氟亚甲基化的 N-取代 2-吡啶酮。该反应涉及二氟卡宾衍生的吡啶鎓叶立德从O到CF 2的吸引性酰基重排,为直接引入偕-二氟亚甲基提供了一种高效、选择性好、底物适用范围广的新策略。还证明了克级合成和合成转化。