Visible-Light Photoredox Catalyzed Dehydrogenative Synthesis of Allylic Carboxylates from Styrenes
作者:Yang Liu、Simone Battaglioli、Lorenzo Lombardi、Arianna Menichetti、Giovanni Valenti、Marco Montalti、Marco Bandini
DOI:10.1021/acs.orglett.1c01375
日期:2021.6.4
The visible-light photoredox/[Co(III)] cocatalyzed dehydrogenative functionalization of cyclic and acyclic styryl derivatives with carboxylic acids is documented. The methodology enables the chemo- and regioselective allylic functionalization of styryl compounds, leading to allylic carboxylates (32 examples) under stoichiometric acceptorless conditions. Intermolecular as well as intramolecular variants
记录了环状和无环苯乙烯基衍生物与羧酸的可见光光氧化还原/[Co(III)]共催化脱氢官能化。该方法能够对苯乙烯基化合物进行化学和区域选择性烯丙基官能化,从而在化学计量无受体条件下生成烯丙基羧酸盐(32 个实例)。分子间和分子内变异的产率很高(高达 82%)。在实验和光谱研究相结合的基础上,还提出了机械原理。