Herein, a photocatalytic strategy for the synthesis of succinic acids by alkene dicarboxylation with carbon dioxide (CO2) and formate salt as synergistic carbon sources is described. The formate salt acts as both a C1 source and reductant in the reaction with catalytic amount of 1,4-diazabicyclo[2.2.2]octane (DABCO) as a hydrogen atom transfer reagent. Various mono-, di-, and trisubstituted alkenes
Visible-light-driven alkene dicarboxylation with formate and CO2 under mild conditions
作者:Fulin Zhang、Xiao-Yang Wu、Pan-Pan Gao、Hao Zhang、Zhu Li、Shangde Ai、Gang Li
DOI:10.1039/d3sc04431a
日期:——
dicarboxylation of diverse alkenes, including simple styrenes. The highly competing hydrocarboxylation side reaction was successfully overridden. Good yields of products were obtained undermild reaction conditions at ambient temperature and pressure of CO2. The dual role of formate salt may stimulate the discovery of a range of new transformations undermild and friendly conditions.
ring-opening carboxylation of styrene carbonates with CO2 to achieve dicarboxylic acids and/or β-hydroxy acids has been developed via the selective cleavage of the C(sp3)–O bond in cyclic carbonates. The product selectivity is probably determined by the stability and reactivity of the key benzylic radical and carbanionintermediate.
通过选择性裂解环状碳酸酯中的 C(sp 3 )–O 键,开发了苯乙烯碳酸酯与 CO 2的电还原开环羧化以获得二羧酸和/或β-羟基酸。产物选择性可能由关键的苄基和碳负离子中间体的稳定性和反应性决定。