to produce unisolable allylchromium species which add efficiently to aldehydes or ketones with high degree of stereo- and chemoselectivity. Particularly, high threo selectivity is observed in the reaction of aldehydes and 1-bromo-2-butene and is ascribed to a chair-like six-membered transition state. Simple reduction of allylic and benzylic halides produces biallyls and bibenzyls, while gem-dibromocyclopropanes
Photoredox/Nickel Dual-Catalyzed Allylation of Aldehydes with Allylic Alcohols and Mechanistic Insights in the Presence of CO2
作者:Zeyu Zhang、Zongchang Han、Jiayuan Li、Han-Shi Hu、Jun Li、Chanjuan Xi
DOI:10.1021/acscatal.4c03991
日期:2024.8.16
Direct utilization of allylic alcohols as allylic reagents without metal reductants has drawn significant attention. Herein, we report a practical, diastereoselective photoredox/Ni(II)-dual-catalyzed reductive allylation reaction of aldehydes with readily accessible allylic alcohols in the presence of CO2. This methodology allows the branched regioselective direct allylation of a wide range of aldehydes