Sequential Michael addition/retro-Claisen condensation of aromatic β-diketones with α,β-unsaturated esters: an approach to obtain 1,5-ketoesters
作者:Gui-Xin Cai、Jing Wen、Ting-Ting Lai、Dan Xie、Cheng-He Zhou
DOI:10.1039/c5ob02570b
日期:——
sequential C–C bond formation and cleavage of aromatic β-diketones with α,β-unsaturated esters is developed to obtain 1,5-ketoesters. The sequential reaction via Michael addition and retro-Claisen condensation proceeds smoothly under mild conditions in up to 98% isolated yield. The mechanism study disclosed that the cascade process involved C–C bond cleavage of aromatic β-diketone as a phenacyl donor under
开发了AK 2 CO 3催化的一锅法,涉及顺序形成C–C键并用α,β-不饱和酯裂解芳香族β-二酮,以获得1,5-酮酯。通过Michael加成反应和Retro-Claisen缩合反应的顺序反应可在温和条件下顺利进行,分离产率最高可达98%。机理研究表明,级联过程涉及在酒精碱性条件下芳族β-二酮作为苯甲酰基供体的C–C键裂解。