Regioselective Rhodium-Catalyzed Addition of β-Keto Esters, β-Keto Amides, and 1,3-Diketones to Internal Alkynes
作者:Thorsten M. Beck、Bernhard Breit
DOI:10.1002/ejoc.201601230
日期:2016.12
The first rhodium-catalyzed regioselective addition of 1,3-dicarbonyl compounds, including β-keto esters, β-keto amides, and 1,3-diketones, to internal alkynes furnishes branched allylic compounds. By applying RhI/DPEphos/TFA as the catalytic system, aliphatic as well as aromatic internal methyl-substituted alkynes act as suitable substrates to yield valuable branched α-allylated 1,3-dicarbonyl compounds
第一铑催化的区域选择性加入1,3-二羰基化合物,包括β酮酯,β - 酮酰胺和1,3-二酮,到内部炔烃配料支链的烯丙基化合物。通过应用 RhI/DPEphos/TFA 作为催化体系,脂肪族和芳香族内部甲基取代的炔烃作为合适的底物,以良好到优异的产率区域选择性地产生有价值的支链 α-烯丙基化 1,3-二羰基化合物。一个简单的基本皂化-脱羧程序提供了获得有价值的 γ,δ-不饱和酮的途径。该反应显示出广泛的官能团耐受性,并且两个反应伙伴的众多结构变化突出了该方法的合成潜力和灵活性。