Acyl/aroyl Meldrum’s acid as an enol surrogate for the direct organocatalytic synthesis of α,β-unsaturated ketones
作者:Tushar M. Khopade、Prakash K. Warghude、Trimbak B. Mete、Ramakrishna G. Bhat
DOI:10.1016/j.tetlet.2018.12.013
日期:2019.1
E-selective α,β-unsaturated ketones. The method utilizes simple and easily accessible starting materials such as Meldrum’s acid, carboxylic acid, aldehyde and simple bifunctional amine catalyst. The tandem organocatalytic process utilizes acyl/aroyl Meldrum’s acid as an enol surrogate for the effective Doebner-Knoevenagel type condensation reactions. A wide variety of aldehydes, carboxylic acids and base
开发了操作上简单,稳健和简单的有机催化方案,用于合成E选择性α,β-不饱和酮。该方法利用简单且容易获得的起始原料,例如梅德鲁姆酸,羧酸,醛和简单的双官能胺催化剂。串联有机催化过程利用酰基/芳酰基梅德鲁姆酸作为烯醇替代物,以进行有效的Doebner-Knoevenagel型缩合反应。在温和的反应条件下,各种醛,羧酸和碱敏感的官能团均具有良好的耐受性。