DBU-promoted tandem Michael-addition/cyclization for the synthesis of polysubstituted pyrroles
作者:Tianyu Yang、Ke-Hu Wang、Danfeng Huang、Pengfei Li、Zhoubin Deng、Yinpeng Su、Yulai Hu
DOI:10.1016/j.tet.2019.02.057
日期:2019.4
An efficient and transition-metal-free method for the synthesis of the structurally diversified pyrroles is described. Various α,β-unsaturated ynones reacted with N-substituted ethyl glycine ethyl ester hydrochlorides in the presence of DBU to form the corresponding products in good yields. This protocol has the advantages of readily available starting materials, mild reaction conditions and a wide
描述了一种用于合成结构上多样化的吡咯的有效且无过渡金属的方法。在DBU存在下,各种α,β-不饱和的炔酮与N-取代的乙基甘氨酸乙酯盐酸盐反应,以高收率形成相应的产物。该方案的优点是容易获得的起始原料,温和的反应条件和广泛的底物范围,这为合成多取代的吡咯提供了实用的途径。