Synthesis of Polysubstituted Trifluoromethylpyridines from Trifluoromethyl-α,β<i>-</i>ynones
作者:Tianyu Yang、Zhoubin Deng、Ke-Hu Wang、Pengfei Li、Danfeng Huang、Yingpeng Su、Yulai Hu
DOI:10.1021/acs.joc.9b02873
日期:2020.1.17
trifluoromethylpyridine derivatives by the Bohlmann-Rahtz heteroannulation reaction is described, which use trifluoromethyl-α,β-ynones as trifluoromethyl building blocks to react with β-enamino esters or β-enamino ketones in the presence of ZnBr2 to form the trifluoromethylpyridine derivatives in good yields. The protocol has the advantages of readily available starting materials, mild reaction conditions, and
描述了一种通过Bohlmann-Rahtz杂环化反应合成多取代的三氟甲基吡啶衍生物的新颖有效的方法,该方法使用三氟甲基-α,β-炔酮作为三氟甲基结构单元,在存在以下条件下与β-烯氨基酯或β-烯氨基酮反应ZnBr2以良好的收率形成三氟甲基吡啶衍生物。该方案具有容易获得的起始原料,温和的反应条件和高原子经济性的优点。