BF<sub>3</sub>·OEt<sub>2</sub>-Mediated Tandem Annulation: A Strategy To Construct Functionalized Chromeno- and Pyrano-Fused Pyridines
作者:K.T. Ashitha、V. Praveen Kumar、C.T. Fathimath Salfeena、B. S. Sasidhar
DOI:10.1021/acs.joc.7b02463
日期:2018.1.5
variety of N-substituted pyridine-fused chromeno and pyrano derivatives were obtained with satisfactory yields under mild reaction conditions. The method was proven to be valid for the synthesis of a diverse library of chromeno[3,4-c]pyridines, thiochromeno[3,4-c]pyridines, pyrano[3,4-c]pyridines, and thiopyrano[3,4-c]pyridine derivatives from readily accessible substrates. This experimentally simple
描述了一种在BF 3 ·OEt 2存在下简单有效的一环芳基酮,炔烃和腈的方法。在温和的反应条件下以令人满意的产率获得了高度官能化的各种N-取代的吡啶-稠合的色诺和吡喃衍生物。事实证明,该方法可用于合成各种色素铬并[3,4- c ]吡啶,硫代色素[3,4- c ]吡啶,吡喃并[3,4- c ]吡啶和硫代吡喃并[3,来自容易获得的底物的4- c ]吡啶衍生物。这个实验简单的方案在一锅操作中提供了结构复杂,生物学相关的杂环。