Synthesis of 1,6-Dihydropyridine-3-carbonitrile Derivatives <i>via</i> Lewis Acid-Catalyzed Annulation of Propargylic Alcohols with (<i>E</i>)-3-Amino-3-phenylacrylonitriles
作者:Li-Juan Du、Yuecheng Zhang、Hong-Yu Zhang、Guohui Yin、Xiao-Yan Wang、Jiquan Zhao、Ya-Ping Han
DOI:10.1021/acs.joc.0c01171
日期:2020.8.7
acid-catalyzed, highly efficient, practical, and atom-economical protocol for the synthesis of functionalized 1,2-dihydropyridine-3-carbonitrile derivatives in the presence of Bi(OTf)3 (10 mol %) in tetrahydrofuran (2.0 mL) at 80 °C for 8 h in air is described, starting from readily accessed propargylic alcohols and (E)-3-amino-3-phenylacrylonitriles. This cycloaddition protocol, which is scalable and
一种新颖的路易斯酸催化,高效,实用且原子经济的方案,用于在四氢呋喃(2.0)中存在Bi(OTf)3(10 mol%)的情况下合成官能化的1,2-二氢吡啶-3-腈衍生物描述了在80°C下于空气中8小时的操作,从容易获得的炔丙醇和(E)-3-氨基-3-苯基丙烯腈开始。这种环加成方案可扩展并在温和条件下进行,适用于有价值的1,2-二氢吡啶-3-腈的克级构建。此外,广泛的炔丙醇和(E)-3-氨基-3-苯基丙烯腈证明了良好的官能团相容性和该策略的广泛范围,产率为34%至96%。