Synthesis and Characterization of Cyanobutadiene Isomers—Molecules of Astrochemical Significance
作者:Samuel M. Kougias、Stephanie N. Knezz、Andrew N. Owen、Rodrigo A. Sanchez、Grace E. Hyland、Daniel J. Lee、Aatmik R. Patel、Brian J. Esselman、R. Claude Woods、Robert J. McMahon
DOI:10.1021/acs.joc.9b03388
日期:2020.5.1
considerable interest to the organic chemistry, molecular spectroscopy, and astrochemistry communities were synthesized in good yields and isolated as pure compounds: (E)-1-cyano-1,3-butadiene (E-1), (Z)-1-cyano-1,3-butadiene (Z-1), 4-cyano-1,2-butadiene (2), and 2-cyano-1,3-butadiene (3). A diastereoselective synthesis was developed to generate (E)-1-cyano-1,3-butadiene (1) (10:1 E/Z) via tandem SN2 and E2'
以良好的产率合成了有机化学,分子光谱学和天化学界相当感兴趣的四种氰基丁二烯异构体,并分离为纯净化合物:(E)-1-氰基-1,3-丁二烯(E-1),(Z) -1-氰基-1,3-丁二烯(Z-1),4-氰基-1,2-丁二烯(2)和2-氰基-1,3-丁二烯(3)。通过串联SN2和E2'反应,开发了非对映选择性合成以生成(E)-1-氰基-1,3-丁二烯(1)(10:1 E / Z)。通过密度泛函理论计算分析了导致(E)-和(Z)-1-氰基-1,3-丁二烯(1)的E2'反应的势能面,并在以下条件下合理化了观察到的非对映选择性Curtin-Hammett原则。这些反应性化合物的纯样品的制备可以测量其实验室旋转光谱,