Syntheses of trifluoroethylated unsymmetrical 1,3-diynes by using 1,1-dichloro-2,2,2-trifluoroethane
作者:Jian Zheng、Qing-Yun Chen、Ke Sun、Yangen Huang、Yong Guo
DOI:10.1016/j.tetlet.2016.11.015
日期:2016.12
reaction of terminal 1,3-diynes with 1,1-dichloro-2,2,2-trifluoroethane (CF3CHCl2) using ethanolamine as ligand gave trifluoroethylated unsymmetrical 1,3-diynes in moderate to good yields. The reaction were carried out under mild conditions, and were easy to operate. Aryl groups with weak electron-withdrawing group or electron-donating group, and alkyl substitutents at terminal 1,3-diynes were tolerated
使用乙醇胺作为配体的末端1,3-二炔与1,1-二氯-2,2,2-三氟乙烷(CF 3 CHCl 2)的铜介导反应以中等至良好的产率得到三氟乙基化的不对称1,3-二炔。该反应在温和的条件下进行,并且易于操作。具有较弱的吸电子基团或供电子基团的芳基,以及在1,3-二炔末端的烷基取代基是可容忍的。用该方法合成了三氟乙基化的共轭三炔。成功地实现了三氟乙基化的不对称1,3-二炔的进一步转化以提供三氟乙基取代的1,2,3-三唑和异恶唑作为应用实例。