有机化学 ›› 2019, Vol. 39 ›› Issue (12): 3542-3549.DOI: 10.6023/cjoc201904063 上一篇    下一篇

研究论文

CO2调控邻卤苯腈硫解选择性合成邻卤硫代苯甲酰胺类衍生物

桑国智, 冯雪童, 陈鹃, 李闪闪, 李卓娜, 李潇, 韩利民, 洪海龙, 竺宁   

  1. 内蒙古工业大学化工学院 内蒙古自治区CO2捕集与资源化工程技术研究中心 呼和浩特 010051
  • 收稿日期:2019-04-25 修回日期:2019-07-05 发布日期:2019-08-01
  • 通讯作者: 竺宁 E-mail:zhuning2622@yahoo.com
  • 基金资助:
    国家自然科学基金(Nos.21865020,21362019)、内蒙古自然科学基金(No.2019LH02009)和2019年度内蒙古自治区高等学校“青年科技英才支持计划”资助项目.

Synthesis of o-Halothiobenzamide Derivatives from the Selective Thiolysis Reaction of o-Halobenzonitrile Mediated by CO2

Sang Guozhi, Feng Xuetong, Chen Juan, Li Shanshan, Li Zhuona, Li Xiao, Han Limin, Hong Hailong, Zhu Ning   

  1. Inner Mongolia Engineering Research Center for CO2 Capture and Utilization, Chemical Engineering College, Inner Mongolia University of Technology, Hohhot 010051
  • Received:2019-04-25 Revised:2019-07-05 Published:2019-08-01
  • Supported by:
    Project supported by the National Natural Science Foundation of China (Nos. 21865020, 21362019), the Natural Science Foundation of Inner Mongolia (No. 2019LH02009), and the Program for Young Talents of Science and Technology in Universities of Inner Mongolia Autonomous Region (2019).

探索了一种在CO2作用下邻卤苯腈与NaHS发生硫解反应选择性合成邻卤硫代苯甲酰胺的方法.在该方法中,CO2/H2O/NaHS缓冲体系为HS-离子选择性进攻腈基转化为目标产物提供适宜的pH环境,同时为反应持续提供氢质子.进一步研究发现,CO2/Na2S·9H2O缓冲体系也同样能够高效地发生硫解反应选择性合成邻卤硫代苯甲酰胺.该合成方法简单、高效、原子经济性好,对不同取代的邻卤苯腈具有较好的底物适用性.

关键词: 卤代苯腈, 硫解反应, 卤代硫代苯甲酰胺, 二氧化碳, 硫氢化钠

A method for the selective synthesis of o-halothiobenzamide by thiolysis reaction of o-halobenzonitrile with NaHS under the action of CO2 was explored. CO2/H2O/NaHS was used as a buffer system to provide a suitable pH environment, which would make HS- attack the nitrile-based carbon selectively to produce the corresponding o-halothiobenzamide. Moreover, the buffer system also provided the additionally required hydrogen atom for the thiolysis reaction of o-haloben-zonitrile with NaHS. Further studies have found that the CO2/Na2S·9H2O buffer system could also efficiently promote the thiolysis reaction of o-halobenzonitrile to form the corresponding o-halothiobenzamide. This synthetic method could be used to prepare different substituted o-halobenzonitriles, which is a simple, efficient and high atom-economic reaction.

Key words: halobenzonitriles, thiolysis reaction, halohiobenzamide, carbon dioxide, NaHS