第 50 卷第 2 期Vol. 50 No. 2
2020 年 4 月Apr 2020

所属栏目:医药及中间体

五硫化二磷促进醛肟制备伯硫代酰胺的研究
王耀天,王 仪,黄学聪,李江胜* (长沙理工大学 化学与食品工程学院,湖南 长沙 410117)
摘 要:建立了芳香醛肟在五硫化二磷作用下直接转化成伯硫代酰胺的方法,优化工艺条件为:n(肟)∶n(五硫化二磷)=1∶1,反应温度为80 ℃,干燥苯为溶剂。在此优化条件下,合成了九种伯硫代酰胺,分离收率为74%~90%。研究表明,五硫化二磷在反应中既是脱水剂,亦是硫化试剂;方法操作简单,官能团耐受性好,适合放大生产。
关键词:硫代酰胺;肟;Beckmann重排;合成
中图分类号:O623.626  文献标识码:A  文章编号:1009-9212(2020)02-0037-04
Synthesis of Primary Thioamides from Aldoximes Mediated by P2S5
WANG Yao-tian, WANG Yi, HUANG Xue-cong, LI Jiang-sheng* (School of Chemistry and Food Engineering, Changsha University of Science & Technology, Changsha 410117, China)
Abstract:A method for the synthesis of primary thioamides from aromatic aldoximes mediated by phosphorous pentasulfide (P2S5) was established. The optimized reaction conditions were as follows: the molar ratio of oxime to P2S5 of 1∶1; the reaction temperature of 80 ℃; dried benzene as the best solvent. Under the optimal conditions, nine primary thioamides were synthesized in isolated yields of 74%~90%. The results showed that phosphorous pentasulfide served both as a dehydrating reagent and a thionation reagent. In addition, this method has advantages including easy operation, good functional group tolerance, and applicability to large scale production.
Key words:thioamides; oximes; Beckmann rearrangement; synthesis
基金项目:长沙市科技计划项目(kq1801053),长沙理工大学大学生研究性学习与创新性实验计划项目。
作者简介:王耀天(1999-),女,辽宁铁岭人,研究方向:有机合成(E-mail:1786540918@qq.com)。
联 系 人: 李江胜,副教授,研究方向:有机合成方法学(E-mail:jsli@csust.edu.cn)。
收稿日期:2020-04-20