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

所屬欄目:醫藥及中間體

五硫化二磷促進(jìn)醛肟制備伯硫代酰胺的研究
王耀天,王 儀,黃學(xué)聰,李江勝* (長(cháng)沙理工大學(xué) 化學(xué)與食品工程學(xué)院,湖南 長(cháng)沙 410117)
摘 要:建立了芳香醛肟在五硫化二磷作用下直接轉化成伯硫代酰胺的方法,優(yōu)化工藝條件為:n(肟)∶n(五硫化二磷)=1∶1,反應溫度為80 ℃,干燥苯為溶劑。在此優(yōu)化條件下,合成了九種伯硫代酰胺,分離收率為74%~90%。研究表明,五硫化二磷在反應中既是脫水劑,亦是硫化試劑;方法操作簡(jiǎn)單,官能團耐受性好,適合放大生產(chǎn)。
關(guān)鍵詞:硫代酰胺;肟;Beckmann重排;合成
中圖分類(lèi)號:O623.626  文獻標識碼:A  文章編號: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
基金項目:長(cháng)沙市科技計劃項目(kq1801053),長(cháng)沙理工大學(xué)大學(xué)生研究性學(xué)習與創(chuàng )新性實(shí)驗計劃項目。
作者簡(jiǎn)介:王耀天(1999-),女,遼寧鐵嶺人,研究方向:有機合成(E-mail:1786540918@qq.com)。
聯(lián) 系 人: 李江勝,副教授,研究方向:有機合成方法學(xué)(E-mail:jsli@csust.edu.cn)。
收稿日期:2020-04-20
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