高等学校化学学报 ›› 1993, Vol. 14 ›› Issue (3): 353.

• 研究论文 • 上一篇    下一篇

α-羰基烯酮环二硫代缩醛化学(Ⅵ)——β,β-1,3-亚丙二硫基-α,β-不饱和芳酮与烯丙基Grignard试剂加成物脱水反应的研究

刘群1, 董德文1, 杨智蕴1, 胡玉兰1, 景凤英2, 孝延文2   

  1. 1. 东北师范大学化学系, 长春 130024;
    2. 中国科学院长春应用化学研究所
  • 收稿日期:1992-07-20 修回日期:1992-11-16 出版日期:1993-03-24 发布日期:1993-03-24
  • 通讯作者: 刘群

The Chemistry of α-Oxo Ketene Cyclic Dithioacetals(Ⅳ)——Studies on the Dehydration of Adducts of β,β-1,3-Propylene-dithio-α,β-Unsaturated Arylketones with Allyl Grignard Reagents

LIU Qun1, DONG De-Wen1, YANG Zhi-Yun1, HU Yu-Lan1, JING Feng-Ying2, XIAO Yan-Wen2   

  1. 1. Dept.of Chem., Northeast Normal Univ., Changchun, 130024;
    2. Changchun Institute of Afflied Chemistry, Academia Sinica, Changchun
  • Received:1992-07-20 Revised:1992-11-16 Online:1993-03-24 Published:1993-03-24

摘要: 提出了由β,β-1,3-亚丙二硫基-α,β-不饱和芳酮类化合物(1)与苄基氯化镁及烯丙基溴化镁加成所得的醇(2)在BF3·Et2O催化下脱水生成共轭烯烃(3)新的合成途径,合成了13种新化合物,结构经1HN-MR、IR、UV及元素分析等确证.并对这一新合成途径的反应机制进行了讨论.

关键词: &beta, &beta, -1, 3-亚丙二硫基-&alpha, &beta, -不饱和芳酮, 烯丙基Grignard试剂, 脱水反应

Abstract: Anew route for the synthesis of dialkylthio conjugated alkenes (3) has been developed.The addition of β,β-l,3-propylenedithio-α,β-unsaturated arylketones (1) with allyl or benzyl Grig-nard reagents afforded the carbinols (2).The carbinols (2) were converted to the alkenes (3) via dehydration catalyzed by BF3·Et2O.The course of addition of benzyl Grignard reagents to (1) proceeds by regiospecific 1,2-pattern other than the sequential 1,4-, 1,2-addition, which might result from the hindrance of the rigid cyclic dithioalkyl group in (1), the mechanism and reaction condition are discussed.Thirteen new compounds are prepared, their structure are assigned by 1H NMR, IRand UV.

Key words: β,β-1,3-Propylenedithio-α,β-unsaturated arylketones, Allyl Grignard reagent, Dehydration

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