波谱学杂志

• 研究简报 • 上一篇    下一篇

a,a-二(2-羟乙基)苯乙腈分子内环合现象的核磁共振研究

高振华,何小伟,郭永彪,邹传品*


 
  

  1. 北京药物化学研究所,北京 102205
  • 收稿日期:2014-02-21 修回日期:2014-03-05 出版日期:2014-06-05 发布日期:2014-06-05
  • 作者简介:高振华(1986-),男,山东滨州人,硕士研究生,有机合成专业. *通讯联系人:邹传品,电话:010-66758947,E-mail:zou404@gmail.com.

The NMR Study on the Intramolecular Cyclization of a, a-Bis(2-Hydroxyethyl)phenylacetonitrile

GAO Zhen-hua,HE Xiao-wei,GUO Yong-biao,ZOU Chuan-pin*    

  1. Beijing Pharmaceutical Chemistry Institute, Beijing 102205, China

     
  • Received:2014-02-21 Revised:2014-03-05 Online:2014-06-05 Published:2014-06-05
  • About author:*Corresponding author:ZOU Chuan-pin, Tel: 010-66758947, E-mail: zou404@gmail.com.

摘要:

以苯乙腈为原料,在二异丙基氨基锂(LDA)的作用下连续与两分子环氧乙烷反应,一步合成a,a-二(2-羟乙基)苯乙腈(2a).通过对1H NMR、13C NMR、DEPT、HSQC、HMBC等谱图的解析,证明此类化合物存在因分子内环合所致的互变异构现象.该现象可用于解释使用化合物2a为原料,甲磺酰化后再与伯胺反应生成哌啶衍生物产率低下的原因.

关键词: 核磁共振(NMR), 结构解析;2D NMR;a, a-二(2-羟乙基)苯乙腈;互变异构

Abstract:

a, a-Bis(2-hydroxyethyl)phenylacetonitrile (2a) was efficiently synthesized from phenylacetonitrile, lithium diisopropylamide and ethylene oxide by one-pot method. Through the analysis with 1H NMR, 13C NMR, DEPT, HSQC, HMBC spectra, it has proved that there is a tautomerism caused by intramolecular cyclization. This phenomena can be used to explain the low yield of piperidine derivatives synthesized from compounds 2avia mesylation and cyclization.

Key words: NMR, structure analysis, 2D NMR, a, a-bis(2-hydroxyethyl), tautomerism

中图分类号: