Chemical Research in Chinese Universities ›› 2016, Vol. 32 ›› Issue (1): 68-75.doi: 10.1007/s40242-016-5233-4

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One-pot Synthesis of α,β-Dehydroamino Derivatives from β,β-Dicyanostyrene with 1,3-Dibromo-5,5-dimethylhydantoin Promoted by Mild Base

CHEN Zhanguo, DU Manfei, XIA Wei, HU Junli   

  1. Key Laboratory for Macromolecular Science of Shaanxi Province, School of Chemistry and Chemical Engineering, Shaanxi Normal University, Xi'an 710119, P. R. China
  • Received:2015-06-12 Revised:2015-07-15 Online:2016-02-01 Published:2015-09-21
  • Contact: CHEN Zhanguo E-mail:chzhg@snnu.edu.cn
  • Supported by:

    Supported by the Natural Science Foundation of Shaanxi Province, China(No.2009JM2001), the Innovation Foundation of Postgraduate Cultivation of Shaanxi Normal University, China(No.2008CXB009) and the Fundamental Research Funds for the Central Universities of China(No.GK261001095).

Abstract:

The reaction of β,β-dicyanostyrene derivatives(1) with 1,3-dibromo-5,5-dimethylhydantoin(DBDMH) was systematicly studied. The reaction could generate different products when promoted by different mild bases. When the reaction was promoted by NaOAc(100%, molar ratio to compound 1), β,β-dicyanostyrene derivatives could be directly converted into corresponding α,β-dehydroamino derivatives in good to excellent yields in one-pot. When the reaction was promoted by K3PO4(80%, molar ratio to compound 1), the corresponding α,β-dehydroamino and double-α,β-dehydroamino compounds were simultaneously obtained and the total conversion of β,β-dicyanostyrene derivatives was up to 90% or higher.

Key words: β,β-Dicyanostyrene derivative, 1,3-Dibromo-5,5-dimethylhydantoin(DBDMH), α,β-Dehydroamino