Chinese Journal of Applied Chemistry ›› 2018, Vol. 35 ›› Issue (10): 1190-1200.DOI: 10.11944/j.issn.1000-0518.2018.10.170352

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Boron Trifluoride Diethyl Etherate Catalyzed Synthesis of 1-(Carbamoylmethyl)-2-Aryl/Alkyl-3,1-Benzoxazines

TANG Zilongab*(),WANG Lianab,TAN Jingzhaoab,YAO Yuanab,PENG Lifenga   

  1. aKey Laboratory of Theoretical Organic Chemistry and Functional Molecule,Ministry of Education,Hu'nan University of Science and Technology,Xiangtan,Hu'nan 411201,China
    bSchool of Chemistry and Chemical Engineering,Hu'nan University of Science and Technology,Xiangtan,Hu'nan 411201,China
  • Received:2017-09-26 Accepted:2017-11-24 Published:2018-10-01 Online:2018-10-09
  • Contact: TANG Zilong
  • Supported by:
    Supported by the National Natural Science Foundation of China(No.201372070), the Subproject of National Key Technology R&D Program(No.2011BAE06B01), the Scientific Research Fund of Hunan Provincial Education Department (No.17A066), the Open Project of Key Laboratory of Theoretical Organic Chemistry and Fuctional Molecules of Ministry of Education(No.LKF1506)

Abstract:

Boron trifluoride diethyl etherate(BF3·OEt2)catalyzed reaction of 2-(N-substituted amino)benzyl alcohol with aldehyde was studied, and resulted a new method for the preparation of substituted 3,1-benzoxazine. By this method, a series of novel 1-(carbamoylmethyl)-2-aryl/alkyl-3,1-benzoxazines was prepared. It was found that BF3·OEt2 was a more general catalyst for these reactions than chlorotrimethylsilane and SnCl4 for the reaction and the reason causing this difference was discussed.

Key words: nitrogen heterocycles, substituted 3,1-benzoxazines, synthesis, boron trifluoride diethyl etherate, catalyst