波谱学杂志 ›› 1999, Vol. 16 ›› Issue (5): 423-428.

• 研究论文 • 上一篇    下一篇

N-(6-甲基-2-苯并噻唑基)-α-氨基膦酸二乙酯的1H NMR研究

李在国, 黄润秋, 汪清民, 邵瑞链   

  1. 南开大学元素有机化学研究所, 元素有机国家重点实验室, 天津 300071
  • 收稿日期:1999-04-15 修回日期:1999-07-12 出版日期:1999-10-05 发布日期:2018-01-13
  • 作者简介:李在国,男,1970年出生,博士,讲师
  • 基金资助:
    国家自然科学基金资助项目(No.29832050)及天津市自然科学基金资助项目

THE STUDY ON 1H NMR OF N-(6-METHYL-2-BENZOTHIAZOLYL)-α-AMINOALKYLPHOSPHONIC ACID DIETHYL ESTERS

Li Zaiguo, Huang Runqiu, Wang Qingmin, Shao Ruilian   

  1. Institute and State Key Laboratory of Elemento Organic Chemistry, Nankai University, Tianjin 300071
  • Received:1999-04-15 Revised:1999-07-12 Online:1999-10-05 Published:2018-01-13

摘要: 报道了N-(6-甲基-2-苯并噻唑基)-α-氨基膦酸二乙酯类化合物的1H NMR数据,研究了α位苯环上取代基对α-CH的化学位移的影响.根据单晶结构确定了膦酸二乙酯的两个乙氧基的核磁不等价现象是由α位苯环的屏蔽作用造成的.研究了α位苯环上取代基对α位苯环的屏蔽作用的影响,并利用构象重叠方法解释了邻位取代基对屏蔽作用的影响.

关键词: 1HNMR, X-衍射, α-氨基膦酸二乙酯, 构象优化

Abstract: The 1H NMR data of N-(6-methyl-2 -benzothiazolyl)-α-aminoalkylphosphonic acid diethyl esters are reported, and the substituent effects of α-benzene ring on chemical shifts of α-CH are studied. The crystal structure of one of the title compounds is determined by X-ray diffraction. The two ethoxys of the phosphonates are magnetically nonequivalent, which is caused by the different shielding effects of α-benzene on the two ethoxy groups. The substituent effects of α-benzene on the shielding effect of α-benzene is studied, and the configurational superposition of different molecules is made to elucidate the effect of orthosubstituent on the shielding effect of α-benzene.

Key words: 1H NMR, X-ray diffraction, α-aminoalkylphosphonic acid diethyl ester, Optimum configuration