STRUCTURE AND CONFORMATIONAL MOBILITY OF SUBSTITUTED IMIDAZODIAZEPINEDIONES

被引：0
|
作者：
SHAPIRO, YE
IVANOV, EI
PYKHTEEVA, EG
YAROSHCHENKO, NM
GORBATYUK, VY
KALAYANOV, GD
机构：
来源：
JOURNAL OF STRUCTURAL CHEMISTRY | 1992年 / 33卷 / 06期
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中图分类号：
O61 [无机化学];
学科分类号：
070301 ; 081704 ;
摘要：
Two-dimensional (NOESY) and dynamic H-1 NMR spectroscopy was used to determine the structure and conformational mobility of substituted 1,4,7-trimethyl-4,5,-7,8-6H-imidazo[4,5-e][1,4]-diazpene-5,6-diones, which are cyclic homologs of caffeine, a natural alkaloid. C-13 NMR spectroscopy was used to determine the activation energy for inversion of the seven-membered ring, which was related to the electronic effect of substituents. Computer models were obtained for the predominant conformations of the compounds studied.
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页码：853 / 858
页数：6
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