کد مقاله | کد نشریه | سال انتشار | مقاله انگلیسی | نسخه تمام متن |
---|---|---|---|---|
1408763 | 1501770 | 2013 | 6 صفحه PDF | دانلود رایگان |
عنوان انگلیسی مقاله ISI
Synthesis, spectroscopic, structural and conformational study of some tri-substituted ureas derived from N-methylpiperazine containing phenyl and N-heterocyclic substituents
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کلمات کلیدی
موضوعات مرتبط
مهندسی و علوم پایه
شیمی
شیمی آلی
پیش نمایش صفحه اول مقاله
چکیده انگلیسی
A series of tri-substituted ureas containing an N-methylpiperazine moiety as well as phenyl and N-heterocyclic substituents were synthesized and studied by 1H, 13C NMR and IR spectroscopies. From 1H and 13C NMR data, in CDCl3 solution at room temperature, a fast inter-conversion of the piperazine ring with the N-CH3 group in equatorial position can be proposed. Amino–imino tautomerism is observed for both thiazole and benzothiazole derivatives. Moreover, with the exception of the imino form of the thiazole derivative, the aryl substituted N-carbamoyl group rotates freely. IR data show that the compounds adopt a planar trans conformation of the CONH moiety.
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ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: Journal of Molecular Structure - Volume 1044, 24 July 2013, Pages 215–220
Journal: Journal of Molecular Structure - Volume 1044, 24 July 2013, Pages 215–220
نویسندگان
I. Iriepa, J. Bellanato,