کد مقاله | کد نشریه | سال انتشار | مقاله انگلیسی | نسخه تمام متن |
---|---|---|---|---|
1409694 | 1501829 | 2011 | 10 صفحه PDF | دانلود رایگان |
عنوان انگلیسی مقاله ISI
A comparative study of dynamic NMR spectroscopy in analysis of selected N-alkyl-, N-acyl-, and halogenated cytisine derivatives
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کلمات کلیدی
موضوعات مرتبط
مهندسی و علوم پایه
شیمی
شیمی آلی
پیش نمایش صفحه اول مقاله

چکیده انگلیسی
New halogenated derivatives of (-)-cytisine were synthesized: 3-bromo-N-acetylcytisine, 5-bromo-N-acetylcytisine, 3,5-dibromo-N-acetylcytisine, 3-iodo-N-acetylcytisine, 5-iodo-N-acetylcytisine, 3,5-diiodo-N-acetylcytisine. Their structures were established on the basis of their NMR spectra and X-ray diffraction method. The crystal structures confirmed the chair conformation of ring C, while in solution all these compounds are in cis–trans conformational equilibrium with ring C in chair and boat conformation. Additionally, the correct X-ray structure of N-benzylcytisine was resolved.
ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: Journal of Molecular Structure - Volume 985, Issues 2–3, 31 January 2011, Pages 157–166
Journal: Journal of Molecular Structure - Volume 985, Issues 2–3, 31 January 2011, Pages 157–166
نویسندگان
Anna K. Przybył, Maciej Kubicki,