کد مقاله کد نشریه سال انتشار مقاله انگلیسی نسخه تمام متن
1402854 1501762 2013 9 صفحه PDF دانلود رایگان
عنوان انگلیسی مقاله ISI
One pot synthesis of biologically active pregnane derivatives, their single crystal structures, spectroscopic characterization and theoretical calculations
موضوعات مرتبط
مهندسی و علوم پایه شیمی شیمی آلی
پیش نمایش صفحه اول مقاله
One pot synthesis of biologically active pregnane derivatives, their single crystal structures, spectroscopic characterization and theoretical calculations
چکیده انگلیسی


• One pot synthesis of compounds 4 and 5 using Collins reagent and 1,5-pentanediol/BF3 described.
• Compounds 4 and 5 characterized with the aid of 1H, 13C NMR, IR, UV, ESI-MS and ESI-HRMS.
• Single crystal studies of 4 and 5 established ring conformation, chain orientations and H-bonding.
• Quantum chemical calculations performed using Density Functional Theory.
• Compounds 4 and 5 evaluated for anti-hyperlipidemic and anti-oxidant activity.

One pot allylic oxidation of 3β-acetoxypregna-5,16-diene-20-one (2) and nucleophilic addition at C-16 position of 3β-hydroxypregna-5,16-diene-20-one (3) yielded 3β-acetoxypregna-5,16-diene-7,20-dione (4) and 3β-hydroxy-16α-(5′-hydroxypentyloxy)-pregn-5-ene-20-one (5) respectively in high yield. A detailed theoretical study supported by X-ray analysis of compounds 4 and 5 has been carried out. Conformational analysis of compounds 4 and 5 was done with the help of crystal structure, which crystallize out in orthorhombic form having P212121 space group. Structural characterization of compounds 4 and 5 was done with the aid of 1H, 13C NMR, IR, UV, ESI-MS and ESI-HRMS. The molecular geometries and vibrational frequencies for compounds 4 and 5 in the ground state were calculated using the Density functional theory (DFT) with 6-31G(d,p) basis set and compared with experimental data. 1H and 13C nuclear magnetic resonance magnetic shifts of 4 and 5 were calculated using GIAO method and compared with the experimental data. UV–Vis spectra of both the compounds were recorded and electronic properties such as HOMO–LUMO energies were calculated by time dependent TD-DFT approach. The compounds were screened for their anti-hyperlipidemic and anti-oxidant activity.

ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: Journal of Molecular Structure - Volume 1052, 25 November 2013, Pages 76–84
نویسندگان
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