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| Format: | Artículo científico |
| Language: | en |
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Sociedad Química de México
2002
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| Online Access: | https://www.redalyc.org/articulo.oa?id=47546314 |
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| _version_ | 1866812451466510336 |
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| author | Erika Vázquez |
| author_facet | Erika Vázquez |
| contents | Triterpenes, Phenols, and Other Constituents from the leaves of Ochroma pyramidale(Balsa Wood, Bombacaceae). Preferred Conformations of 8-C-b-D-Glucopyranosyl-apigenin (vitexin) Erika Vázquez Esteban M. Martínez Juan Antonio Cogordán Guillermo Delgado Multidisciplinaria (Ciencias Naturales y Exactas) phenols sterols vitexin balsa wood Bombacaceae Lupeol, oleanolic acid, stigmasterol, b-sitosterol, b-sitosteryl-b-D-glucopyranoside, catechin, epi-catechin, and 8-C-b-Dglucopyranosylapigenin(vitexin) were isolated from the acetonicextract of the leaves of Ochroma pyramidale(balsa wood, Bombacaceae),a tree noted by its exceedingly light wood. 1H and 13C NMRof 8-C-b-D-glucopyranosyl-apigenin (vitexin) at room temperatureexhibited doubling of some signals, suggesting the presence of atropisomers.1H NMR spectra at 70 °C showed one set of signals, confirmingthe presence of rotational isomers at room temperature.Molecular modelling using AM1 methods, established the two conformationsof minimum energy for vitexin, which correspond to theac(w = 94 °) and +ac(w = + 96 °) arrangement along the C(2)-C(1)-C(8)-C(7) bonds. 2002 artículo científico 1870-249X https://www.redalyc.org/articulo.oa?id=47546314 en http://www.redalyc.org/revista.oa?id=475 Journal of the Mexican Chemical Society application/pdf Sociedad Química de México Journal of the Mexican Chemical Society (México) Num.3 Vol.46 |
| format | Artículo científico |
| id | redalyc_47546314 |
| language | en |
| publishDate | 2002 |
| publisher | Sociedad Química de México |
| spellingShingle | Triterpenes, Phenols, and Other Constituents from the leaves of Ochroma pyramidale(Balsa Wood, Bombacaceae). Preferred Conformations of 8-C-b-D-Glucopyranosyl-apigenin (vitexin) Erika Vázquez Multidisciplinaria (Ciencias Naturales y Exactas) phenols sterols vitexin balsa wood Bombacaceae Triterpenes, Phenols, and Other Constituents from the leaves of Ochroma pyramidale(Balsa Wood, Bombacaceae). Preferred Conformations of 8-C-b-D-Glucopyranosyl-apigenin (vitexin) Erika Vázquez Esteban M. Martínez Juan Antonio Cogordán Guillermo Delgado Multidisciplinaria (Ciencias Naturales y Exactas) phenols sterols vitexin balsa wood Bombacaceae Lupeol, oleanolic acid, stigmasterol, b-sitosterol, b-sitosteryl-b-D-glucopyranoside, catechin, epi-catechin, and 8-C-b-Dglucopyranosylapigenin(vitexin) were isolated from the acetonicextract of the leaves of Ochroma pyramidale(balsa wood, Bombacaceae),a tree noted by its exceedingly light wood. 1H and 13C NMRof 8-C-b-D-glucopyranosyl-apigenin (vitexin) at room temperatureexhibited doubling of some signals, suggesting the presence of atropisomers.1H NMR spectra at 70 °C showed one set of signals, confirmingthe presence of rotational isomers at room temperature.Molecular modelling using AM1 methods, established the two conformationsof minimum energy for vitexin, which correspond to theac(w = 94 °) and +ac(w = + 96 °) arrangement along the C(2)-C(1)-C(8)-C(7) bonds. 2002 artículo científico 1870-249X https://www.redalyc.org/articulo.oa?id=47546314 en http://www.redalyc.org/revista.oa?id=475 Journal of the Mexican Chemical Society application/pdf Sociedad Química de México Journal of the Mexican Chemical Society (México) Num.3 Vol.46 |
| title | Triterpenes, Phenols, and Other Constituents from the leaves of Ochroma pyramidale(Balsa Wood, Bombacaceae). Preferred Conformations of 8-C-b-D-Glucopyranosyl-apigenin (vitexin) |
| topic | Multidisciplinaria (Ciencias Naturales y Exactas) phenols sterols vitexin balsa wood Bombacaceae |
| url | https://www.redalyc.org/articulo.oa?id=47546314 |