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2010
DOI: 10.1016/j.molstruc.2010.04.030
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NMR and X-ray studies of isomeric 22,23-dihydroxy stigmastanes

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Cited by 3 publications
(3 citation statements)
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“…Consequently, in all conformers of most biologically active molecule 1 both hydroxyl groups of the side chain are directed to the sterically free α-face of the steroid plane, and in molecule 3 they have the opposite orientation. This result agrees with the experimental data obtained by NMR spectroscopy [8,16]. It can be suggested that the low-energy conformations gained by the side chain of molecule 1 are biologically significant because they enable an unhindered participation of the α-oriented O5H-and O6H-hydroxyl groups in biochemical processes in plants.…”
Section: Resultssupporting
confidence: 89%
“…Consequently, in all conformers of most biologically active molecule 1 both hydroxyl groups of the side chain are directed to the sterically free α-face of the steroid plane, and in molecule 3 they have the opposite orientation. This result agrees with the experimental data obtained by NMR spectroscopy [8,16]. It can be suggested that the low-energy conformations gained by the side chain of molecule 1 are biologically significant because they enable an unhindered participation of the α-oriented O5H-and O6H-hydroxyl groups in biochemical processes in plants.…”
Section: Resultssupporting
confidence: 89%
“…The 22,23-dihydroxylated steroid (205) [88] was used as a starting compound for the preparation of 22-and 23-oxo-BS (Scheme 6.37) [89]. The attempts of the diol (205) selective acylation failed.…”
Section: Bs Analogsmentioning
confidence: 99%
“…В результате во всех конформерах наиболее биологически активной молекулы (1) обе гидроксильные группы боковой цепи направлены к стерически свободной α-грани стероидальной плоскости, а в наименее активной молекуле (3) -ориентированы в противоположном направлении. Этот результат согласуется с экспериментальными данными, полученными методом спектроскопии ЯМР [8,21]. Можно предположить, что низкоэнергетические конформации, которые принимает боковая цепь молекулы (1), являются биологически значимыми, поскольку делают возможным беспрепятственное участие -ориентированных О5Н и О6Н гидроксильных групп в биохимических процессах в растениях.…”
Section: > (22s23s)-гомобрассинолид (4) > (22s23s)-24-эпибрассинолиunclassified