Results 151 to 160 of about 62,775,292 (207)
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Transformation of 20‐Hydroxyecdysone Acetonides into Podecdysone B.
ChemInform, 2003AbstractFor Abstract see ChemInform Abstract in Full Text.
V. N. Odinokov +4 more
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Synthesis of 20-hydroxyecdysone 25-acetate
Chemistry of Natural Compounds, 1997A scheme has been developed for the selective conjugation of 20-hydroxyecdysone (20E) at the 25- position, with the synthesis of 20E 25-acetate as an example. The proposed scheme also permits the selective, synthesis of 20E 22-esters from both lower and higher fatty acids, which opens up prospects for the creation from them of drugs with a prolonged ...
N. K. Politova +3 more
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Tetrahedron, 2004
The ecdysteroid analogues 2,3-diepi-20-hydroxyecdysone and 2,3-diepi-5α-20-hydroxyecdysone have been synthesized from the readily available ecdysteroid, 20-hydroxyecdysone, and moulting activity has been determined using the Musca bioassay. As expected, the 2,3-diepi-analogue was less active than the parent ecdysteroid, 20-hydroxyecdysone. However, the
Sureeporn Homvisasevongsa +3 more
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The ecdysteroid analogues 2,3-diepi-20-hydroxyecdysone and 2,3-diepi-5α-20-hydroxyecdysone have been synthesized from the readily available ecdysteroid, 20-hydroxyecdysone, and moulting activity has been determined using the Musca bioassay. As expected, the 2,3-diepi-analogue was less active than the parent ecdysteroid, 20-hydroxyecdysone. However, the
Sureeporn Homvisasevongsa +3 more
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20-hydroxyecdysone oximes and their rearrangement into lactams
Russian Journal of Organic Chemistry, 2009(E)-Oximes derived from 20-hydroxyecdysone diacetonides and 7,8-dihydro analog were converted into the corresponding lactams (6-oxo-5a-aza-5a-homo derivatives) via Beckmann rearrangement. 14,15-Anhydro-20-hydroxyecdysone (Z)-oxime under analogous conditions (reaction with p-toluenesulfonyl chloride in acetone in the presence of Na2CO3) gave rise to 20 ...
R. V. Shafikov +5 more
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Regioselective synthesis of 20-hydroxyecdysone glycosides
Tetrahedron, 1994Abstract Four β-D-glucopyranosides of 20-hydroxyecdysone (1) were prepared.
Jaroslav Píš +3 more
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Synthesis of 20-hydroxyecdysone 6-chloronicotinates
Chemistry of Natural Compounds, 2009New esters 2-5 that contain 6-chloropyridine groups characteristic of the alkaloid epibatidine were prepared by acylation of 20-hydroxyecdysone (1) by 6-chloronicotinoylchloride.
I. D. Bobaev +6 more
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Transformation of 20‐Hydroxyecdysone to Inokosterone (III)
ChemInform, 2006AbstractChemInform is a weekly Abstracting Service, delivering concise information at a glance that was extracted from about 200 leading journals. To access a ChemInform Abstract, please click on HTML or PDF.
Rimma G. Savchenko +3 more
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Synthesis of 20-Hydroxyecdysone Carboxylate Esters
Chemistry of Natural Compounds, 2017Acylation of 20-hydroxy-2,3-O-isopropylideneecdysone (2) by carboxylic-acid anhydrides produced ecdysteroid derivatives containing various organic acids (5–12).
I. D. Bobaev +5 more
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Preparation of 20-hydroxyecdysone-22-benzoate
Chemistry of Natural Compounds, 2004Tashkent, fax (99871) 120 64 75; 2) Universite Rene Descartes, Laboratoire de Chimie et Biochimie Pharmacologiques et Toxicologiques, France; 3) Universite Pierre et Marie Curie Endocrinologie Moleculaire et Evolution, France. Translated from Khimiya Prirodnykh Soedinenii, No. 5, pp. 401-403, September-October, 2004. Original article submitted June 28,
N. Z. Mamadalieva +4 more
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Ovarian Maturation in Stable Flies: Inhibition by 20-Hydroxyecdysone
Science, 1971The steroid 20-hydroxyecdysone when given by mouth inhibits ovarian maturation in the stable fly, Stomoxys calcitrans (L.). by preventing lipid synthesis necessary for vitellogenesis in the developing oocyte.
J E, Wright +2 more
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