Zobrazeno 1 - 10
of 33
pro vyhledávání: '"Zh. N. Kashkan"'
Publikováno v:
Chemistry of Natural Compounds. 46:750-755
New derivatives of steroidal 6-ketoximes containing α-chloropyridine neonicotinoid groups characteristic of bioactive compounds were synthesized by formation of oximes of cholestane and stigmastane 3β,5-dihydroxy-6-ketosteroids with O-(2-chloropyri
Autor:
N. Sh. Ramazanov, Yu. G. Chernov, I. D. Bobaev, S. N. Sokolov, N. V. Kovganko, Z. R. Utaeva, Zh. N. Kashkan
Publikováno v:
Chemistry of Natural Compounds. 45:385-388
New esters 2-5 that contain 6-chloropyridine groups characteristic of the alkaloid epibatidine were prepared by acylation of 20-hydroxyecdysone (1) by 6-chloronicotinoylchloride.
Publikováno v:
Chemistry of Natural Compounds. 45:200-204
New esters of 3β,5α,6β-trihydroxysteroids and 3β,5-dihydroxy-6-ketosteroids containing 6-chloropyridine groups characteristic of the alkaloid epibatidine were synthesized by acylation with 6-chloronicotinoylchloride.
Publikováno v:
Chemistry of Natural Compounds. 45:205-208
New steroid derivatives containing 6-chloropyridine groups characteristic of the alkaloid epibatidine and neonicotinoid insecticides were synthesized by reacting 3β,5α,6β-trihydroxysteroids or 3β,5-dihydroxy-6ketosteroids with 2-chloro-5-chlorome
Autor:
Zh. N. Kashkan, N. V. Kovganko
Publikováno v:
Russian Journal of Organic Chemistry. 40:1709-1726
The review discusses methods of synthesis of neonicotinoids which constitute a new group of insecticides structurally related to nicotine and acting as insect acetylcholine receptor agonists.
Autor:
A. N. Eremin, Zh. N. Kashkan, N. V. Kovganko, D. I. Metelitsa, M. V. Potapovich, S. N. Krivenok
Publikováno v:
Chemistry of Natural Compounds. 40:71-74
The kinetics of catalase decomposition of H2O2 (50 mM) inhibited by the flavonolic glycoside astragalin (1) from the aerial part of Gymnocarpium dryopteris were studied. 1 (0.3-30 M) is a strong inhibitor of the catalase process and was tested as a c
Publikováno v:
Chemistry of Natural Compounds. 39:411-437
Literature data published in 1998-2002 on the chemical synthesis of ecdysteroids and their structural analogs were reviewed.
Publikováno v:
Chemistry of Natural Compounds. 38:167-170
The toxicity of steroids 1-14 for Colorado beetle (Leptinotarsa decemlineata Say.) larvae was studied by a contact-intestinal method. The most active are 3β,5α-dihydroxy-6-ketone 4a and 5α-hydroxy-3,6-diketone 8a.
Publikováno v:
Chemistry of Natural Compounds. 38:171-174
The toxicity of 7-substituted steroids 1-8 for Colorado beetle (Leptinotarsa decemlineata Say.) larvae was studied. The most active compound is 3-acetoxy-Δ5-7-ketone 2b.
Autor:
Zh. N. Kashkan, N. V. Kovganko
Publikováno v:
Chemistry of Natural Compounds. 37:47-51
Convenient methods for preparing several 3α,5-cycloandrostanes have been developed in order to synthesize the phytoecdysteroid rubrosterone. Certain of their chemical transformations were studied