Synthesis of Cytotoxic 6E-Hydroximino-4-ene Steroids: Structure/Activity Studies
摘要:
In an effort to determine the pharmaceutical utility and the structural requirements for activity against various tumor cell lines, several 6E-hydroximino-4-ene steroids with different side chains and degrees of unsaturation on ring A were synthesized in our laboratory. Evaluation of the synthesized compounds for cytotoxicity against P-388, A-549, HT-29, and MEL-28 tumor cells revealed that some important structural features are required for activity. The presence of a cholesterol-type side chain, which appears to play a major role in determining the biological activity, the existence of a ketone functionality at C-3, and an elevated degree of oxidation on ring A all result in higher bioactivity than other structural motifs.
Synthesis of Cytotoxic 6E-Hydroximino-4-ene Steroids: Structure/Activity Studies
摘要:
In an effort to determine the pharmaceutical utility and the structural requirements for activity against various tumor cell lines, several 6E-hydroximino-4-ene steroids with different side chains and degrees of unsaturation on ring A were synthesized in our laboratory. Evaluation of the synthesized compounds for cytotoxicity against P-388, A-549, HT-29, and MEL-28 tumor cells revealed that some important structural features are required for activity. The presence of a cholesterol-type side chain, which appears to play a major role in determining the biological activity, the existence of a ketone functionality at C-3, and an elevated degree of oxidation on ring A all result in higher bioactivity than other structural motifs.
Circular dichroism of steroidal and related cisoid α,β-unsaturated ketones. Part I.
作者:Jadwiga Frelek、Wojciech J. Szczepek、Hans Peter Weiß
DOI:10.1016/s0957-4166(00)86086-3
日期:1993.3
Some steroidal and related cisoid conjugated enones have been synthesized and their circular dichroism (CD) has been investigated. The relation between structure and observed Cotton effects (CE's) is discussed in terms of previously published rules. It is shown that CD spectra of these compounds are influenced by substituents located in the allylic axial or equatorial as well as α′-axial or equatorial
Aus Litho-, Desoxy- und Chenodesoxycholsäure (1a – c) wurden über die Homosäuren 5a – c die tert.-C25-Carbinole 7a – c dargestellt. Cholesterin ließ sich in das Ecdyson-analoge Produkt 18b umwandeln. Hyodesoxy- und Homohyodesoxycholsäure wurden in die Tetrole 33a, b übergeführt. Aus 34a – d wurden die Steroide 37a – d mit diosphenolischer Struktur gewonnen.
AUS Litho-,Desoxy- UNDChenodesoxycholsäure(1A - C ^)wurden黚死Homosäuren 5A - Ç模具叔-C 25 -Carbinole 7A - Ç dargestellt。位于Das Ecdyson-Analoge Produkt 18b umwandeln中的胆固醇。Hyodesoxy- UNDHomohyodesoxycholsäurewurden裸片Tetrole部33a,b übergeführt。Aus 34a – d沸腾的硬脂酸酯37a – d mit diosphenolischer Struktur gewonnen。
Synthesis and plant growth promoting activity of polyhydroxylated ketones bearing the 5α-hydroxy-6-oxo moiety and cholestane side chain
作者:Anielka Rosado-Abón、Guadalupe de Dios-Bravo、Rogelio Rodríguez-Sotres、Martín A. Iglesias-Arteaga
DOI:10.1016/j.steroids.2012.01.004
日期:2012.4
Three polyhydroxylated ketones bearing the 5alpha-hydroxy-6-oxo moiety were obtained from cholesterol. Two of them show plantgrowthpromoting activity in the bean's second internode bioassay. The obtained results indicate that the presence of the 5alpha-hydroxy-6-oxo moiety may be capable to induce plantgrowth promotion even the absence oxygenated functions in the side chain.
Kocovsky,P.; Cerny,V., Collection of Czechoslovak Chemical Communications, 1977, vol. 42, p. 163 - 172
作者:Kocovsky,P.、Cerny,V.
DOI:——
日期:——
Synthesis of Cytotoxic 6<i>E</i>-Hydroximino-4-ene Steroids: Structure/Activity Studies
作者:Noé Deive、Jaime Rodríguez、Carlos Jiménez
DOI:10.1021/jm010867n
日期:2001.8.1
In an effort to determine the pharmaceutical utility and the structural requirements for activity against various tumor cell lines, several 6E-hydroximino-4-ene steroids with different side chains and degrees of unsaturation on ring A were synthesized in our laboratory. Evaluation of the synthesized compounds for cytotoxicity against P-388, A-549, HT-29, and MEL-28 tumor cells revealed that some important structural features are required for activity. The presence of a cholesterol-type side chain, which appears to play a major role in determining the biological activity, the existence of a ketone functionality at C-3, and an elevated degree of oxidation on ring A all result in higher bioactivity than other structural motifs.