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.
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.