Synthesis and study of some 4-aza and 17a-azasteroidal isoxazoles
作者:Ranju Gupta、Devender Pathak、Dharam P. Jindal
DOI:10.1016/s0223-5234(00)80035-5
日期:1999.7
4-Aza-5 alpha-androstano[2,3-d]isoxazole 4 and 17a-aza-D-homo-5-androsteno[17,16-c]isoxazole 7 have been prepared by treating alpha,beta-unsaturated-beta-chloroaldehydes 3 and 6 [1, 2] with hydroxylamine hydrochloride in pyridine. [16,17-d]Isoxazole derivatives 4 and 8 were found to be unstable in most of the organic solvents. beta-Cyanolactam derivatives 5 and 9 have also been prepared in both the
Synthesis and biological activity of azasteroidal [3,2-c]- and [17,16-c]pyrazoles
作者:R Gupta、D Pathak、DP Jindal
DOI:10.1016/0223-5234(96)89140-9
日期:1996.1
Cholesterol, testosterone acetate and dehydroepiandrosterone acetate were used as starting materials for the preparation of azasteroidal [3,2-c]- and [17,16-c]pyrazole derivatives. In case of the 4-aza androstane series, a mixture of 5 alpha/5 beta epimers 8 was obtained, which were separated by chemical methods. The compounds 4, 5, 10, 12, 13, 15, 16 and 18-22 were screened for antiinflammatory activity using the carrageenan rat paw oedema model. Oxirane 22 was found to be around ten times more potent than hydrocortisone. Evaluation of compounds 14, 18 and 19 for their antineoplastic activity was also carried out at the National Cancer Institute, Bethesda, MD, USA, using standard procedures.