Synthesis of novel D-ring fused 7′-aryl-androstano[17,16-d][1,2,4] triazolo[1,5-a]pyrimidines
摘要:
The preparation of novel steroidal heterocycles containing the 7-aryl-substituted 1,2,4-triazolo [1,5-a]pyrimidine moiety fused to the 16,17-positions of the steroid nucleus is described. The Aldol reaction of 4-aza-androst-3,17-dione (la) and dehydroepiandrosterone (DHEA, 1b) with aromatic aldehydes was catalyzed by KF/Al2O3 to give the corresponding 3-oxo-4-aza-5 alpha- and 3 beta-hydroxy-5-en-16-arylidene-17-ketosteroids (2a-r). Subsequently, the intermediates 2a-r reacted with dinucleophilic 3-amino-1,2,4-triazole in presence of t-BuOK to afford the title compounds (3a-r). All the synthesized heterosteroids are new and are currently being evaluated for their biological activities. (C) 2011 Elsevier Inc. All rights reserved.
Synthesis and biological evaluation of novel steroidal[17,16-d][1,2,4]triazolo[1,5-a]pyrimidines
作者:Li-Hua Huang、Yong-Fei Zheng、Yong-Zheng Lu、Chuan-Jun Song、Yan-Guang Wang、Bin Yu、Hong-Min Liu
DOI:10.1016/j.steroids.2012.03.002
日期:2012.5
The preparation of steroidal[17,16-d][1,2,4]triazolo[1,5-a]pyrimidines and their biological evaluation as potential anticancer agents are herein reported. These novel heterosteroids (2, 4) were prepared through the condensation reaction of 3-amino-1,2,4-triazole with 16-arylidene-17-ketosteroids (1, 3). All the synthesized compounds were evaluated for their anticancer activity in vitro against PC-3 (human prostatic carcinoma), MCF-7 (human breast carcinoma) and EC9706 (human esophageal carcinoma) cell lines. Among the screened compounds, 2i, 2n and 4f showed significant inhibitory activity against all the three human cell lines. (c) 2012 Elsevier Inc. All rights reserved.
Synthesis of novel D-ring fused 7′-aryl-androstano[17,16-d][1,2,4] triazolo[1,5-a]pyrimidines
作者:Li-Hua Huang、Yong-Fei Zheng、Chuan-Jun Song、Yan-Guang Wang、Zhi-Yu Xie、Yao-Wen Lai、Yong-Zheng Lu、Hong-Min Liu
DOI:10.1016/j.steroids.2011.12.012
日期:2012.4
The preparation of novel steroidal heterocycles containing the 7-aryl-substituted 1,2,4-triazolo [1,5-a]pyrimidine moiety fused to the 16,17-positions of the steroid nucleus is described. The Aldol reaction of 4-aza-androst-3,17-dione (la) and dehydroepiandrosterone (DHEA, 1b) with aromatic aldehydes was catalyzed by KF/Al2O3 to give the corresponding 3-oxo-4-aza-5 alpha- and 3 beta-hydroxy-5-en-16-arylidene-17-ketosteroids (2a-r). Subsequently, the intermediates 2a-r reacted with dinucleophilic 3-amino-1,2,4-triazole in presence of t-BuOK to afford the title compounds (3a-r). All the synthesized heterosteroids are new and are currently being evaluated for their biological activities. (C) 2011 Elsevier Inc. All rights reserved.