Novel series of 17β-pyrazolylandrosta-5,16-diene derivatives and their inhibitory effect on 17α-hydroxylase/C17,20-lyase
作者:Zoltán Iványi、Nikoletta Szabó、János Wölfling、Mihály Szécsi、János Julesz、Gyula Schneider
DOI:10.1016/j.steroids.2012.07.001
日期:2012.9
The Claisen condensation of 3beta-acetoxypregna-5,16-dien-20-one (1) with ethyl formate in the presence of sodium methylate in pyridine is known to lead to 3beta-hydroxy-21-hydroxymethylidenepregna-5,16-dien-20-one (2) in good yield. With the methods described for the preparation of the saturated D-ring pyrazolyl series, the reactions of 2 with phenylhydrazine and its p-substituted derivatives in acetic
已知在吡啶中存在甲醇钠的情况下,3beta-乙酰氧基pregna-5,16-dien-20-(1)与甲酸乙酯的Claisen缩合反应会生成3beta-羟基-21-羟甲基亚甲基戊烯-5,16-dien- 20一(2)的高产。用所描述的制备饱和D环吡唑基系列的方法,2与苯肼及其对位取代衍生物在乙酸中的反应生成两种甾体区域异构体的混合物,即1'-芳基-3'-吡唑基- (4a-e)和1'-芳基-5'-吡唑基(5a-e)类固醇。化合物4a-e在文献中是未知的。体外测试了产生的芳基吡唑对17α-羟化酶/ C(17,20)-裂合酶(P450(17α))的作用,两种区域异构体均未发挥有效的抑制作用。