New steroidal heterocycles: the synthesis and structure of androsteno[2,3-g]-, androstano[3,2-f]-, and androsteno[16,17-g]-pyrazolo[1,5-a]pyrimidines
作者:Joginder S. Bajwa、Peter J. Sykes
DOI:10.1039/p19800000481
日期:——
fused and linearly fused products, androst-2-eno[2,3-g]- and androstano[3,2-f]-pyrazolo[1,5-a]pyrimidines, respectively. However, the condensation of 3-amino-4-cyano-5-cyanomethylpyrazole with 2-hydroxymethyl-3-oxo-steroids gave only angularly fused products, namely, androst-2-eno[2,3-g]pyrazolo[1,5-a]pyrimidines. The reaction of 3-aminopyrazole and its derivatives with a 2-hydroxymethylene-Δ4-3-oxosteroid
3-氨基吡唑及其4-氰基衍生物与2-羟基亚甲基-3-氧代甾族化合物的反应,得到了角熔合和线性熔合产物的混合物,其中rost-2-eno [2,3- g ]-和androstano [ 3,2- f ]-吡唑并[1,5- a ]嘧啶。然而,3-氨基-4-氰基-5-氰基甲基吡唑与2-羟甲基-3-氧代甾族化合物的缩合仅产生有角度的熔融产物,即,rost-2-eno [2,3- g ] pyrazolo [1, 5- α ]嘧啶。3-氨基吡唑和反应及其与2-羟基亚甲基-Δ衍生物4 -3- oxosteroid和16羟基亚甲基-17-氧代-甾族化合物也得到只有角度熔融产物,雄甾-2,4-二烯并[2,3 -克]-和androst-16-eno [16,17- g ]-吡唑并[1,5- a ]嘧啶。所有这些化合物的结构都是通过ir,uv,1 H和13 C nmr光谱确定的。