Heterosteroids remain interesting due to their potential biological activities. This prompted us to synthesize novel thiasteroids possessing the heteroatom in the A-ring. We set out to describe a new and versatile method for preparing 3-thia steroids from cholic acid via a selective oxidation of one hydroxyl group, a Baeyer-Villiger oxidation and a photolysis as the key steps. The characteristic (1)H
由于其潜在的生物活性,异类固醇仍然令人感兴趣。这促使我们合成在 A 环中具有杂原子的新型硫杂类固醇。我们着手描述一种新的通用方法,通过一个羟基的选择性氧化、Baeyer-Villiger 氧化和光解作为关键步骤,从胆酸制备 3-硫杂类固醇。报告了合成化合物的特征 (1) H 和 (13) C NMR 光谱特征。
Synthesis of heterosteroids. First synthesis of oxa steroid from cholic acid