10-secosteroids 5 and 6 with the Pb(OAc)4/I2 reagent. Complete and unambiguous 1H and 13C NMR resonance assignments of the obtained secosteroids, as well as the solution conformations of their 10- and 9-membered rings were determined by extensive analysis of 1D and 2D NMR spectral data. The structures and the solid-state conformations of 5,10-secosteroids 5–7 were confirmed by X-ray analysis. All diseco-compounds
在本文中,描述了一种合成途径,可以合成修饰的5,10:13,14-双片段化胆甾烷衍
生物8 – 14。合成过程涉及在胆甾烷分子中引入5α-和14α-羟基,随后用HgO /裂解5α,14α-dihydroxycholestan-3β-ylacetate(4)中的C(5)–C(10)键。I 2试剂和Pb(OAc)4 / I 2试剂中的立体异构体14α-羟基-5,10-secosteroid 5和6中的C(13)–C(14)键。完整无误的1 H和13通过对1D和2D NMR光谱数据进行大量分析,确定了所获得的类
固醇的C NMR共振分配及其10和9元环的溶液构象。的结构和5,10- secosteroids固态构象5 - 7是由X射线分析确认。所有迪斯科化合物均具有新颖的5,10:13,14-二
胆固醇胆甾烷骨架。