Novel Synthesis of Highly Functionalized 14-β-Hydroxysteroids Related to Batrachotoxin and Ouabain
作者:Stéphane Trudeau、Pierre Deslongchamps
DOI:10.1021/jo0355606
日期:2004.2.1
The use of anionic polycyclization was investigated in an effort to develop a versatile and convergent synthesis of advanced tetracyclic intermediates of batrachotoxin and ouabain analogues. Two new 5-(trialkylsilyl)-2-cyclohexenones as A ring precursors and a new Nazarov intermediate (D ring precursor) were prepared for this purpose. The reaction of the unsaturated β-keto aldehyde A ring precursor
研究了阴离子多环化的用途,目的是开发一种多功能和收敛的合成的梭状芽孢杆菌毒素和哇巴因类似物的高级四环中间体。为此,制备了两种新的作为A环前体的5-(三烷基甲硅烷基)-2-环己烯酮和一种新的Nazarov中间体(D环前体)。在随后的转化之后,不饱和β-酮醛A环前体与Nazarov中间体的烯醇盐的反应提供了完全控制立体化学的14-β-羟基类固醇。