(E)-Bis-1,2-(tributylstannyl)ethylene as a staple in a synthetic approach to taxol
作者:Francette Delaloge、Joëlle Prunet、Ange Pancrazi、Jean-Yves Lallemand
DOI:10.1016/s0040-4039(96)02306-4
日期:1997.1
An approach of taxol synthesis based on the use of (E)-bis-1,2-(tributylstannyl)ethylene 6 as a readily available two-carbon 1,2-link between A and C-ring is described. The conjugate addition of a mixed higher-order stannylvinyl cyanocuprate derived from 6 on chiral cyclohexenone 5 is completely stereoselective. A model study on 3-methylcyclohex-2-enone showed that the afforded stannylvinyl cyclohexenone
描述了一种基于紫杉醇合成的方法,该方法基于使用(E)-双-1,2-(三丁基锡烷基)乙烯6作为A和C环之间容易获得的二碳1,2-键。在手性环己烯酮5上共轭添加6衍生的混合的更高阶的苯乙烯基乙烯基氰基戊酸酯,是完全立体选择性的。对于3-甲基环己-2-烯酮的模型的研究表明,得到stannylvinyl环己烯酮12可以不经进一步变换中与乙烯基三氟甲磺酸酯的Stille交叉偶联反应啮合4对应于紫杉醇,得到A-环开环-taxane 14。