Palladium-catalysed coupling of vinyl triflates with enynes and its application to the synthesis of 1α,25-dihydroxyvitamin D3
作者:José L. Mascareñas、Luis A. Sarandeses、Luis Castedo、Antonio Mouriño
DOI:10.1016/s0040-4020(01)86410-3
日期:1991.1
We describe a general approach, based on the palladium-catalysed coupling of enynes with vinyl triflates, for the construction of dienynes related to vitamin D metabolites and analogues. As an application of this method, an efficient convergent synthesis of 1α,25-dihydroxyvitamin D3 starting from the Inhoffen-Lythgoe diol (6a) and natural carvones has been carried out (11 steps, 28% overall yield from
我们描述了一种基于钯催化的三烯与乙烯基三氟甲磺酸的炔烃偶联反应的一般方法,该方法用于构建与维生素D代谢物和类似物有关的二烯。作为该方法的一种应用,已经从Inhoffen-Lythgoe二醇(6a)和天然烯酮开始,有效地收敛合成了1α,25-二羟基维生素D 3(11个步骤,从6a总产率为28%)。这种策略允许在合成的最后步骤中标记侧链