A process for preparing vitamins of the vitamin K.sub.1 and K.sub.2 series in their E-isomeric form through the reaction of a phenylcarbene metal complex with an enyne and intermediates in this synthesis.
一种制备
维生素K.sub.1和K.sub.2系列的E异构体的方法,通过苯基卡宾
金属配合物与烯烃的反应以及在该合成中的中间体。