Nickel(0)-catalysed novel co-oligomerization of ethoxy(trimethylsilyl)ethyne with carbon dioxide to 4,6-diethoxy-3-[1-ethoxy-2,2-bis(trimethylsilyl)vinyl]-5(trimethylsilyl)-2-pyrone

Abstract

A nickel(0) catalyst, which was generated from bis(cyclo-octadiene)nickel and bis(diphenylphosphino)butane, effected a novel co-oligomerization of three molecules of ethoxy(trimethylsilyl)ethyne with one molecule of carbon dioxide to afford the title compound (2) in an excellent yield.