Gold(I)-, Palladium(II)-, Platinum(II)-, and Mercury(II)-Catalysed Spirocyclization of 1,3-Enynediols: Reaction Scope
作者:Alexander Zhdanko、Martin E. Maier
DOI:10.1002/ejoc.201402029
日期:2014.6
spirocyclization of different 1,3-enynediols was investigated. The reaction was only efficient for the synthesis of [5,6]-spiroacetals. In this case, the reaction was characterized by almost quantitative yields, short reaction times, and low catalyst loadings (0.5–1 %). When the synthesis of [6,6]-spiroacetals was attempted, the reaction suffered from poor regioselectivity and a higher propensity of the