[5+1] Cocyclization of (Cyclopropylmethylene)cyclopropanes and other Vinylcyclopropanes with Carbon Monoxide Catalyzed by Octacarbonyldicobalt
作者:Armin de Meijere、Takuya Kurahashi
DOI:10.1055/s-2005-917102
日期:——
Vinylcyclopropanes react with octacarbonyldicobalt stoichiometrically under mild conditions to give cyclohex-3-enones in moderate to good yields (51-75%). Catalytic amounts of the cobaltcarbonyl complex or a rhodiumcarbonyl complex also mediate [5+1] cocyclizations of vinylcyclopropanes with carbon monoxide (under CO balloon pressure) to give cyclohex-3-enones in good yields (up to 95%).
在温和的条件下,乙烯基环丙烷与八羰基二钴按比例发生反应,生成中到高产率(51-75%)的环己-3-烯酮。催化量的羰基钴络合物或羰基铑络合物还能介导乙烯基环丙烷与一氧化碳(在一氧化碳气球压力下)发生 [5+1] 环化反应,从而以良好的收率(高达 95%)生成环己-3-烯酮。