Cyclopropanation with Gold(I) Carbenes by Retro-Buchner Reaction from Cycloheptatrienes

Cationic gold(I) promotes the retro-Buchner reaction of 7-substituted 1,3,5-cycloheptatrienes, leading to gold(I) carbenes that cyclopropanate alkenes.阳离子一价金（cationic gold(I)）可催化7-取代-1,3,5-环庚三烯发生逆布赫纳反应（retro-Buchner reaction），生成一价金卡宾（gold(I) carbenes），此类卡宾可对烯烃进行环丙烷化反应。