Thermally Induced Cycloadditions of Donor/Acceptor Carbenes
作者:Stephanie R. Ovalles、Jørn H. Hansen、Huw M. L. Davies
DOI:10.1021/ol201628d
日期:2011.8.19
The thermal decomposition of aryldiazoacetates and aryldiazoketones in the absence of a catalyst leads to synthetically useful transformations. The thermal reaction of aryldiazoacetates with alkenes generates cyclopropanes in 68-97% yield and with good diastereoselectivity (up to 19:1 dr) when the aryl substituent is electron-rich. The thermal reaction of aryldiazoketones with alkenes generated cyclobutanones in 71-94% yield and with good diastereocontrol (>= 9:1 dr).