Fluorinatedβ-Diketones in Reactions with Diazocyclopropane Generated in situ
作者:Yury V. Tomilov、Ekaterina V. Guseva、Irina V. Kostuchenko、Bogdan I. Ugrak、Evgeny V. Shulishov、Oleg M. Nefedov
DOI:10.1002/ejoc.200400110
日期:2004.7
afforded the corresponding oxaspiropentanes 14−17 as products of the addition of diazocyclopropane (3) onto one of the carbonyl groups. In addition, the reaction proceeded selectively on the carbonyl groups adjacent to the di- or trifluoromethyl substituents. 1,1-Difluoroacetone reacted analogously with diazocyclopropane (3) generated in situ, giving stable 2-(difluoromethyl)-2-methyloxaspiropentane