The effect of the alkoxy group and the structure of the cycloalkene on 2 + 2 photocycloaddition to alkoxy substitutedpentafluorobenzene
作者:Boris Šket、Marko Zupan
DOI:10.1016/s0040-4020(01)89144-4
日期:1989.1
pentafluorobenzene with cycloalkenes in cyclohexane solution resulted in regioselective 2+2 cycloaddition to the 3,4 position of the arene. The stereochemistry of the products formed depended on the structure of the cycloalkene: only an anti 2+2 adduct was observed with cyclopentene, a syn 2+2 adduct with norbornene, while both syn and anti 2+2 cycloaddition took place with cycloheptene and cyclooctene. The magnitude