the presence of cycloalkanes (C5H10, C6H12, C7H14) are efficiently trapped by electrophilicalkenes (acrylonitrile, isopropylydenmalonitrile, isopropylydencyanoacetate) to give the corresponding alkylated aliphatic nitriles. The reaction can be carried out up to complete conversion of the alkene with reasonable (in most cases 60-65 %) yields. Addition of the radicals to the alkene is followed by electron
Hydrocarbon Activation. Synthesis of β-Cycloalkyl (Di)nitriles through Photosensitized Conjugate Radical Addition
作者:Anna Maria Cardarelli、Maurizio Fagnoni、Mariella Mella、Angelo Albini
DOI:10.1021/jo010400k
日期:2001.11.1
Photoinduced hydrogen abstraction from aliphatic cyclic hydrocarbons (C(5) to C(7), C(12), as well as adamantane) by triplet aromatic ketones in the presence of alpha,beta-unsaturated (di)nitriles offers a straightforward entry to the corresponding alkylated (di)nitriles via the alkyl radicals. Yields are moderate to good depending on the olefins structure (substitution in beta slows down the addition