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
在存在α,β-不饱和(di)腈的情况下通过三重芳族酮从脂肪族环状烃(C(5)到C(7),C(12)以及金刚烷)的光诱导氢提取提供了直接的途径经由烷基的相应的烷基化的(二)腈。取决于烯烃的结构,产率中等至良好(β取代会减慢单腈的加成,但对于α,α-二腈,电子活化也可使β,β-二取代底物有效烷基化)。用(1-甲基戊-4-烯叉)丙二腈获得了串联烷基化-环化方法。