Friedel–Crafts acylations of aromatic hydrocarbons. Part XIV. Monoacetylation and monobenzoylation of 2,7-dimethylnaphthalene
作者:P. H. Gore、A. S. Siddiquei
DOI:10.1039/p19720001442
日期:——
The Friedel–Crafts acetylation or benzoylation of 2,7-dimethylnaphthalene gives mixtures of three isomers, the 1-isomer usually predominating. In acetylations in nitro-solvents equal amounts of the 1- and the 3-(β) isomers are formed. Competitive acetylation experiments in chloroform solution give the following positional reactivities of naphthalene and derivatives: 1- 1·00, 2- 0·31, 2,7-dimethyl-1-
2,7-二甲基萘的Friedel-Crafts乙酰化或苯甲酰化反应可得到三种异构体的混合物,其中1种异构体通常占主导地位。在硝基溶剂中进行乙酰化时,会形成等量的1-和3-(β)异构体。在氯仿溶液中进行竞争性乙酰化实验,可得出萘及其衍生物的以下位置反应性:1-1.00、2-0.31、2,7-二甲基-1-39、3,6-二甲基-2-6·0, 3,6-二甲基-1- 3·5; 相应的苯甲酰化的值分别为1·00、0·40、230、9·7和7·5。