The Friedel-Crafts Condensation of trans-2-Hydroxycyclohexaneacetic Acid Lactone with Aromatic Hydrocarbons. II. p-Xylene, Tetralin and α-Methylnaphthalene
The friedel-crafts condensation of the lactone of 4-methyl-2-hydroxycyclohexane acetic acid with aromatic hydrocarbons-I
作者:D.N. Chatterjee、S.P. Bhattacharjee
DOI:10.1016/s0040-4020(01)98145-1
日期:1971.1
The cationic nuclear alkylation of benzene with the lactone (I) has been found to give a stereoisomeric mixture containing 4-methyl-2-phenylcyclohexyl acetic acid (II) and 4-methyl-3-phenylcyclohexyl acetic acid (III). The former has been cyclized, reduced and dehydrogenated to 3-methyl phenanthrene. A similar condensation between the lactone (I) and toluene afforded a mixture of 4-methyl-2-o-tolyl-
已发现苯与内酯(I)的阳离子核烷基化得到含有4-甲基-2-苯基环己基乙酸(II)和4-甲基-3-苯基环己基乙酸(III)的立体异构混合物。前者已被环化,还原并脱氢为3-甲基菲。内酯(I)和甲苯之间的相似的缩合得到的4-甲基-2-混合物ø甲苯基- ,4-甲基-2- p甲苯基-和4-甲基-3- p -甲苯基-环己基乙酸。前两种酸的结构通过环化成酮氢菲(VIII)和(IX)以及随后分别转化成3,5-二甲基-菲和2,6-二甲基菲而得到确认。讨论了异常的Friedel-Crafts反应的可能机制。