Friedel–Crafts ipso-alkylation at the ortho-alkyl group of the N-arylamino moiety of 1-allyl-1-N-arylaminocycloalkanes to give alkyl substituted dihydrospiro[(1H) quinoline-2,1′-cycloalkanes] is reported. Unexpected results were explained in the context of intramolecular ipso-substitution of alkyl groups and their 1,2-rearrangement. A plausible mechanism for this type of Friedel–Crafts alkylation by an alkene moiety
前所未有的分子内弗里德尔-克拉夫茨本位处烷基化的邻位的的烷基基团Ñ 1-烯丙基-1- -arylamino部分Ñ -arylaminocycloalkanes,得到烷基取代的二氢螺[(1 ħ)
喹啉-2,1- ' -环
烷烃]被报道。在分子内ipso取代烷基及其1,2-重排的背景下解释了意想不到的结果。提出了一种通过布朗斯台德酸(H 2 SO 4)促进的烯烃部分进行的弗里德-克拉夫茨烷基化的合理机制。