Pericyclic reactions of the enolate ions of 2,6,6-trimethylcyclohepta-2,4-dienone and 1,4,4-trimethylbicyclo[5.1.0]oct-5-en-2-one
作者:Anthony J. Bellamy、William Crilly、Jennifer Farthing、George M. Kellie
DOI:10.1039/p19740002417
日期:——
The rate at which the enolate ions of 2,6,6-trimethylcyclohepta-2,4-dienone (III), and 1,4,4-trimethylbicyclo-[5.1.0]oct-5-en-2-one (XII) undergo pericyclic reactions has been investigated by studying the n.m.r. spectra of the anions, and by methylation. In the case of (XII), Cope rearrangement of the enolate ion produces an isolable isomeric ketone. The thermal rearrangement of three 3-alkylcar-4-en-2-ones
2,6,6-三甲基环庚-2,4-二烯酮(III)和1,4,4-三甲基双环-[5.1.0] oct-5-en-2-one(XII)的烯醇离子的速率通过研究阴离子的nmr光谱并通过甲基化研究了经历了周环反应的)。在(XII)的情况下,烯酸酯离子的Cope重排产生可分离的异构酮。研究了三个3-烷基car-4-en-2-one的热重排。1,5,4-三甲基双环[5.1.0] oct-5-en-2-ol(XXII)及其2-甲基同系物(XXII)的脱水反应使用五氧化二磷-苯或多磷酸进行,但是立体有针对性的结构变化,分别产生二甲基和三甲基异丙基苯。