作者:Ken S. Rehder、William Reusch
DOI:10.1016/s0040-4020(01)88279-x
日期:1991.9
from the corresponding cyclobutanone (3). An oxy-Cope rearrangement of 1b was not observed under any conditions. Both epimers gave the same thermolysis products, a fused cyclohexanone derivative 15 (a formal [1,3] shift product) and vinyl ketone 16 (a retro-ene product). At temperatures above 250 °C some acenaphthylene was also obtained. The anionic oxy-Cope variant gave only 15. A common diradical intermediate
在回流的二甲苯中和在二甲苯中,研究了7-乙烯基-6b,8,8a-四氢环丁[a] ol萘-7-ol(1a和1b)的外(远端)和内(近端)异构体的热解反应。填充热解柱。这些差向异构体由相应的环丁酮(3)制备。在任何条件下均未观察到oxy-Cope重排1b。两种差向异构体都给出相同的热解产物,即稠合的环己酮衍生物15(一种正式的[1,3]转变产物)和乙烯基酮16(一种逆烯产物)。在高于250℃的温度下,也获得了一些。阴离子oxy-Cope变体仅产生15。提出了一种用于热反应的常见的双自由基中间体。