作者:P.J. Kropp
DOI:10.1016/s0040-4020(01)98355-3
日期:1965.1
concerning its intermediacy in the previously reported rearrangement of the dienone (I) to the linearly conjugated isomer (IX). The spiro dienone (VIII) was prepared by solvolysis of the tosylate (XVI). On irradiation in methanol or dioxane it was converted principally to the cyclopropyl ketone (IV), which, in turn, underwent further rearrangement to the dienone (IX). No evidence for the formation of
为了在先前报道的二烯酮(I)重排成线性共轭异构体(IX)的过程中获得有关其中间体的证据,已经研究了螺二烯酮(VIII)在中性介质中的光化学行为。螺二烯酮(VIII)是通过甲苯磺酸酯(XVI)的溶剂化制备的。在甲醇或二恶烷中照射后,它主要转化为环丙基酮(IV),然后进一步重排为二烯酮(IX)。未检测到形成异构体环丙基酮(XI)的证据。建议光产物(IV)的选择性形成归因于IV的β-甲基取代的烯酮体系相对于α-甲基异构体(XI)的稳定性增强。