Die säurekatalysierte Isomerisierung von 7-Oxabicyclo[2.2.1]-heptadien- und Oxepin-Derivaten [1]
作者:P. Vogel、B. Willhalm、H. Prinzbach
DOI:10.1002/hlca.19690520305
日期:——
The acid catalyzed isomerization of several substituted oxanorbornadienes 4 and oxepines 10 - easily available from 4 by a photochemical and a consecutive thermal step - allows the synthesis of several highly substituted phenols and 2,4-cyclohexadienones in a straightforward manner and with good to excellent yields. The formation of the methoxycarbonyl-hexadienes 18e and 18f upon photolysis of 9e and
几种取代的氧杂降冰片二烯4和oxepines 10的酸催化异构化(可通过光化学法和连续的热步骤从4轻松获得)允许以直接的方式合成数个高度取代的苯酚和2,4-环己二酮,并具有良好或优异的收率。9e和17f在甲醇中光解后形成的甲氧羰基-己二烯18e和18f有助于结构阐明。讨论了McLAFFERTY和EMERY效应在甲氧基羰基和甲基取代酚的质谱降解中的相对重要性。