The sensitized photooxidation of 7-methoxycycloheptatriene (7-methoxytropilidene) afforded [4+2] cycloadduct (2), tropone, benzaldehyde and their 2-methoxy derivatives. Thermal isomerization of 2 followed by the treatment with alumina yielded 4-methoxytropone. The photooxidation of 1-methoxytropilidene gave 4-hydroxytropone and o-methoxybenzaldehyde, and the photooxidation of 3-methoxytropilidene followed
7-甲氧基
环庚三烯(7-甲氧基tropilidene)的敏化光氧化得到[4+2]环加合物(2)、托酮、
苯甲醛及其2-甲氧基衍
生物。2 的热异构化,然后用氧化铝处理产生 4-甲氧托酮。1-甲氧基托
吡烯光氧化生成
4-羟托酮和
邻甲氧基苯甲醛,3-甲氧基托
吡酮光氧化后用
三乙胺处理生成3-甲氧基托酮、托酮和
邻甲氧基苯甲醛。讨论了产物的表征和反应机理。