作者:Klaus Hannemann、Jakob Wirz、Andreas Riesen
DOI:10.1002/hlca.19880710802
日期:1988.12.14
Entirely different product distributions were observed when the bisdiazo compound 1 was irradiated by a conventional lamp (254 nm) on the one hand and by a pulsed excimer laser (248 nm) on the other. Continuous photolysis gave a complex reaction mixture (Scheme 2), of which eight products were identified. Pulsed laser photolysis gave (11E)-dibenzocyclooctatriene 20 as a new product in 49% yield (Scheme
当一方面用常规灯(254nm)和另一方面用脉冲准分子激光(248nm)照射双重氮化合物1时,观察到完全不同的产物分布。连续光解得到复杂的反应混合物(流程2),其中鉴定出八种产物。脉冲激光光解以49%的产率产生( 11 E)-二苯并环辛三烯20作为新产物(方案4)。我们假设化合物20是通过双卡宾中间体18形成的,这是由单个激光脉冲中的单个分子对两个光子的顺序吸收所导致的。