meta-Photoaddition reactions of 2-chloro-, 2,5-dichloro-, and 2-halo-5-isopropyl-tropones with 9,10-dicyanoanthracene
作者:Akira Mori、Hiroki Yokoo、Toshihide Hatsui
DOI:10.1016/j.tet.2004.07.049
日期:2004.9
Photoreactions of 2-halotropones with the excited 9,10-dicyanoanthracene gave a meta-adduct and substitution products occurred at the C-2 position of troponoids. The mechanism of the meta-adduct was proved by the product analysis of the reaction of 3,7-dideuterio-2-bromo-5-isopropyltropone and 9,10-dicyanoanthracene. In the photoreaction of 2-chloro-5-isopropyltropone and 9,10-dicyanoanthracene in
2-卤代酮与激发的9,10-二氰基蒽发生光反应,生成间位加合物,取代产物出现在肌钙蛋白的C-2位置。通过3,7-二氘-2-溴-2-溴-5-异丙基丙酮与9,10-二氰基蒽的反应的产物分析证明了间加合物的机理。在苯和甲醇的混合溶剂中,2-氯-5-异丙基丙酮和9,10-二氰基蒽的光反应中,获得了带有二苯并-2-氧杂双环[3.2.2]壬烷体系的苯甲醛,以支持[它们之间的[8 + 4]环加成反应。