Synthetic Photochemistry. XLV. Photoconversion of 2-Methylenehomobarrelenes to 9-Methylenebarbaralanes
作者:Guan Rong Tian、Shigeru Sugiyama、Akira Mori、Hitoshi Takeshita
DOI:10.1246/bcsj.61.4397
日期:1988.12
The photolysis of 4-methoxycarbonyl-2-oxatricyclo[6.2.2.01,5]dodeca-4,6,9,11-tetraen-3-one derivatives yielded 9-methylenebarbaralanes along with 5-methylenetricyclo[4.3.0.02,9]nonadiene and 1-methyleneindan derivatives. From the benzophenone-sensitization experiments, 9-methylenebarbaralane and 5-methylenetricyclo[4.3.0.02,9]nonadiene were formed via a triplet excited state, but 1-methyleneindan was formed via a singlet excited state.
光解 4-甲氧羰基-2-氧杂三环[6.2.2.01,5]十二碳-4,6,9,11-四烯-3-酮衍生物可得到 9-亚甲基巴巴拉兰以及 5-亚甲基三环[4.3.0.02,9]壬二烯和 1-亚甲基茚衍生物。在二苯甲酮敏化实验中,9-亚甲基巴巴拉兰和 5-亚甲基三环[4.3.0.02,9]壬二烯是通过三重激发态形成的,而 1-亚甲基茚丹则是通过单重激发态形成的。