作者:Sang Chul Shim、Eun Ju Shin
DOI:10.1246/cl.1987.45
日期:1987.1.5
Photolysis of 5(E)-styryl-1,3-dimethyluracil(5(E)-SDU) with some olefins, such as tetramethylethylene, methyl crotonate, dimethyl ethylidenemalonate, and dimethyl maleate in dichloromethane yields [2+2] cycloadducts along with E\ightleftarrowsZ photoisomerization and photocyclization products of 5-SDU. The [2+2] cycloaddition reaction with olefins occurs on the 5,6-double bond of uracil ring rather
5(E)-苯乙烯基-1,3-二甲基尿嘧啶 (5(E)-SDU) 与一些烯烃(如四甲基乙烯、巴豆酸甲酯、亚乙基丙二酸二甲酯和马来酸二甲酯)在二氯甲烷中的光解产生 [2+2] 环加合物以及E\ightleftarrowsZ 5-SDU 的光异构化和光环化产物。与烯烃的 [2+2] 环加成反应发生在尿嘧啶环的 5,6-双键上,而不是预期的中心双键上。