A Novel [2 + 2] Photodimerization of <i>N</i>-[(<i>E</i>)-3,4-Methylenedioxycinnamoyl]dopamine in the Solid State
作者:Yoshikatsu Ito、Souta Horie、Yasuhiro Shindo
DOI:10.1021/ol0162419
日期:2001.7.1
[reaction: see text] To give photoreactivity to catecholamines, N-cinnamoyl-substituted dopamines (E)-5a-5c and O,O'-dimethyldopamines (E)-3a-3c were prepared under solvent-free conditions. A particularly interesting observed photoreactivity was that of N-[(E)-3,4-methylenedioxycinnamoyl]dopamine ((E)-5c), which underwent a novel type of [2 + 2] photodimerization in the solid state, giving exclusively
[反应:见正文]为了使儿茶酚胺具有光反应性,在无溶剂条件下制备了N-肉桂酰基取代的多巴胺(E)-5a-5c和O,O'-二甲基多巴胺(E)-3a-3c。观察到的一个特别有趣的光反应性是N-[(E)-3,4-亚甲基二氧基肉桂酰基]多巴胺((E)-5c)的固态反应,它经历了新型的[2 + 2]光二聚化反应,仅产生一种三环产物8。该反应是烯烃固态光加成到苯环的第一个例子。