Photophthalimidation of unactivated double bonds. Synthesis of protected phenethylamines
作者:Rafael Suau、Rafael García-Segura、Cristóbal Sánchez、Ana María Pedraza
DOI:10.1016/s0040-4039(99)00103-3
日期:1999.3
At low hydroxide ion concentrations, the photoaddition of phthalimide to cyclohexene, indene or styrene derivatives takes place. The cation radical obtained in the electron transfer from the alkene to excited phthalimide is trapped by phthalimide anion. At high hydroxide ion concentrations concerted [2+2] cycloaddition occurs that yields benzazepinediones, whatever the ionization potential of the alkene
在低氢氧根离子浓度下,邻苯二甲酰亚胺与环己烯,茚或苯乙烯衍生物发生光加成反应。电子从烯烃转移到激发的邻苯二甲酰亚胺中获得的阳离子自由基被邻苯二甲酰亚胺阴离子捕获。在高氢氧根离子浓度下,无论烯烃的电离势如何,都会发生一致的[2 + 2]环加成反应,生成苯并ze庚二酮。从观察到的邻苯二甲酰亚胺阴离子的荧光可以推断出最合适的反应条件。