Photocycloaddition of Some Difluoro(aminoenonato)boron Complexes with Arylalkenes
作者:Kuniaki Itoh、Kazuhiko Okazaki、Yuan L. Chow
DOI:10.1002/hlca.200490027
日期:2004.2
The photocycloaddition of some difluoro[(methylamino-κN)alkenonato-κO]boron complexes 1 with arylalkenes 2 is discussed. The resulting [2+2] photoaddition gave the cyclobutane and azetidine derivatives (Schemes 1, 3, and 5). Rearrangements of the cyclobutane gave 1,5-diketones derivatives (Schemes 2, 4, and 5). The yields of the photoadducts were governed by the reduction and oxidation potentials.
讨论了一些二氟[(甲基氨基-κN)烯酮基-κO ]硼配合物1与芳基烯烃2的光环加成反应。所得的[2 + 2]光加成反应得到环丁烷和氮杂环丁烷衍生物(方案1、3和5)。环丁烷的重排生成1,5-二酮衍生物(方案2、4和5)。光加合物的产率受还原和氧化电位的控制。此外,产物的构型建立了高的区域选择性和立体选择性,表明存在单重态激基复合物。通过FMO(前沿分子轨道)计算使反应性和立体化学合理化。