作者:Akira Tsuchida、Masahide Yamamoto、Yasunori Nishijima
DOI:10.1246/bcsj.60.2899
日期:1987.8
The photocycloaddition reaction of N-vinylcarbazole (VCZ) as an electron donor, with 3-cyanostyrene as an electron acceptor, was studied. In nonpolar solvents, two cyclobutanes of cis-1-(9-carbazolyl)-2-(3-cyanophenyl)cyclobutane and trans-1-(9-carbazolyl)-2-(3-cyanophenyl)cyclobutane (in a ratio of 3 : 1) were obtained from an exciplex intermediate. The structure of cis cyclobutane seemed to originate
研究了N-乙烯基咔唑(VCZ)作为电子供体,3-氰基苯乙烯作为电子受体的光环加成反应。在非极性溶剂中,顺式-1-(9-咔唑基)-2-(3-氰基苯基)环丁烷和反式-1-(9-咔唑基)-2-(3-氰基苯基)环丁烷的两种环丁烷(比例为3 : 1) 从 exciplex 中间体获得。顺式环丁烷的结构似乎源于激复合物的夹心构象。在极性溶剂中,观察到与自由基的光解作用,并且通过链式机制通过 VCZ 的阳离子自由基有效地生产了反式-1,2-二(9-咔唑基)环丁烷。瞬态中间体通过纳秒激光光解测量;结果支持反应方案。