1,4-Addition of Benzene to a Dihydrocyclopent[<i>a</i>]indene Diradical: Synthesis and DFT Study
作者:Michael J. Marsella、Kunsang Yoon、Samia Estassi、Fook S. Tham、Dan B. Borchardt、Binh H. Bui、Peter R. Schreiner
DOI:10.1021/jo0485132
日期:2005.3.1
(ii) the observation of 1,4-addition of benzene (solvent). The reaction was further analyzed by a complete density functional theory (DFT) study, using an unrestricted approach (UBLYP) with a 6-31G* basis set for the open-shell triplet states of the reactants, products, and diradical intermediates to model the photochemical nature of observed transformation. A mechanism detailing the observed cyclization/addition
化合物1的光化学环化反应是带有两个乙炔基蒽发色团的均二烯(-CCC C CH 2 CC-),产生两个异构的二氢环戊基[ a]螺环稠合到9,10-二氢蒽部分的9位的]茚环系统。在以下基础上提出了光化学引发的双自由基环化途径的证据:(i)从与1,4-环己二烯(1,4-CHD)的反应中提取氢,以及(ii)观察到1,4-苯的加成(溶剂) )。通过完全密度泛函理论(DFT)研究对反应进行进一步分析,使用无限制方法(UBLYP),将6-31G *基础设置为反应物,产物和双自由基中间体的开壳三重态,从而对反应进行建模。观察到的转化的光化学性质。提出了详细说明所观察到的环化/加成反应的机理。