Overcrowded molecules. Part IV. Thermal and photochemical electrocyclic reactions of trans-2-benzylidene-1-diphenylmethyleneindane and its 3-methyl derivative
作者:H. G. Heller、K. Salisbury
DOI:10.1039/j39700000399
日期:——
thermal distrotatory and a photochemical conrotatory ring closure followed by a suprafacial [1,5] hydrogen shift, to give cis- and trans-10,10a-dihydro-5,10-diphenyl-11H-benzo[b]fluorene, respectively. The 3-methyl derivative of the diene undergoes analogous rearrangement reactions but only one dihydrobenzofluorene is obtained in each of the thermal and photochemical reactions, indicating that steric
反式-2-苄叉-1-二苯基亚甲基茚满经历热分解和光化学旋转闭环反应,随后发生表面上的[1,5]氢转移,生成顺式和反式-10,10a-二氢-5,10-二苯基分别为11 H-苯并[ b ]芴。二烯的3-甲基衍生物经历类似的重排反应,但是在每个热和光化学反应中仅获得一个二氢苯并芴,这表明空间效应决定了发生两个可能的旋转或旋转过程中的哪一个。