Synthesis and properties of 5-(2,3-diphenylcyclopropenylidene)-1,6-methano-2(5h)-[10]- annulenone (or 10,11-diphenyl-4,9-methano[3.10]quinaren-3-one). Contribution of a homobenzene structure annelated on [3.6]quinaren-3-one
作者:Kazuko Takahashi、Keiichi Ohnishi、Kahei Takase
DOI:10.1016/s0040-4039(01)91412-1
日期:1984.1
The title quinarenone 2 has been prepared and proved that the three-membered ring possesses a larger diatropicity than diphenylcyclopropenone and the seven-membered ring exists in a cycloheptatriene (not norcaradiene) tautomer having a contribution of a homobenzene structure. The rotational barrier about the intercyclic bond of 2 is 13.3 Kcal/mol.