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.
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喹啉酮2,并证明了三元环比
二苯基环丙烯酮具有更大的亲核性,并且七元环存在于具有高苯结构的
环庚三烯(非降
二十碳烯)互变异构体中。围绕环间键2的旋转势垒为13.3 Kcal / mol。