Tetrahedron Letters p. 5685 - 5688 (1984)
Update date:2022-08-04
Topics:
Takahashi, Kazuko
Ohnishi, Keiichi
Takase, Kahei
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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(1988)Doi:10.1002/anie.200702256
(2007)Doi:10.1039/c7dt00058h
(2017)Doi:10.1021/ja973760r
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(1963)
