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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

✍ Scribed by Kazuko Takahashi; Keiichi Ohnishi; Kahei Takase

Publisher: Elsevier Science
Year: 1984
Tongue: French
Weight: 306 KB
Volume: 25
Category: Article
ISSN: 0040-4039
DOI: 10.1016/s0040-4039(01)91412-1

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✦ Synopsis

The titZe quinarenone 2 has been prepared and proved that the three-membered ring possesses a larger diatropicity than diphenyZcycZopropenone and the seven-membered ring exists in a cycloheptatriene (not norcaradienel tautomer having a contribution of a homobenzene structure. The rotational barrier about the intercyclic bond of 2 is 13.3 KcaZ/mol.

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