SYNTHESIS AND PROPERTIES OF 5-(2,3-DIPHENYLCYCLOPROPENYLIDENE)-1,6-METHANO-2(5H)--ANNULENONE (OR 10,11-DIPHENYL-4,9-METHANOQUINAREN-3-ONE). CONTRIBUTION OF HOMOBENZENE STRUCTURE ANNELATED ON QUINAREN-3-ONE

DOI: 10.1016/S0040-4039(01)91412-1

Source and publish data:

Tetrahedron Letters p. 5685 - 5688 (1984)

Update date:2022-08-04

Topics:

Authors:

Takahashi, Kazuko

Ohnishi, Keiichi

Takase, Kahei

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Article abstract of DOI:10.1016/S0040-4039(01)91412-1

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.

Full text of DOI:10.1016/S0040-4039(01)91412-1

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