Acta Crystallographica, Section C: Crystal Structure Communications p. 1090 - 1093 (1994)
Update date:2022-07-30
Topics:
Hua, Duy H.
Dantoing, Benoit
Robinson, Paul D.
Tran-Cong, Qui
Meyers, Cal Y.
The initially formed cyclophane product, tetraethyl 6,8,15,17-tetrahydro-7H,16H-5,18<1',2'>-benzeno-9,14-ethenodibenzocyclotetradecene-7,7,16,16-tetracarboxylate (I), produced from the cyclization of 9,10-bis<<2,2-di(ethoxycarbonyl)>ethyl>anthracene by treatment with sodium hydride followed by 1,4-bis(bromomethyl)naphthalene, was completely isomerized into its intramolecular <4?s + 4?s> cycloaddition product, tetraethyl 2,3,3a,7b,9,10,10a,14b-hexahydro-1H,8H-3a,7b<1',2'>-benzeno-10a,14b-ethenodibenzodicyclopenta
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