Tetracyclo[3.2.0.02,7.04,6]hept-1-ene: formation and trapping of 1,2-dehydroquadricyclane. Ab initio calculations on dehydroquadricyclanes
作者:Joachim Podlech、Kurt Polborn、Guenter Szeimies
DOI:10.1021/jo00067a053
日期:1993.7
Hydrogen chloride elimination from chloroquadicyclane 14 with tert-butyllithium or n-butyllithium/potassium tert-butoxide in ether at 0-degrees-C led to the title compound 4 as a reactive intermediate. Generating 4 with LDA in the presence of diphenylisobenzofuran (8) or trimethylisoindole (9) afforded the Diels-Alder adducts 18a and 19a. Ab initio calculations at the TCSCF/6-31G* level have been performed on the dehydroquadricyclanes 2-7, and total energies and olefinic strain energies have been determined for those molecules.
BAUMGAERTEL, O.;SZEIMIES, G., CHEM. BER., 1983, 116, N 6, 2180-2204