%0 Journal Article %T Isolation and Characterization of Silyl Enol Ether Intermediates in the Synthesis of 5,6,9,10¨CTetrahydro-7,8-benzocyclooctenedione %A Saeed Abolghassemi Fakhri %A Adeleh Moshtaghi Zenouz %J Molecules %D 2002 %I MDPI AG %R 10.3390/71100801 %X The 5,6,9,10-tetrahydro-7,8-benzocyclooctenedione 4 has been synthesized through fragmentation of a bicyclo[4.2.0]octane system using an acyloin reaction on the trans-2,3-dicarboethoxy-1,2,3,4-tetrahydronaphthalene 1 in the presence of trimethylchlorosilane (TMCS). The two intermediates of this reaction, bis(trimethylsiloxy) derivatives 2 and 3, have been isolated and characterized. %K 7 %K 8-benzocyclooctenedione %K acyloin reaction %K conrotatory electrocyclic ring opening %K fragmentation of bicyclo[ 4.2.0 ]octane systems %K eight-membered rings %U http://www.mdpi.com/1420-3049/7/11/801