Cyclotrimerization of Benzobarrelene: Synthesis of New Isomeric Barrelene Architectures
作者:Arif Daştan、Fabrizio Fabris、Ottorino De Lucchi、Murat Güney、Metin Balcı
DOI:10.1002/hlca.200390285
日期:2003.10
The cyclotrimerization reaction of benzobarrelene derivatives was investigated. Dibromobenzobarrelene 10 was converted to the bromostannyl derivative 11, which was used as the substrate of the cyclotrimerization reaction. Thus, reaction of 11, with copper(I) thiophene-2-carboxylate (CuTC) gave a mixture of the isomeric cyclotrimers 5 and 6 and the dimers 12 and 13, in addition to a trace of protodestannylated
Synthesis of 2,3-, 2,5-, and 2,6-disubstituted-benzobarrelenes high temperature bromination II
作者:Metin Balci、Osman Çakmak、Tuncer Hokelek
DOI:10.1016/s0040-4020(01)92257-4
日期:1992.4
Bromination of 2-bromo-1,4-dihydro-1,4-ethenonaphthalene (7) at -0 0C has been found to give five rearranged tribromides 8, 9, 10, 11, and 12 via Wagner-Meerwein rearrangement with accompanying aryl and alkyl migration. It has been shown that the endo tribromides 9and 11 are secondary products formed by bromine-catalyzed reaction of the corresponding exo tribromides. The bromination of 7 at 78 °C resulted
Naphthalene and anthracene nuclei are present in several natural and synthetic compounds. Due to their unique physical and chemical properties, access to functionalized naphthalenes and anthracenes has attracted the attention of both synthetic and medicinal chemists over the decades. In this study, successive Diels–Alder/retro-Diels–Alder reactions of dimethyl 1,2,4,5-tetrazine-3,6-dicarboxylate with