SYNTHESIS AND PROPERTIES OF DIMETHANO-BRIDGED TETRADEHYDRO[21]-ANNULENONES, TETRADEHYDRO-[23]-ANNULENONES AND TETRADEHYDRO-[25]ANNULENONES

Authors
OJIMA J HIRAIWA N KONDO S ASANO K SAKON C HIGUCHI H INOUE K YAMAMOTO G
Citation
J. Ojima et al., SYNTHESIS AND PROPERTIES OF DIMETHANO-BRIDGED TETRADEHYDRO[21]-ANNULENONES, TETRADEHYDRO-[23]-ANNULENONES AND TETRADEHYDRO-[25]ANNULENONES, Journal of the Chemical Society. Perkin transactions. I, (23), 1995, pp. 3027-3036
Citations number
18
Categorie Soggetti
Chemistry Inorganic & Nuclear
Journal title
Journal of the Chemical Society. Perkin transactions. I → ACNP
ISSN journal
0300922X
Issue
23
Year of publication
1995
Pages
3027 - 3036
Database
ISI
SICI code
0300-922X(1995):23<3027:SAPODT>2.0.ZU;2-G
Abstract
Syntheses of tetradehydro-1,6:11,16-dimethano[21]annulen-19-one 11, ro -18-methyl-1,6:11,16-dimethano[21]annulen-19-one 12, tetradehydro-1,6: 11,16-dimethano[23]annulen-19-one 13 and tetradehydro-1,6:11,16-dimeth ano[25]annulen-21-one 14 are described. The influence of an introducti on of two methane-bridges upon the structure and tropicity of the tetr adehydro[21]-, -[23]- and -[25]annulenone ring systems is discussed in view of the H-1 NMR and electronic spectra of these annulenones as we ll as those of the corresponding monocyclic annulenones.