SYNTHESIS AND PROPERTIES OF A BISMETHANO-BRIDGED BISDEHYDRO[21]ANNULENONE - CONFORMATION IN SOLUTION AND IN THE CRYSTALLINE STATE

Authors
HIGUCHI H KIYOTO S SAKON C HIRAIWA N ASANO K OJIMA J INOUE K YAMAMOTO G
Citation
H. Higuchi et al., SYNTHESIS AND PROPERTIES OF A BISMETHANO-BRIDGED BISDEHYDRO[21]ANNULENONE - CONFORMATION IN SOLUTION AND IN THE CRYSTALLINE STATE, Chemistry Letters, (12), 1994, pp. 2291-2294
Citations number
6
Categorie Soggetti
Chemistry
Journal title
Chemistry Letters → ACNP
ISSN journal
03667022
Issue
12
Year of publication
1994
Pages
2291 - 2294
Database
ISI
SICI code
0366-7022(1994):12<2291:SAPOAB>2.0.ZU;2-7
Abstract
A bismethano-bridged bisdehydro[21]annulenone, osa-6,8,10,12,15,17,19, 21-octaene-2,4-diyn-14-one, was synthesized. X-ray crystallograpby rev eals the syn orientation of the two methane bridges. Two conformers ar e present in solution in a 97:3 ratio, the major isomer being the one existing in the crystalline state. Paratropicity of this compound in C DCl3 and in CF3CO2D is discussed.