SYNTHESIS AND SPECTROSCOPIC INVESTIGATION OF SOME DIMERIC COUMARIN AND FURANOCOUMARIN MODELS

Authors
ELGAMAL MHA SHALABY NMM SHABAN MA DUDDECK H MIKHOVA B SIMON A TOTH G
Citation
Mha. Elgamal et al., SYNTHESIS AND SPECTROSCOPIC INVESTIGATION OF SOME DIMERIC COUMARIN AND FURANOCOUMARIN MODELS, Monatshefte fuer Chemie, 128(6-7), 1997, pp. 701-712
Citations number
19
Categorie Soggetti
Chemistry
Journal title
Monatshefte fuer Chemie → ACNP
ISSN journal
00269247
Volume
128
Issue
6-7
Year of publication
1997
Pages
701 - 712
Database
ISI
SICI code
0026-9247(1997)128:6-7<701:SASIOS>2.0.ZU;2-L
Abstract
The synthesis of some dimeric coumarin and furanocoumarin models and t heir structure elucidation by H-1 NMR, C-13 NMR, and mass spectroscopy is presented. In the presence of moisture some aldehydes are accompan ied by their hydrates. Methoxy signal doubling in the presence of a ch iral lanthanide shift reagent proves the dimeric nature of compound 8. In the mass spectra, heterolytic cleavage of the O-C linkage was noti ced which is a ran fragmentation in the case of aromatic ethers.