The 1H and 13C NMR resonances of 19 tetracyclic acridinone derivatives were completely and unambiguously assigned by a combination of 1H-detected one-bond HMQC and long-range (two and three bonds) HMBC correlation experiments. 1H and 13C chemical shifts are also reported for the respective N -aryl b
1H and 13C NMR chemical shifts of some thienyl-substituted chromenes
β Scribed by C. Moustrou; N. Rebiere; M. Frigoli; E. Pottier; R. Guglielmetti; R. Faure
- Publisher
- John Wiley and Sons
- Year
- 1998
- Tongue
- English
- Weight
- 172 KB
- Volume
- 36
- Category
- Article
- ISSN
- 0749-1581
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β¦ Synopsis
The complete assignment of the 1H and 13C NMR spectra of eight thienyl-substituted chromenes was achieved by the concerted application of homonuclear (gs-COSY), 1H-detected heteronuclear one-bond (gs-HMQC) and long-range (gs-HMBC) gradientselected correlation experiments.
π SIMILAR VOLUMES
The 1H and 13C NMR resonances of four 3H-naphtho[2,1-b]pyrans were completely and unambiguously assigned by a combination of homonuclear (gs-COSY), 1H-detected heteronuclear one-bond (gs-HMQC) and long-range (gs-HMBC) gradient-selected correlation experiments.
## Reference Data and chemical shifts of some tetracyclic and 1H 13C pentacyclic acridinone derivatives
H and 13C NMR chemical shifts and the homo-and heteronuclear coupling constants of 14 nitroxanthones are presented. Specific nitro increments for xanthones depending on substituent position and on the respective ring carbon position and shift additivity rules were developed by means of multiple line