Carbon-13 nuclear magnetic resonance spectra of 2H-1-benzopyran-2-ones (coumarins) in chloroform and sulfuric acid

1975 ◽  
Vol 40 (8) ◽  
pp. 1175-1178 ◽  
Author(s):  
Stanley A. Sojka
Keyword(s):  
Nuclear Magnetic Resonance ◽  
Sulfuric Acid ◽  
Magnetic Resonance ◽  
Nuclear Magnetic Resonance Spectra ◽  
Magnetic Resonance Spectra ◽  
Nuclear Magnetic

1,4-DIMETHYLBICYCLO[2.2.1]HEPTANE DERIVATIVES

1965 ◽  
Vol 43 (8) ◽  
pp. 2306-2311
Author(s):  
Peter Yates ◽  
Thomas R. Lynch
Keyword(s):  
Nuclear Magnetic Resonance ◽  
Acetic Acid ◽  
Sulfuric Acid ◽  
Magnetic Resonance ◽  
Methylmagnesium Iodide ◽  
Nuclear Magnetic Resonance Spectra ◽  
Magnetic Resonance Spectra ◽  
Nuclear Magnetic

The product from the action of methylmagnesium iodide on bicyclo[2.2.1]heptane-2,5-dione gave 2-exo-5-endo-diacetoxy-1,4-dimethylbicyclo[2.2.1]heptane on treatment with sulfuric acid in acetic acid. This has been converted to 1,4-dimethylbicyclo[2.2.1]heptane-2-exo-5-endo-diol, to 1,4-dimethylbicyclo[2.2.1]heptane-2,5-dione, and to 1,4-dimethylbicyclo[2.2.1]heptane-2-endo-5-endo-diol. The stereochemical assignments have been made on the basis of the interpretation of the nuclear magnetic resonance spectra of these compounds. The exo–endo diacetoxy compound is shown to be the expected product from a double Wagner–Meerwein rearrangement.

scholarly journals 13C-Nuclear magnetic resonance spectra of unsaturated ketosteroids in sulfuric acid.

1984 ◽  
Vol 33 (10) ◽  
pp. 547-551 ◽  
Author(s):  
Hidetoshi TAKAGI ◽  
Toshiaki MIURA ◽  
Michiya KIMURA
Keyword(s):  
Nuclear Magnetic Resonance ◽  
Sulfuric Acid ◽  
Magnetic Resonance ◽  
Nuclear Magnetic Resonance Spectra ◽  
13C Nuclear Magnetic Resonance ◽  
Magnetic Resonance Spectra ◽  
Nuclear Magnetic

meso- and dl - .alpha.,.alpha.' -Bis(difluoramino)bibenzyls. Preparation and nuclear magnetic resonance spectra

1967 ◽  
Vol 32 (2) ◽  
pp. 466-468 ◽  
Author(s):  
Frederic Allan Johnson ◽  
Carolyn Haney ◽  
Travis Edward Stevens
Keyword(s):  
Nuclear Magnetic Resonance ◽  
Magnetic Resonance ◽  
Nuclear Magnetic Resonance Spectra ◽  
Magnetic Resonance Spectra ◽  
Nuclear Magnetic
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