The nuclear magnetic resonance spectrum of 2:3-dibromobutyric acid; a negative long-range spin coupling constant

1962 ◽  
Vol 5 (1) ◽  
pp. 85-90 ◽  
Author(s):  
R. Freeman ◽  
K. Pachler
Keyword(s):  
Nuclear Magnetic Resonance ◽  
Magnetic Resonance ◽  
Nuclear Magnetic Resonance Spectrum ◽  
Long Range ◽  
Resonance Spectrum ◽  
Spin Coupling ◽  
Coupling Constant ◽  
Spin Coupling Constant ◽  
Nuclear Magnetic

SYNTHESIS AND NUCLEAR MAGNETIC RESONANCE SPECTRUM OF 3′,4′,6′-TRI-O-ACETYL-2-(METHYLTHIO)-D-GLUCOPYRANO[2′,1′:4,5]-2- THIAZOLINE

1966 ◽  
Vol 44 (1) ◽  
pp. 94-97 ◽  
Author(s):  
Teiichiro Ito
Keyword(s):  
Nuclear Magnetic Resonance ◽  
Magnetic Resonance ◽  
Nuclear Magnetic Resonance Spectrum ◽  
Long Range ◽  
Trifluoroacetic Acid ◽  
Resonance Spectrum ◽  
Coupling Constants ◽  
Nuclear Magnetic

1,3,4,6-Tetra-O-acetyl-2-deoxy-2-(dithiocarbomethoxy)-2-amino-β-D-glucopyranose, when it was treated with trifluoroacetic acid, gave 3′,4′,6′-tri-O-acetyl-2-(methylthio)-D-glucopyrano-[2′,1′:4,5]-2-thiazoline (III). Compound III showed a nuclear magnetic resonance spectrum capable of full interpretation. Long-range coupling between H2 and H4 was observed. The conformation of this compound in solution was discussed on the basis of the coupling constants for ring hydrogens.

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