ChemInform Abstract: STEROID-ACID COLOR REACTIONS. PART II. CARBON-13 NUCLEAR MAGNETIC RESONANCE AND ULTRAVIOLET SPECTRA OF PROTONATED ANDROST-4-ENE-3,17-DIONE, PREGN-4-ENE-3,20-DIONE, AND ANDROST-4-ENE-3,11,17-TRIONE

1976 ◽  
Vol 7 (37) ◽  
pp. no-no
Author(s):  
ANTHONY R. BUTLER ◽  
HOWARD A. JONES
Keyword(s):  
Nuclear Magnetic Resonance ◽  
Magnetic Resonance ◽  
Ultraviolet Spectra ◽  
Color Reactions ◽  
Acid Color ◽  
Nuclear Magnetic

THE PRINCIPAL CONFORMATIONS OF SOME ORTHO-SUBSTITUTED DIPHENYL ETHERS

1964 ◽  
Vol 42 (11) ◽  
pp. 2549-2559 ◽  
Author(s):  
W. D. Chandler ◽  
W. MacFarlane Smith ◽  
R. Y. Moir
Keyword(s):  
Nuclear Magnetic Resonance ◽  
Magnetic Resonance ◽  
Hydrochloric Acid ◽  
Conformational Isomers ◽  
Ultraviolet Spectra ◽  
Diphenyl Ethers ◽  
Nuclear Magnetic

A study of the nuclear magnetic resonance, infrared, and ultraviolet spectra showed that some doubly and triply ortho-substituted diphenyl ethers adopt, principally but not exclusively, the "H-inside" conformation, while the quadruply ortho-substituted 7-(4′-carbomethoxy-2′,6′-dinitrophenoxy)metameconine (V) adopts the "methoxy-inside"conformation. Interconversion of conformational isomers is extremely fast. Reduction of methyl 4-methoxy-3-nitrobenzoate with tin and hydrochloric acid gave methyl 3-amino-2-chloro-4-methoxybenzoate.

THIAZOLOISOQUINOLINES: II. THE SYNTHESIS OF THIAZOLO[5,4-c]ISOQUINOLINE

1966 ◽  
Vol 44 (21) ◽  
pp. 2473-2480 ◽  
Author(s):  
Catherine E. Hall ◽  
Alfred Taurins
Keyword(s):  
Nuclear Magnetic Resonance ◽  
Magnetic Resonance ◽  
Chlorine Atom ◽  
Ultraviolet Spectra ◽  
Chloro Derivative ◽  
Derivatives Of ◽  
Nuclear Magnetic

Thiazolo[5,4-c]isoquinoline (I) has been synthesized by cyclization of 4-amino-3-thiocyano-isoquinoline (IX) to 2-aminothiazolo[5,4-c]isoquinoline (X), which was converted into I via the 2-chloro derivative XI. Some 2-substituted derivatives of I were obtained by displacement of the chlorine atom in XI. The attempted preparation of 3-chloro-4-nitroisoquinoline as an intermediate in the synthesis of I was unsuccessful. Nuclear magnetic resonance and ultraviolet spectra of I and its derivatives were investigated.

Nuclear magnetic resonance and ultraviolet studies of the effect of p2H on reduced nicotinamide–adenine dinucleotide

1970 ◽  
Vol 48 (9) ◽  
pp. 947-952 ◽  
Author(s):  
P. R. Griffith ◽  
M. J. Nye ◽  
J. C. Alexander
Keyword(s):  
Nuclear Magnetic Resonance ◽  
Magnetic Resonance ◽  
Nuclear Magnetic Resonance Spectrum ◽  
Nicotinamide Adenine Dinucleotide ◽  
Resonance Spectrum ◽  
Chemical Shifts ◽  
Ultraviolet Spectra ◽  
Proton Peak ◽  
Reduced Nicotinamide Adenine Dinucleotide ◽  
Nuclear Magnetic

The effect of p2H on the chemical shifts of two adenine protons and one reduced nicotinamide proton of β-NADH have been examined. The adenine protons had a single pK at a p2H 3.85. The reduced nicotinamide proton showed no pK in the range p2H 3.00 to p2H 7.00. At low p2H values a new peak appeared in the nuclear magnetic resonance spectrum 0.31 p.p.m. downfield from the nicotinamide C-2 proton of β-NADH, and the nicotinamide C-2 proton peak gradually disappeared. It is suggested that this new peak is responsible for some of the anomalies in published results. The alterations in the ultraviolet spectra also indicate a change in the structure within the reduced nicotinamide moiety of β-NADH at low p2H values.

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