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[55] Chromatographic analysis of pteridines
1980Publisher Summary This chapter discusses the chromatographic analysis of pteridines. Pteridines are present in almost all types of biological tissues. Tetrahydrobiopterin is of interest to many investigators because of its probable role as a cofactor in vivo in mediating several mixed-function oxygenases.
Jon C. Nixon, Takeshi Fukushima
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, 2012
The syntheses of six new mixed P/S-donor two-coordinate AuI complexes are described. The complexes incorporate a pteridinyl ligand coordinated through a thiolate donor, and an ancillary tertiary phosphane (PPh3 or PCy3).
L. A. Mullice +3 more
semanticscholar +1 more source
The syntheses of six new mixed P/S-donor two-coordinate AuI complexes are described. The complexes incorporate a pteridinyl ligand coordinated through a thiolate donor, and an ancillary tertiary phosphane (PPh3 or PCy3).
L. A. Mullice +3 more
semanticscholar +1 more source
Pteridine studies. Part XXXVI. The action of acid and alkali on pteridine
Journal of the Chemical Society C: Organic, 1968Investigation of the action of acid and alkali on pteridine shows that 2-amino-3-formylpyrazine (IIa) is liberated so quickly that 2-formamido-3-formylpyrazine (IIb), the most likely intermediate, is not detectable. Improved preparative methods for pteridine and 2-amino-3-formylpyrazine are reported.
Adrien Albert, Hiroshi Yamamoto
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Unconjugated pteridines in human milk
Clinica Chimica Acta, 1982Defective de novo synthesis of tetrahydrobiopterin (BH4) has been reported as being responsible for neonatal hyperphenylalaninemia. The presence of BH4 and its derivatives in human milk is confirmed but the vitamin-like effectiveness of the BH4 supplied by human milk appeared doubtful.
Jean-Louis Dhondt +2 more
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Helvetica Chimica Acta, 2008
AbstractA variety of pyrimidine precursors 12–25 were converted into a series of new 7‐hydroxylumazines (=7‐hydroxypteridine‐2,4(1H,3H)‐diones) 26–35 which functioned as starting materials for the transformation into the corresponding 7‐chlorolumazines 36–45.
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AbstractA variety of pyrimidine precursors 12–25 were converted into a series of new 7‐hydroxylumazines (=7‐hydroxypteridine‐2,4(1H,3H)‐diones) 26–35 which functioned as starting materials for the transformation into the corresponding 7‐chlorolumazines 36–45.
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On the proton affinity of pteridine
Journal of Heterocyclic Chemistry, 1974AbstractAll‐valence‐electron and perturbation calculations suggest that pteridine may preferably be protonated at the pyrazine moiety. Correlation between these results and some experimental data is presented.
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Pteridines. IX. Some pteridine isomers of triamterene
Journal of Medicinal Chemistry, 1968Joseph Weinstock, Roberta Y. Dunoff
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ChemInform Abstract: Electrolysis of Pteridines
ChemInform, 1985R. Gottlieb, W. Pfleiderer
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