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Prebiotic synthesis of imidazole-4-acetaldehyde, imidazole-4-glycol and imidazole-4-ethanol
Origins of life and evolution of the biosphere, 1986A wide var iety of chemical processes have been used for the synthesis of amino acids from prebiot ic molecular precursors under plausible pr imi t ive Earth conditions (M i l l e r , 1982). The prebiot ic formation of a l l protein-type amino acids has been demonstrated except for three amino acids: h is t id ine , lys ine, and arginine (Weber and Mi ...
C. Shen, L. Yang, S. L. Miller, J. Oró
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Biochimica et Biophysica Acta (BBA) - Protein Structure and Molecular Enzymology, 1984
Abstract Myoglobin is photooxidized when exposed to visible light in the presence of a sensitizer. In 8 M urea medium this photooxidation is followed by photodynamic interpeptide crosslinking. A partial inhibition of crosslinking is caused by lysine, mercaptoethanol and hydroxylamine, and by amidination of NH2 groups in the protein molecule. Complete
J. Van Steveninck +2 more
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Abstract Myoglobin is photooxidized when exposed to visible light in the presence of a sensitizer. In 8 M urea medium this photooxidation is followed by photodynamic interpeptide crosslinking. A partial inhibition of crosslinking is caused by lysine, mercaptoethanol and hydroxylamine, and by amidination of NH2 groups in the protein molecule. Complete
J. Van Steveninck +2 more
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Archiv der Pharmazie, 1986
AbstractBei der Umsetzung von α‐(3,4‐Dihydroisochinolinium)‐ketonen mit Hydroxylamin bei pH 4–5 entstehen keine Oxime, sondern kondensierte Imidazolderivate. Durch Modellversuche wird ein Reaktionsverlauf über ein N‐substituiertes Hydroxylamin ausgeschlossen.
Hans Möhrle, Barbara Grimm
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AbstractBei der Umsetzung von α‐(3,4‐Dihydroisochinolinium)‐ketonen mit Hydroxylamin bei pH 4–5 entstehen keine Oxime, sondern kondensierte Imidazolderivate. Durch Modellversuche wird ein Reaktionsverlauf über ein N‐substituiertes Hydroxylamin ausgeschlossen.
Hans Möhrle, Barbara Grimm
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Computational study of imidazole and methyl imidazoles
Journal of Molecular Structure: THEOCHEM, 1994Abstract A semiempirical and ab initio study of the structures of imidazole, methyl imidazoles and the corresponding protonated and deprotonated ions is presented. The energies of the different isomers and tautomers are discussed and the protonation and deprotonation energies are given.
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