2-Amino-4-hydroxy-7-methylpteridine

Amino-4-hydroxy- p-Amino-6-methylpteridine benzoic acid L-GIu... [Pg.22]

Hydroxy-6-methylpteridine NaOH 2-Amino-3-carboxy-5-m ethyl 421,424... [Pg.40]

Hydroxy-7 -methylpteridine NaOH 3-Amino-2-earboxy-5-methyl 421,424... [Pg.40]

Hydroxy-6-methylpteridine NHjNH, 2-Amino-3-hydrazinocarbonyl- 424 5-methyl and isopropylidene derivative... [Pg.44]

Hydroxy-7-methylpteridine NHjNH, 3-Amino-2-hydrazinocarbonyl- 424 5-methyl... [Pg.44]

Amino-5-bromo-3-carbamoylpyrazine heated with trifluoroacetamide and sodium ethoxide (or butoxide) gave 6-ethoxy(or butoxy)-4-hydroxy-2-trifluoro-methylpteridine (49) (987) and 2-chloro-3-pyridiniopyrazine chloride with methoxide ion gave 2,3-dimethoxypyrazine (765). 2-Amino-3-bromo-5-phenyl-pyrazine with sodium methoxide in methanol at 134° for 8 hours formed 2-amino-3-methoxy-5-phenylpyrazine (365a) and 3-bromo-2-hydroxy-5-phenylpyrazine similarly treated gave 2-hydroxy-3-methoxy-5-phenylpyrazine (365a). [Pg.135]

Equilibria in aqueous solutions of pteridine have been investigated. When pteridine was added to acid, the cation of 4-hydroxy-3,4-dihydropteridine was rapidly formed and this slowly underwent ring fission to the cation of 2-amino-methyleneamino-3-formylpyrazine. Both 2- and 7-methylpteridine behaved similarly 4-methylpteridine gave 3-acetyl-2-aminomethyleneaminopyrazine, but production of 44iydroxy-4-methyl-3,4-dihydropteridine could not be demonstrated (1167). [Pg.206]

MPT methanopterin (2-amino-4-hydroxy-7-methylpteridine), NHE, normal hydrogen electrode... [Pg.32]

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