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Covalent hydrates, oxidation ring-opening

These facts suggest that the imidazole ring in compounds 86, 330, 334 and 617 is first reversibly covalently hydrated in the acid medium to form 638, and then a hydrolytic ring opening occurs to provide intermediate 639. Then A -nitroso compound 640 forms and ring closes to afford l-methyl-l,2,3-triazolo[4,5-c]pyridine 637 (80KG121). The A -nitrosation occurs with nitrogen oxides formed from nitric acid reduction. [Pg.238]

See other pages where Covalent hydrates, oxidation ring-opening is mentioned: [Pg.72]    [Pg.252]    [Pg.800]    [Pg.135]    [Pg.72]    [Pg.252]    [Pg.800]    [Pg.72]    [Pg.252]    [Pg.800]    [Pg.173]    [Pg.800]    [Pg.343]    [Pg.330]   
See also in sourсe #XX -- [ Pg.38 , Pg.39 ]

See also in sourсe #XX -- [ Pg.38 , Pg.39 ]

See also in sourсe #XX -- [ Pg.38 , Pg.39 ]

See also in sourсe #XX -- [ Pg.38 , Pg.39 ]



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Covalent hydrates

Covalent hydrates, oxidation

Hydrates oxidation

Hydration oxidation

Oxide ring

Oxides hydrated

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