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2-Acetoxy-3.6-dibenzyl-5 methoxypyrazine

Acetoxy-3,6-dibenzyl-5-methoxypyrazine gave 3,6-di benzyl-5-methoxy-2(l//) -pyrazinone (29) (K2C03, MeOH—H20, reflux, 30 min > 95%) 312 2,5-diace-toxy-3,6-dimethylpyrazine gave 5-hydroxy-3,6-dimethyl-2(l//)-pyrazinone (30) (KHC03, MeOH, reflux, 50 min 53%).1386... [Pg.194]

Methoxy-3,6-dimethylpyrazine 4-oxide (283) gave only 2-acetoxymethyl-3-methoxy-5-methylpyrazine (284) (neat AC2O, reflux, 1 h 88%) 324 in contrast, the homologous substrate, 2,5-dibenzyl-3-methoxypyrazine 1-oxide (285), gave a separable mixture of 2-(a-acetoxybenzyl)-5-benzyl-3-methoxy-pyrazine (286) and 2-acetoxy-3,6-dibenzyl-5-methoxypyrazine (287) (neat Ac20, reflux, 90 min 55 and 20%, respectively).312... [Pg.236]

See other pages where 2-Acetoxy-3.6-dibenzyl-5 methoxypyrazine is mentioned: [Pg.122]    [Pg.122]    [Pg.352]    [Pg.122]    [Pg.122]    [Pg.122]    [Pg.122]    [Pg.352]    [Pg.122]    [Pg.122]   
See also in sourсe #XX -- [ Pg.236 ]



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