6- Oxo-l,5-dihydro-2-pyrazinecarboxylic

Pyrazinecarboxylic acid underwent microbiological hydroxylation to give 3-oxo-3,4-dihydro- (36, R = H) (Alcaligenes eutrophus 70%), 5-oxo-4, 5-dihydro- (37) (.Pseudomonas acidovorans 96%), or 6-oxo-l,6-dihydro-2-pyrazinecarboxylic acid (38) (Alcaligenes faecalis 85%) 1091 Similar procedures afforded 5-chloro-3-oxo-3,4-dihydro-2-pyrazinecarboxylic acid (Alcaligenes eutrophus 50%) and 5-oxo-4,5-dihydro-2-pyrazinecarbonitrile (Agrobacterium sp 78%).1091... [Pg.195]

Hydroxymethyl-2(l/7)-pyrazinone 4-oxide (142) gave 6-oxo-l,6-dihydro-2-pyrazinecarboxylic acid 4-oxide (143) ( Ni peroxide , NaOH, H20, 20°C, 4 h 40%).89... [Pg.213]

S c- Buty 1-5 - methylpyrazine 2-Butyl-6-methylpyrazine 2-5, c-Butyl-6-methylpyrazine 2-te rt- B utyl - 6- methylpyrazine 2-s c- Buty 1-5 - methylpyrazine 4-oxide 6-s c-Butyl-3-methyl-2(l /)-pyrazinone Butyl 6-oxo-l,6-dihydro-2-pyrazinecarboxylate 4-oxide 2-Butyl-3-pivalamidopyrazine 2-sec-Butyl-3-pivalamidopyrazine... [Pg.382]

Methyl 5-oxo-4,5-dihydro-2-pyrazinecarboxylate Methyl 6-oxo-l,6-dihydro-2-pyrazinecarboxylate Methyl 6-oxo-l,6-dihydro-2-pyrazinecarboxylate... [Pg.447]

Ethyl 3-amino- l-benzyl-5-isobutyl-6-oxo-1,6-dihydro-2-pyrazinecarboxylate 4-oxide Ethyl 3-amino-6-benzyloxy-5-isobutyl-2-pyrazinecarboxylate 4-oxide Ethyl 3-amino-6-chloro-5-ethoxy-2-pyrazinecarboxylate Ethyl 6-amino-3-chloromethyl-5-cyano-2-pyrazinecarboxylate Ethyl 6-amino-3-chloromethyl-5-cyano-2-pyrazinecarboxylate 1-oxide Ethyl 3-amino-5-chloro-6-methyl-2-pyrazinecarboxylate Ethyl 3-amino-5-chloro-6-phenyl-2-pyrazinecarboxylate Ethyl 5-amino-6-cyano-3-methyl-2-pyrazinecarboxylate Ethyl 6-amino-5-cyano-3-methyl-2-pyrazinecarboxylate Ethyl 6-amino-5-cyano-3-methyl-2-pyrazinecarboxylate 1-oxide Ethyl 3-amino-5,6-dimethyl-2-pyrazinecarboxylate 5-Ethylamino-6-ethylcarbamoyl-3-methylami no-2-pyrazinecarboxamide... [Pg.419]

Ethyl 3-amino-5-isobutyl-6-oxo-1,6-dihydro-2-pyrazinecarboxylate 4-oxide Ethyl 3-amino-5-isopropenyl-6-methyl-2-pyrazinecarboxylate 4-oxide Ethyl 3-amino-6-(2-methylprop-l-enyl)-2-pyrazinecarboxylate 4-oxide... [Pg.419]

Methyl 3-amino-6-ethyl-2-pyrazinecarboxylate Methyl 3-amino-6-iodo-2-pyrazinecarboxylate Methyl 3-amino-5-isobutyl-6-oxo-l,6-dihydro-... [Pg.441]

A-Melliyl 6 oxo l.(>dihydro 2-pyrazinecarboxamide 4-oxide Methyl 3-oxo-3,4-dihydro-2-pyrazinecarboxylate... [Pg.446]

Methyl 3-bromo-6-chloro-5-dimethylamino-2-pyrazinecarboxylate Methyl 3-bromo-6-chloro-5-ethylamino-2-pyrazinecarboxylate Methyl 3-bromo-6-chloro-2-pyrazinecarboxylate Methyl 6-bromo-3-cyclopropylamino-2-pyrazinecarboxylate Methyl 6-bromo-3-dimethylamino-2-pyrazinecarboxylate Methyl 6-bromo-3-methylamino-2-pyrazinecarboxylate Methyl 6-bromo-3-methylthio-2-pyrazinecarboxylate Methyl 6-bromo-3-oxo-3,4-dihydro-2-pyrazinecarboxylate Methyl 3-bromo-2-pyrazinecarboxylate Methyl 6-bromo-2-pyrazinecarboxylate I-(3-Methyl but-2-cnyl)-2(l //)-pyrazinone 4-oxide... [Pg.443]

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