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Methyl 2-pyrazinecarboxylate

CjjHjjOj 35363-65-6) see Dimethisterone methyl pyrazine-2-carboxylate (QH N202 6164-79-0) see Pyrazinamide 5-methyl-2-pyrazinecarboxylic acid (QHfiN202 5521-55-1) see Adpimox Glipizide 5-methylpyrazine-2-carboxylic acid see under 5-methyl-2-pyrazinecarboxylic acid... [Pg.2422]

Valuable organic acids of industrial interest can be recovered from aqueous waste solutions, for example, from an enzymatic resolution process. Mass-transfer data for MBSE and MBSS in HF contactors for dimethylcydopropanecarboxylic acid (DMCCA) [97] and 5-methyl-2-pyrazinecarboxylic add (MPCA) [95, 96] have been estimated. Processes for recovery of DMCCA from a highly addic waste solution with pH below 2 containing about 19kgm 3 of DMCCA by MBSE and MBSS have been suggested [98], A solvent with 0.4 kmol m 3 of TOA in n-alkanes (dodecane fraction) was used. A recovery of more than 90% of DMCCA and a concentrate with about 200 kg m-3 of DMCCA can be achieved. [Pg.522]

Kubisova, L ., Sabolova, E., Schlosser, ., Martak, J. and Kertesz, R. (2004) Mass-transfer in membrane-based solvent extraction and stripping of 5-methyl-2-pyrazinecarboxylic acid and co-transport of sulphuric add in HF contactors. Desalination, 163, 27. [Pg.536]

Hydroxyiminopropionaldehyde dimethyl acetal (264) and ethyl 2-formamido-2-formylacetate (265) gave ethyl 5-methyl-2-pyrazinecarboxylate 4-oxide (266) (HCl/AcMe, reflux %).1167... [Pg.36]

Dimethyl 2,3-pyrazinedicarboxylate gave l-ethyl-2,3-dimethoxycarbonylpyrazinium tetrafluoroborate (347) (Et3OBF4, C1CH2CH2C1, reflux, 2 h 80%) 415 methyl 2-pyrazinecarboxylate gave 3-methoxycarhonyl-l -methylpyrazininm iodide (348)... [Pg.131]

Methyl 3-oxo-3,4-dihydro-2-pyrazinecarboxylate (22) gave methyl 3-chloro-2-pyrazinecarboxylate (23) (S02C1, trace Me2NCHO, PhMe, 80°C, N2, 3 h 80%) 54 the isomeric substrate, methyl 5-oxo-4,5-dihydro-2-pyrazinecarboxy-late, gave methyl 5-chloro-2-pyrazinecarboxylate (24, R = H) (neat POCl3, trace Me2NCHO, reflux, 2 h 68%) 85 and the homologous methyl 5-chloro-6-methyl-2-pyrazinecarboxylate (24, R = Me) (77%) was made similarly.85... [Pg.141]

Chloromethyl-5-methylpyrazine (283) gave 5-methyl-2-pyrazinecarboxylic acid (284) [K2C03, H20—Bu OH, 60°C, electrolysis (freshly made nickel hydroxide anode Ni alloy cathode) 82% possibly via the hydroxymethyl intermediate but mechanism not elucidated].221... [Pg.190]

Methyl 2-pyrazinecarboxylate 1-oxide (221) and the isomeric 4-oxide (K2S208, H2S04, 10 — 20°C, 24 h, chromatographic separation substrate (37%), 1-oxide (15%), 4-oxide (7%)].1300... [Pg.227]

Acipimox, 5-methyl-2-pyrazinecarboxylic acid 4-oxide, antihyperlipidaemic [51037-30-0],... [Pg.240]

Methyl-2-pyrazinecarboxamide 4-oxide (10, R = NH2) gave 5-methyl-2-pyrazinecarboxylic acid 4-oxide (10, R = OH) (2.5 M NaOH, reflux, 30 min ... [Pg.301]

Methyl-2,3-pyrazinedicarboxylic acid (24, Q = R = C02H) gave a mixture of 5-methyl-2-pyrazinecarboxylic acid (24, Q = H, R = C02H) and 6-methyl-2-pyrazinecarboxylic acid (24, Q = C02H, R = H), in which the former predominated (sublimed at 185°C under reduced pressure 72% before separation as derivatives).477... [Pg.303]

Dichloro-5-methyl-2-pyrazinecarboxylic acid (30, R = H) gave methyl 3,6-dichloro-5-methyl-2-pyrazinecarboxylate (30, R = Me) (CH2N2, Et20, 20°C, 30 min 84%).80... [Pg.304]

Pyrazinecarboxylic acid (32, R = H) gave methyl 2-pyrazinecarboxylate (32, R = Me) (MeOH, trace H2S04, reflux, 48 h 85-95%)236,460 or the corresponding ethyl ester (82, R = Et) (EtOH, H2S04, reflux, 7 h 74%) 896 3-amino-2-pyrazinecarboxylic acid gave methyl 3-amino-2-pyrazinecarboxy-late (MeOH, H2S04, 65°C, 2 h 57%).332... [Pg.304]

Methyl 2-pyrazinecarboxylate (90) gave A -methyl-2-pyrazinecarbohydrazide (89) without any of the. V-m ethyl isomer (91) [MeHNNH2, EtOH, reflux, 12 h 81% the isomer (91) can be made from 2-pyrazinecarbonyl chloride see Section 8.3.2] analogous esters behaved similarly to give, for example, 3-amino-/V -methyl-2-pyrazinecarbohydrazide (71%).1265... [Pg.313]

Methyl 2-pyrazinecarboxylate (103, R = Me) gave 2-(methoxycarbony-lacetyl)pyrazine (102) (AcOMe, NaH, trace MeOH, MeOCH2CH2OMe, A, reflux, < 6 h 33%).410... [Pg.315]

Methyl 2-pyrazinecarboxylate (108) and 3-aminocrotonamide gave 6-methyl-2-(pyrazin-2-yl)-4(3f/)-pyrimidinone (109) (EtONa, EtOH, reflux, 3 h ... [Pg.316]

Chloro-5-methylpyrazine 2-Chloro-6-methylpyrazine 6-Chloro-A,-methyl-2-pyrazinecarboxamidine 6-Chloro-5-methyl-2-pyrazinecarboxylic acid 5-Chloro-6-methyl-2-pyrazinecarboxylic acid 1-oxide... [Pg.393]

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]

Ethyl 3-methyl-2-pyrazinecarboxylate Ethyl 5-methyl-2-pyrazinecarboxylate 4-oxide... [Pg.422]

Methyl 3-amino-6-bromo-5-ethoxycarbonylmethyl-2-pyrazinecarboxylate Methyl 3-amino-6-bromo-5-methyl-2-pyrazinecarboxylate Methyl 3-amino-6-bromo-5-phenyl-2-pyrazinecarboxylate... [Pg.438]

Methyl 6-amino-5-cyano-3-methyl-2-pyrazinecarboxylate 145-146, IR, NMR 759, 1677t... [Pg.440]

Methyl 3-chloroformyl-2-pyrazinecarboxylate Methyl 6-chloro-5-methoxy-3-oxo-3,4-dihydro-2-pyrazinecarboxylate Methyl 6-chloro-3-methoxy-2-pyrazinecarboxylate Methyl 3-chloro-5-methyl-2-pyrazinecarboxylate Methyl 5-chloro-6-methyl-2-pyrazinecarboxylate Methyl 5-chloro-6-methyl-2-pyrazinecarboxylate 1-oxide Methyl 6-chloro-3-nitro-2-pyrazinecarboxylate Methyl 6-chloro-3-oxo-3,4-dihdyro-2-pyrazinecarboxylate... [Pg.444]

See other pages where Methyl 2-pyrazinecarboxylate is mentioned: [Pg.34]    [Pg.157]    [Pg.531]    [Pg.209]    [Pg.213]    [Pg.302]    [Pg.305]    [Pg.306]    [Pg.310]    [Pg.314]    [Pg.315]    [Pg.315]    [Pg.319]    [Pg.356]    [Pg.403]    [Pg.409]    [Pg.420]    [Pg.423]    [Pg.435]    [Pg.435]    [Pg.437]    [Pg.440]    [Pg.440]   
See also in sourсe #XX -- [ Pg.304 , Pg.305 , Pg.310 ]

See also in sourсe #XX -- [ Pg.304 , Pg.305 , Pg.310 ]



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2-pyrazinecarboxylate

3-Amino-5-methyl-2-pyrazinecarboxylic

5-Methyl-2-pyrazinecarboxylic acid 4-oxide

Methyl 2-pyrazinecarboxylate 1-oxide

Methyl 2-pyrazinecarboxylate hydrolysis

Methyl 3-amino-2-pyrazinecarboxylate

Methyl 3-azido-2-pyrazinecarboxylate

Methyl 3-nitro-2-pyrazinecarboxylate

Methyl 5-pentyl-2-pyrazinecarboxylate

Methyl 6-chloro-5- -2-pyrazinecarboxylate

Methyl-pyrazinecarboxylic acid

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