Big Chemical Encyclopedia

Chemical substances, components, reactions, process design ...

Articles Figures Tables About

Pyrazinecarbohydrazides

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]

Pyrazinecarbonyl chloride gave Af-methyl-2-pyrazinecarbohydrazide (133) [MeHNNH2, Et20, -35 20°C, slowly 36% the TV -methyl isomer (134)... [Pg.319]

PREPARATION. Pyrazinecarbohydrazides have been made by primary synthesis (see Chapters 1 and 2), from pyrazinecarboxylic esters (see Section 8.2.2), from pyrazinecarbonyl halides (see Section 8.2.3), and by transamination of pyrazinecarboxamides (see Section 8.4.2). [Pg.328]

Pyrazinecarbonyl azides have been made from pyrazinecarbonyl halides (see Section 8.3.2) but more usually from pyrazinecarbohydrazides with nitrous acid as exemplified here. [Pg.328]

Pyrrol-l-yl)-2-pyrazinecarbohydrazide (198) gave 3-(pyrrol-l-yl)-2-pyrazine-carbonyl azide (199) (AcOH—H20, NaN02, 20°C, 20 min 32%).94... [Pg.328]

Amino-6-methyl-5-phenyl-2-pyrazinecarbohydrazide (202) gave 3-amino-.V -isopropylidene-6-methyl-5-phenyl-2-pyrazinecarbohydrazide (203) (AcMe, reflux, 4 h > 73%).941... [Pg.329]

Pyrazinecarbohydrazide (204) and 4-ethoxymethylene-2-phenyloxazolin-5-one (206) gave N,N -bis(2-pyrazinecarbonyl)hydrazine (207) and 4-benzami-dopyrazolin-3-one (208) (dioxane, reflux, 30 min 90% the mechanism of hydrogen removal is discussed).1605... [Pg.329]

Amino-6-chloro-5-(A-methyl-(A-propyl amino)-2-pyrazinecarbohydrazide — (H 430)... [Pg.358]

Amino-5-chloro-6-thioxo-1,6-dihydro-2-pyrazinecarbohydrazide 3-Amino-6-chloro-5-thioxo-4,5-dihydro-2-pyrazinecarbohydrazide 3-Amino-6-cyano-5-methoxy-2-pyrazinecarboxamide 3-Amino-6-cyano-5-methoxy-2-pyrazine-carboxylic acid... [Pg.360]

Amino-6-cyclohexyl-2-pyrazinecarboxamide 3-Amino-5-cyclohexyl-2-pyrazinecarboxylic acid 3-Amino-6-cyclohexyl-2-pyrazinecarboxylic acid 3-Amino-/V-cyclopentyl-2-pyrazinecarboxamide 3-Amino-6-cyclopropyl-2-pyrazinecarbonitrile 3-Amino-6-cyclopropyl-2-pyrazinecarboxamide 3-Amino-6-cyclopropyl-2-pyrazinecarboxylic acid 3-Amino-5,6-dichloro-2-pyrazinecarbaldehyde 3-Amino-5,6-dichloro-2-pyrazinecarbonitrile 3-Amino-5,6-dichloro-2-pyrazinecarboxamide 3-Aniino-5,6-dichloro-2-pyrazinecarboxylic add 3-Amino-6-diethylaminomethyl-2-pyrazinecarbonitrile 3-Amino-5-diethylamino-2,6-pyrazinedicarbonitrile 5-Amino-3-dimethylamino-6-nitro-2-pyrazinecarbonitrile 3-Amino-5-dimethylamino-6-phenyl-2-pyrazinecarbohydrazide... [Pg.360]

Amino-5,6-dimethyl-2-pyrazinecarbohydrazide 3-Amino-5, /V-dimethyl-2-pyrazinecarboxamide 3-Amino-5,6-dimethyl-2-pyrazinecarboxamide 3-Amino-5,6-dimethyl-2-pyrazinecarboxylic acid 3 Anniio-5.6 dimelliyi 2(1//) pyTn/iiK thione... [Pg.361]

Amino-3,6-dimethyl-2(177)-pyrazinone 3-Amino-5,6-diphenyl-2-pyrazinecarbaldehyde 3-Amino-5,6-diphenyl-2-pyrazinecarbohydrazide 3-Amino-5,6-diphenyl-2-pyrazinecarbonitrile... [Pg.361]

Benzylthio-2-pyrazinecarbohydrazide 3-Benzylthio-2-pyrazinecarbonitrile 6-Benzylthio-2-pyrazinecarbonitrile 6-Benzylthio-2-pyrazinecarbothioamide 3-Benzylthio-2-pyrazinecarboxamide 6-Benzylthio-2-pyrazinecarboxamide 3-Benzylthio-2-pyrazinecarboxylic add 6-Benzylthio-2-pyrazinecarboxylic add 3-Benzylthi o-2,5-pyrazinedi carboxamide 2-Benzylthiopyrazine 4-oxide... [Pg.374]

See other pages where Pyrazinecarbohydrazides is mentioned: [Pg.1]    [Pg.313]    [Pg.313]    [Pg.318]    [Pg.328]    [Pg.328]    [Pg.328]    [Pg.329]    [Pg.329]    [Pg.355]    [Pg.356]    [Pg.356]    [Pg.357]    [Pg.357]    [Pg.357]    [Pg.357]    [Pg.358]    [Pg.358]    [Pg.358]    [Pg.358]    [Pg.358]    [Pg.358]    [Pg.358]    [Pg.358]    [Pg.359]    [Pg.359]    [Pg.359]    [Pg.359]    [Pg.359]    [Pg.359]    [Pg.361]    [Pg.363]    [Pg.363]    [Pg.363]    [Pg.365]    [Pg.366]    [Pg.382]    [Pg.383]   
See also in sourсe #XX -- [ Pg.328 ]

See also in sourсe #XX -- [ Pg.328 ]



SEARCH



3- -2-pyrazinecarbohydrazide

3- -2-pyrazinecarbohydrazide

Pyrazinecarbohydrazides Pyrazinecarboxamides

Pyrazinecarbohydrazides from pyrazinecarbonyl halides

Pyrazinecarbohydrazides from pyrazinecarboxylic esters

© 2024 chempedia.info