4-Hydrazinocarbonyl-3-methyl

Pyrimldin 5-Cyan-2-hydrazino-4-(hydrazinocarbonyl-methyl)-6-hydroxy- E16a, 778 (CC13 -> NH-NH2 COOR -CO-NH-NH2)... [Pg.384]

The same substrate (78) with ethyl chloroformate gave 2-[(AT -ethoxycarbonyl-hydrazinocarbonyl)methyl]-4-phenyl-1 (2//)-phthalazmone (81) (substrate, MeaNCHO, reflux, 15 min 80%). °... [Pg.338]

Durch Erhitzen von 4(5)-Azidocarbonyl-imidazol in tert.-Butanol wird in 41 % Ausbeute 4(5)-tert.-Butyloxycarbonylamino-imidazol erhalten998. Analog fiihrt die Umsetzung von 4(5)-Hydrazinocarbonyl-l-methyl-imidazol mit Natriumnitrit/Salzsaure nach anschlieBender Ther-molyse des so erhaltenen Carbonsaure-azids in tert.-Butanol zu 5-tert.-Butyloxycarbonyl-amino-I-methyl-imidazol (88%)999 ... [Pg.159]

So erhalt man bei der Reaktion von 3-Hydrazinocarbonyl-5-methyl-l,2-oxazol mit Phosgen als vermutliches Zwischenprodukt 3-(2-Chlorcarbonyl-hydrazinocarbonyl)-5-methyl-l,2-oxa-zol, das beim Erhitzen zu 2-Hydroxy-5-( 5-methyl-l, 2-oxazol-3-yl)-2-oxo-2,3-dihydro-1,3,4-oxa-diazol (32% Schmp. 225-226°) cyclisiert139 ... [Pg.531]

Quinoxalines are, in general, comparatively easy to prepare, and numerous derivatives have been prepared in work designed to produce biologically active materials. Quinoxaline W-oxides continue to be a focal point of study. Their reactions, as well as their pharmacological actions, continue to stimulate many investigations. Thus 2-methyl-quinoxaline (V,(V -dioxides substituted in the 3-position (e.g., with amide,2 amidino,3 hydrazinocarbonyl,4 and ester5 groups) are potent bacteriocides. [Pg.368]

Benzoxazol 2-(2-Ethoxycarbo-nyl-hydrazinocarbonyl)-5-methyl- E8a, 1138 (3-Cl-6-CH3-2-oxo —2H-l,4-benzoxazin + H2N-NH COOR)... [Pg.1009]

Hydroxy-6-methylpteridine NHjNH, 2-Amino-3-hydrazinocarbonyl- 424 5-methyl and isopropylidene derivative... [Pg.44]

Hydroxy-7-methylpteridine NHjNH, 3-Amino-2-hydrazinocarbonyl- 424 5-methyl... [Pg.44]

Hydrazinocarbonylpyrazine condensed with 4-cyanopyridine to give 2-[5 -(pyridin-4"-yl)-l//-r,2, 4 -triazol-3 -yl]pyrazine (S3) (1430), cyanoethylation of 2-hydrazinocarbonylpyrazine with cyanoethylene gave 2- 2 -[2 -(cyanoethyl)-hydrazino]carbonyl pyrazine (1317), and 2-[r-(isopropylidenehydrazinocarbonyl)-hydrazinocarbonyl]-5-methyl-3-methylaminopyrazine (54) heated with Raney nickel in ethanol gave 2-carbamoyl-5-methyl-3-methylaminopyrazine (428). [Pg.287]

Das Phenylhydrazon von Acetyl-5-hydroxy-3-methyl-l-phenyl-lH-pyrazol isomerisiert bei Einwirkung ethanolischer Salzsaure zu 3,5-Dimethyl- l-phenyl-4-( 1-phenyl-hydrazinocarbonyl)-lH-pyrazol (Schmp. 129°) 1736 ... [Pg.527]

Acetyl-2,4-dioxo-tetrahydropyrane bilden mit iiberschussigem Hydrazin-Hydrat zunachst isolierbare En-hydrazine, die zu 4-Hydrazinocarbonyl-3(5)-(2-hydroxy-alkyl)-5(3)-methyl-1 H-pyrazolen cyclisieren1193. [Pg.554]

Dimethy 1-2,4-dioxo-l -methoxycarbonyl-cyclobutan reagiert mit konzentriertem Hydrazin-Hydrat (oh-ne Losungsmittel) exotherm zu 5(3)-(l-Hydrazinocarbonyl-ethyl)-3( 5 )-hydroxy-4-methyl-1 H-pyrazol (Schmp. 2 1 2 - 2 1 30)1357 ... [Pg.571]

Hydrazinocarbonyl-l-methyl-4-(phenyl-ethinyl)-lH-pyrazol reagiert beim Erhitzen in Ge-genwart starker Basen unter Cyclisierung2122 ... [Pg.673]

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