1,721,016 research outputs found
Hypoglycemic compounds. Sulfanylurea derivatives containing amino acids and dipeptides. I
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Pyrazolo[3,4-d] [1,2,3]triazole-1-carboxamides and 5-alkylamino pyrazolo[3,4-d]oxazoles: synthesis and evaluation of the in vitro antifungal activity
No full textA series of N-alkyl-N'-(4-diazo-5-pyrazolyl)-ureas (4) was thermally and photochemically converted into pyrazolo [3,4-d][1,2,3]triazole derivatives (5,6) and 5-alkylaminopyrazolo[3,4-d]oxazoles (7) respectively. The products were tested for in vitro antifungal activity against Fusarium culmorum, Botrytis cinerea, Phoma betae, Pythium ultimum, Sclerotinia minor and Rhizoctonia solani. The MIC and ED50 values of compound (6) against some of the test fungi were comparable to those of the reference fungicides iprodione and mancozeb
Reactions of oxadiazinones with beta-enaminones Regioselective synthesis of pyrazolo-pyrazines and pteridines
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Imidazo[4,5-c]pyrazoles Synthesis of 4-,5- and 6-Substituted Derivatives
No full textThe syntheses of 4-, 5-, and 6-substituted imidazo[4,5-c]pyrazoles, compounds of potential biological activity, are reported. Copyright © 1996 Published by Elsevier Science Ltd
Synthesis of 6,7-Disubstituted Pteridine –2,4-Diones
No full textThe reaction of pyrimido[5,4-c][1,2,5]oxadiazin-3(5H)-one (1) with carbon nucleophiles afforded pteridine-2,4-diones (3) bearing a variety of substituents unequivocally positioned in the pyrazine ring. © 1991
Modificazioni molecolari di vitamine antiossidanti come mezzo per ottenere anti-aging
No full textModificazioni molecolari di vitamine antiossidanti come mezzo per ottenere anti-aging
Synthesis of 4‐thiocarbamoyl‐5‐aminopyrazoles
No full textAryl and t‐butylhydrazines react with 2‐cyano‐3‐ethoxythiocrotonamide affording 2‐cyano‐3‐aryl‐t‐butylhy‐drazinothiocrotonamides. These intermediates can be easily cyclized to 4‐thiocarbamoyl‐5‐aminopyrazoles by heating a few minutes in a strong base. Alkylhydrazines react with 2‐cyano‐3‐ethoxythiocrotonamide yielding directly a mixture of the cyclized compounds 4‐cyano‐5‐aminopyrazoles and 4‐thiocarbamoyl‐5‐aminopyr‐azoles. Copyright © 1985 Journal of Heterocyclic Chemistr
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