Les pyrazolo[3,4-d]pyrimidines et pyrazolo[4,3-d]pyrimidines ont été préparés via réarrangement de Curtius des 4-methoxycarbonyl-1,3-diphenyl-5-carboxypyrazole et 5-methoxycarbonyl-1,3-diphenyl-4-carboxypyrazole suivi d’une condensation d’une série d’α- aminoacides. L’addition d’anhydrides appropriés sur les amino-acides pyrazoliques permet l’obtention des pyrazolo[3,4-d]oxazines et pyrazolo[4,3-d]oxazines avec de bons rendements.Preparation of pyrazolo[3,4-d]pyrimidines and pyrazolo[4,3-d]pyrimidines were made up via Curtius rearrangement of 4-methoxycarbonyl-1,3-diphenyl-5-carboxypyrazole and 5-methoxycarbonyl-1,3-diphenyl-4-carboxypyrazole followed by condensation of some α-DL-aminoacids. The addition of appropriate anhydrides on to isom...
N-Bis(methylthio)methylenecyanamide (1) was allowed to react with ethylcyanoacetate or malononitrile...
The broad spectrum of biological activity of pyrazolo[4,3-c]heterocyclic derivatives is the main of ...
We describe the synthesis of so far synthetically not accessible 3,6-substituted-4,6-dihydro-3H-pyra...
Reaction of ethyl imidates derived from N-aryl-5-amino-4-cyanopyrazoles with amines or arylhydrazin...
We have developed an effective method for the preparation of 1-alkyl(aryl)-3-[4-(hydroxymethyl)-1Н-p...
Pyrazol[3,4-c]quinoline 4a is obtained from 4-(2-riitrophenyl)pyrazole-3-carboxylate (3a) by reducti...
The reaction of N1-substituted-5-amino-4-cyanopyrazoles with malononitrile and diethylmalonate occur...
Nos travaux de thèse portent sur la mise au point de nouvelles méthodes de synthèse permettant l’acc...
The development of heterocyclic chemistry is important for various science areas and for the industr...
A practical three-component method for the synthesis of pyrazolo[3,4-d]pyrimidin-4-ones was develope...
A Simple Facile One-pot reaction, novel and efficient rout for the synthesis of substituted pyrazolo...
We describe the synthesis of so far synthetically not accessible 3,6-substituted-4,6-dihydro-3H-pyra...
Reaction of 6-amino-3-methyl-4-(substituted phenyl)-1,4-dihydropyrano[2,3-c]pyrazole-5-carbonitrile ...
Reaction of 6-amino-3-methyl-4-(substituted phenyl)-1,4-dihydropyrano[2,3-c]pyrazole-5-carbonitrile ...
Abstract3,6-Dimethyl-1-phenyl-1H-pyrazolo[3,4-d]pyrimidin-4(5H)-one 3 was prepared by an intramolecu...
N-Bis(methylthio)methylenecyanamide (1) was allowed to react with ethylcyanoacetate or malononitrile...
The broad spectrum of biological activity of pyrazolo[4,3-c]heterocyclic derivatives is the main of ...
We describe the synthesis of so far synthetically not accessible 3,6-substituted-4,6-dihydro-3H-pyra...
Reaction of ethyl imidates derived from N-aryl-5-amino-4-cyanopyrazoles with amines or arylhydrazin...
We have developed an effective method for the preparation of 1-alkyl(aryl)-3-[4-(hydroxymethyl)-1Н-p...
Pyrazol[3,4-c]quinoline 4a is obtained from 4-(2-riitrophenyl)pyrazole-3-carboxylate (3a) by reducti...
The reaction of N1-substituted-5-amino-4-cyanopyrazoles with malononitrile and diethylmalonate occur...
Nos travaux de thèse portent sur la mise au point de nouvelles méthodes de synthèse permettant l’acc...
The development of heterocyclic chemistry is important for various science areas and for the industr...
A practical three-component method for the synthesis of pyrazolo[3,4-d]pyrimidin-4-ones was develope...
A Simple Facile One-pot reaction, novel and efficient rout for the synthesis of substituted pyrazolo...
We describe the synthesis of so far synthetically not accessible 3,6-substituted-4,6-dihydro-3H-pyra...
Reaction of 6-amino-3-methyl-4-(substituted phenyl)-1,4-dihydropyrano[2,3-c]pyrazole-5-carbonitrile ...
Reaction of 6-amino-3-methyl-4-(substituted phenyl)-1,4-dihydropyrano[2,3-c]pyrazole-5-carbonitrile ...
Abstract3,6-Dimethyl-1-phenyl-1H-pyrazolo[3,4-d]pyrimidin-4(5H)-one 3 was prepared by an intramolecu...
N-Bis(methylthio)methylenecyanamide (1) was allowed to react with ethylcyanoacetate or malononitrile...
The broad spectrum of biological activity of pyrazolo[4,3-c]heterocyclic derivatives is the main of ...
We describe the synthesis of so far synthetically not accessible 3,6-substituted-4,6-dihydro-3H-pyra...