Pyrazolo[1,5-a]pyrimidine derivatives and anti-inflammatory...

C - Chemistry – Metallurgy – 07 – D

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C07D 487/04 (2006.01) A61K 31/505 (2006.01)

Patent

CA 2107479

Pyrazolo[1,5-a]pyrimidine derivatives of the formula: (see fig.I) wherein R1, R2, R3 and R4 are H, carboxyl, lower alkoxy-carbonyl, phenyl, lower alkyl optionally having a substituent selected from OH, carboxyl and lower alkoxy-carbonyl, or cycloalkyl, or R1 and R2 may combine each other to form lower alkylene; R5 is group of -SR6 or group of -NR7R8 in which R6 is pyridyl or phenyl optionally having 1 to 3 substituents selected from OH and lower alkyl; and R7 and R8 are H, phenyl optionally having 1 to 3 substituents selected from OH, lower alkyl, lower alkoxycarbonyl and carboxyl, or R7 and R8 may combine each other to form with a nitrogen atom with which they bond 1-pyrrolidinyl, 2-oxo-1-pyrrolidinyl, or 1-piperazinyl group substituted by a phenyl group optionally being substituted by halogen or trihalomethyl, hydroxy-lower alkyl or diphenyl-lower alkyl, or a salt thereof, and anti-inflammatory agent containing as active ingredient compound of the above formula, wherein R1, R3 and R4 are H, R2 is lower alkyl or cycloalkyl, R5 is group of -NR7R8 (R7 is H, R8 is phenyl substituted by OH and two lower alkyl).

Dérivés de la pyrazolo[1,5-a]pyrimidine de formule : (voir fig.I) où R1, R2, R3 et R4 correspondent à H, à un groupe carboxyle, alcoxy-carbonyle inférieur, phényle, alkyle inférieur facultativement substitué par OH, un carboxyle et un alcoxy-carbonyle inférieur, ou un cycloalkyle, ou R1 et R2 peuvent être combinés ensemble pour former un alkylène inférieur; R5 est un groupe -SR6 ou un groupe -NR7R8 dans lesquels R6 est un groupe pyridyle ou phényle portant facultativement 1 à 3 substituants choisi parmi OH et un alkyle inférieur; et R7 et R8 correspondent à H, à un groupe phényle portant facultativement 1 à 3 substituants choisi parmi OH, un alkyle, un alcoxy-carbonyle inférieur et un carboxyle, ou R7 et R8 R2 peuvent être combinés ensemble pour former avec un atome d'azote auquel ils sont liés un groupe 1-pyrrolidinyle, 2-oxo-1-pyrrolidinyle ou 1-pipérazinyle substitué par un groupe phényle facultativement substitué par un halogène ou un trihalométhyle, un hydroxy-alkyle inférieur ou un diphényl-alkyle inférieur, ou un sel de ces derniers, et un agent anti-inflammatoire contenant comme ingrédient actif un composé de la formule ci-dessus, où R1, R3 et R4 correspondent à H, R2 est un alkyle ou un cycloalkyle inférieur, R5 est un groupe -NR7R8 (R7 est H, R8 est un groupe phényle substitué par OH et deux groupes alkyle inférieur).

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