Rational Design, Synthesis, and Structure−Activity Relationships of Aryltriazoles as Novel Corticotropin-Releasing Factor-1 Receptor Antagonists
摘要:
Following the discovery of the very high binding affinity of 4-anilinopyrimidines against corticotropin-releasing factor receptor-1 (CRF1) (e.g., 1, K-i = 2 nM), a new series of triazoles bearing different groups has been synthesized and evaluated. The compounds were prepared by cyclizations of N-acyl-S-methylisothioureas with alkylhydrazines or by cyclizations with hydrazine followed by alkylation. While members of this series showed potent binding affinity against CRF1 receptor, there were important differences between the different regio- (7 and 12) and stereoisomeric aryltriazoles where the R-1 or R-2 side chain in 7 has an asymmetric center. In terms of overall potency, aryltriazole analogues such as 7r bearing an N-(alpha-branched benzyl)-N-propylamino side chain were the most potent, followed by analogues such as 7a, with an N-bis(cyclopropyl)methyl-N-propylamino side chain, and analogues such as 7m, with an N-(alpha-branched aliphatic)-N-propylamino side chain. While the N-propyl group was crucial for high potency, we hypothesized that the terminal methyl mimicked the 5-methyl of pyrazolo[1,5-alpha]pyrimidines 3 and 4. Correlation of the low-energy conformers of compounds of type 3 and 7 generated by computational analyses was very good. The size and shape of the N-alkyl group dramatically changed the potency of the triazoles, which is in contrast to the SAR seen for bicyclic CRF1 antagonists. In general, the S-enantiomer was much more potent than the corresponding R-isomer. Furthermore, to a limited extent in the aryltriazole series the substituent on the 5-phenyl ring changed the potency up to 9-fold. (S)-1-Methyl-3-[N-(4-fluorophenylpentyl)-N-propyl]amino-5-(2-methoxy-4-dichlorophenyl)-1H-[1,2,4]triazole [(S)-7r] showed very potent binding affinity (K-i = 2.7 nM) to CRF1 receptors with an IC50 of 49 nM in a cAMP inhibition assay.
Rational Design, Synthesis, and Structure−Activity Relationships of Aryltriazoles as Novel Corticotropin-Releasing Factor-1 Receptor Antagonists
摘要:
Following the discovery of the very high binding affinity of 4-anilinopyrimidines against corticotropin-releasing factor receptor-1 (CRF1) (e.g., 1, K-i = 2 nM), a new series of triazoles bearing different groups has been synthesized and evaluated. The compounds were prepared by cyclizations of N-acyl-S-methylisothioureas with alkylhydrazines or by cyclizations with hydrazine followed by alkylation. While members of this series showed potent binding affinity against CRF1 receptor, there were important differences between the different regio- (7 and 12) and stereoisomeric aryltriazoles where the R-1 or R-2 side chain in 7 has an asymmetric center. In terms of overall potency, aryltriazole analogues such as 7r bearing an N-(alpha-branched benzyl)-N-propylamino side chain were the most potent, followed by analogues such as 7a, with an N-bis(cyclopropyl)methyl-N-propylamino side chain, and analogues such as 7m, with an N-(alpha-branched aliphatic)-N-propylamino side chain. While the N-propyl group was crucial for high potency, we hypothesized that the terminal methyl mimicked the 5-methyl of pyrazolo[1,5-alpha]pyrimidines 3 and 4. Correlation of the low-energy conformers of compounds of type 3 and 7 generated by computational analyses was very good. The size and shape of the N-alkyl group dramatically changed the potency of the triazoles, which is in contrast to the SAR seen for bicyclic CRF1 antagonists. In general, the S-enantiomer was much more potent than the corresponding R-isomer. Furthermore, to a limited extent in the aryltriazole series the substituent on the 5-phenyl ring changed the potency up to 9-fold. (S)-1-Methyl-3-[N-(4-fluorophenylpentyl)-N-propyl]amino-5-(2-methoxy-4-dichlorophenyl)-1H-[1,2,4]triazole [(S)-7r] showed very potent binding affinity (K-i = 2.7 nM) to CRF1 receptors with an IC50 of 49 nM in a cAMP inhibition assay.
Novel branched substituted amino derivatives of 3-amino-1-phenyl-1h-[1,2,4] triazol, methods for producing them and pharmaceutical compositions containing them
申请人:——
公开号:US20030162771A1
公开(公告)日:2003-08-28
The present invention relates to compounds of formula:
1
in which in particular
R
1
, R
2
and R
3
represent, each independently of one another, hydrogen; a halogen atom; a (C
1
-C
5
)alkyl; a (C
1
-C
5
)alkoxy; a trifluoromethyl or an S-R group in which R represents a (C
1
-C
5
)alkyl;
R
4
and R
5
represents a (C
1
-C
5
)alkyl; an alkynyl with 3 to 5 carbon atoms; a (C
3
-C
5
)cycloalkyl or an R
a
—X—(C
1
-C
2
)alkyl group in which R
a
represents a (C
1
-C
3
)alkyl and X represents O;
R
6
represents —CHR
7
R
8
, in which R
7
represents a phenyl group which can be substituted in the 3-, 4- and 5-positions by one or more Z′ radicals, with Z′ representing a halogen; a (C
1
-C
5
)alkyl; a (C
1
-C
5
)alkyl—X— or (C
1
-C
3
)alkyl—X—(C
1
-C
2
)alkyl where X represents O; or a methylenedioxy group; and R
8
represents a (C
1
-C
6
)alkyl; a (C
3
-C
5
)cycloalkyl(C
1
-C
3
)alkyl; or a (C
1
-C
3
)alkyl—X—(C
1
-C
3
)alkyl where X represents O.
These compounds have an affinity for CRF receptors.
Huet,J., Bulletin de la Societe Chimique de France, 1964, p. 952 - 960
作者:Huet,J.
DOI:——
日期:——
NOUVEAUX DERIVES AMINO SUBSTITUES RAMIFIES DU 3-AMINO-1-PHENYL-1H[1,2,4]TRIAZOLE, PROCEDES POUR LEUR PREPARATION ET COMPOSITIONS PHARMACEUTIQUES LES CONTENANT
申请人:SANOFI-SYNTHELABO
公开号:EP1242389A2
公开(公告)日:2002-09-25
US6806282B2
申请人:——
公开号:US6806282B2
公开(公告)日:2004-10-19
[EN] NOVEL BRANCHED SUBSTITUTED AMINO DERIVATIVES OF 3-AMINO-1-PHENYL-H[1,2,4]TRIAZOL, METHODS FOR PRODUCING THEM AND PHARMACEUTICAL COMPOSITIONS CONTAINING THEM<br/>[FR] NOUVEAUX DERIVES AMINO SUBSTITUES RAMIFIES DU 3-AMINO-1-PHENYL-H[1,2 4]TRIAZOLE, PROCEDES POUR LEUR PREPARATION ET COMPOSITIONS PHARMACEUTIQUES LES CONTENANT
申请人:SANOFI SYNTHELABO
公开号:WO2001044207A2
公开(公告)日:2001-06-21
La présente invention concerne des composés de formule (I), dans laquelle notamment R1, R2, R3 représentent, chacun indépendamment l'un de l'autre, l'hydrogène, un atome d'halogène; un (C1-C5)alkyle; un (C1-C5)alcoxy; un trifluorométhyle ou un groupe S-R dans lequel R représente un (C1-C5)alkyle; R4, R5 représente un (C1-C5)alkyle; un alcynyle de 3 à 5 atomes de carbone; un (C3-C5)cycloalkyl ou un groupe Ra-X-(C1-C2)alkyle dans lequel Ra représente un (C1-C3)alkyle et X représente O; R6 représente -CHR7R8 dans lequel R7 représente un groupe phényle pouvant être substitué en position 3, 4 et 5 par un ou plusieurs radicaux Z', avec Z' représentant un halogène; un (C1-C5)alkyle; un (C1-C5)alkyl-X- ou (C1-C3)alkyl-X-(C1-C2)alkyle où X représente O; ou un groupe méthylènedioxy; et R8 représente un (C1-C6)alkyle; un (C3-C5)cycloalkyl(C1-C3)alkyle; (C1-C3)alkyl-X-(C1-C3)alkyle où X représente O. Ces composés sont affins pour les récepteurs du CRF.