Design and synthesis of novel imidazoline derivatives with potent antihyperglycemic activity in a rat model of type 2 diabetes
摘要:
Imidazoline derivatives have been reported to show anti hyperglycemic activity in vivo. In the present study, we first showed that there was no correlation between the in vivo antidiabetic activity and the in vitro affinities for the I-1/I-2 binding sites for several substituted daryl imidazolines. Among these compounds, 2-(alpha-cyclohexyl-benzyl)-4,5-dihydro-1H-imidazole 2 exhibited potent antihyperglycemic properties. It was then chosen as lead compound. Thirty-six new derivatives were synthesized by replacing the cyclohexyl/benzyl group by various cyclic systems or the imidazoline ring by isosteric heterocycles. These compounds were evaluated in vivo for their antihyperglycemic activity using an oral glucose tolerance test (OGTT) in a rat model of type-2 diabetes obtained by giving a single intravenous (iv) injection of a low dose of streptozotocin to rats (STZ rats) and in normal rats. Nine compounds with an imidazoline moiety, possibly substituted by a methyl group, had a potent effect on the glucose tolerance in normal or STZ-diabetic rats, after an oral (po) administration of the test compound at a dose of 30 or 10 mg kg(-1) without any hypoglycemia. Replacement of the imidazoline ring by isosteric heterocycles resulted in a total loss of activity. (c) 2006 Elsevier Ltd. All rights reserved.
Compounds of formula (I):
1
wherein:
R
1
represents an optionally substituted heteroaryl group,
R
2
represents an optionally substituted cycloalkyl group,
R
3
represents a hydrogen atom or an alkyl group, and
R
4
and R
5
are as defined in the description, and
Medicinal products containing the same are useful in the treatment of non-insulin-dependent type II diabetes, obesity, type I diabetes, hyperlipidaemia, hypercholesterolaemia and cardiovascular complications thereof.
Dérivés de l'imidazoline, leur procédé de préparation et les compositions pharmaceutiques qui les contiennent
申请人:LES LABORATOIRES SERVIER
公开号:EP1413579A1
公开(公告)日:2004-04-28
Composés de formule (I) :
dans laquelle :
R1 représente un groupement hétéroaryle éventuellement substitué,
R2 représente un groupement cycloalkyle éventuellement substitué,
R3 représente un atome d'hydrogène ou un groupement alkyle,
R4 et R5sont tels que définis dans la description,
leurs énantiomères, diastéréoisomères, tautomères, ainsi que leurs sels d'addition à un acide ou à une base pharmaceutiquement acceptable.
Design and synthesis of novel imidazoline derivatives with potent antihyperglycemic activity in a rat model of type 2 diabetes
作者:Louis Crane、Maria Anastassiadou、Salomé El Hage、Jean Luc Stigliani、Geneviève Baziard-Mouysset、Marc Payard、Jean Michel Leger、Jean-Guy Bizot-Espiard、Alain Ktorza、Daniel-Henri Caignard、Pierre Renard
DOI:10.1016/j.bmc.2006.07.026
日期:2006.11
Imidazoline derivatives have been reported to show anti hyperglycemic activity in vivo. In the present study, we first showed that there was no correlation between the in vivo antidiabetic activity and the in vitro affinities for the I-1/I-2 binding sites for several substituted daryl imidazolines. Among these compounds, 2-(alpha-cyclohexyl-benzyl)-4,5-dihydro-1H-imidazole 2 exhibited potent antihyperglycemic properties. It was then chosen as lead compound. Thirty-six new derivatives were synthesized by replacing the cyclohexyl/benzyl group by various cyclic systems or the imidazoline ring by isosteric heterocycles. These compounds were evaluated in vivo for their antihyperglycemic activity using an oral glucose tolerance test (OGTT) in a rat model of type-2 diabetes obtained by giving a single intravenous (iv) injection of a low dose of streptozotocin to rats (STZ rats) and in normal rats. Nine compounds with an imidazoline moiety, possibly substituted by a methyl group, had a potent effect on the glucose tolerance in normal or STZ-diabetic rats, after an oral (po) administration of the test compound at a dose of 30 or 10 mg kg(-1) without any hypoglycemia. Replacement of the imidazoline ring by isosteric heterocycles resulted in a total loss of activity. (c) 2006 Elsevier Ltd. All rights reserved.