Facile synthesis of fused 1,2,4-triazolo[1,5-c]pyrimidine derivatives as human adenosine A3 receptor ligands
摘要:
A facile synthetic method for fused triazolopyrimidine derivatives having high affinity and selectivity for human adenosine A(3) receptors is reported. The fused triazolopyrimidine derivatives were easily prepared by one-pot reaction using acylhydrazines and imidates prepared from amine derivatives bearing cyano group and orthoesters in situ. This synthetic method was useful in finding new tricyclic adenosine A3 receptor antagonists and also in diversifying the substituents at two positions on the fused triazolopyrimidine ring. (C) 2004 Elsevier Ltd. All rights reserved.
Triazoloquinazoline and pyrazolotriazolopyrimidine derivatives, medicinal compositions, adenosine a3 receptor affinity agents, ocular tension lowering agents, preparations for preventing and treating glaucoma and method of lowering ocular tension
申请人:——
公开号:US20040142952A1
公开(公告)日:2004-07-22
The present invention provides triazoloquinazoline and pyrazolotriazolopyrimidine derivatives represented by the following general formula (1):
1
wherein R
1
and R
2
represent the same groups as those described in the description; and A represents a pyrazole or benzene ring which is optionally substituted with the groups described in the description. These derivatives exhibit an affinity to an adenosine A3 receptor and also have an intraocular-pressure reducing effect, and are useful for prevention or treatment of glaucoma.
TRIAZOLOQUINAZOLINE AND PYRAZOLOTRIAZOLOPYRIMIDINE DERIVATIVES, MEDICINAL COMPOSITIONS, ADENOSINE A3 RECEPTOR AFFINITY AGENTS, OCULAR TENSION LOWERING AGENTS, PREPARATIONS FOR PREVENTING AND TREATING GLAUCOMA AND METHOD OF LOWERING OCULAR TENSION
申请人:OTSUKA PHARMACEUTICAL FACTORY, INC.
公开号:EP1364953A1
公开(公告)日:2003-11-26
The present invention provides triazoloquinazoline and pyrazolotriazolopyrimidine derivatives represented by the following general formula (1):
wherein R1 and R2 represent the same groups as those described in the description; and A represents a pyrazole or benzene ring which is optionally substituted with the groups described in the description. These derivatives exhibit an affinity to an adenosine A3 receptor and also have an intraocular-pressure reducing effect, and are useful for prevention or treatment of glaucoma.
A facile synthetic method for fused triazolopyrimidine derivatives having high affinity and selectivity for human adenosine A(3) receptors is reported. The fused triazolopyrimidine derivatives were easily prepared by one-pot reaction using acylhydrazines and imidates prepared from amine derivatives bearing cyano group and orthoesters in situ. This synthetic method was useful in finding new tricyclic adenosine A3 receptor antagonists and also in diversifying the substituents at two positions on the fused triazolopyrimidine ring. (C) 2004 Elsevier Ltd. All rights reserved.