Structure-activity relationships in a series of bisquaternary bisphthalimidine derivatives modulating the muscarinic M(2)-receptor allosterically.
Hexane-bisammonium-type compounds containing lateral phthalimide moieties are well-established ligands of the common allosteric binding site of muscarinic M(2) receptors. Previous structure-activity relationships (SAR) revealed two positively charged centers and two lateral phthalimide moieties in a defined arrangement to be essential of a high allosteric potency. The purpose of this study was to replace one carbonyl group of the phthalimides with hydrogens, hydroxy, alkoxy, phenyl, benzyl, and benzylidene groups in order to check the influence of these substituents on the allosteric activity in antagonist-linked receptors. The analysis of the quantitative SAR indicated that a high allosteric potency is related to a certain amount of rigidity as well as polarizibility and the ability to form hydrophobic interactions.
Botero Cid
H M
HM
Pharmaceutical Chemistry, Institute of Pharmacy, University of Würzburg.
Tränkle
C
C
Baumann
K
K
Pick
R
R
Mies-Klomfass
E
E
Kostenis
E
E
Mohr
K
K
Holzgrabe
U
U
D000494:Allosteric Regulation; D000818:Animals; D008958:Models, Molecular; D008968:Molecular Conformation; D018727:Muscarinic Antagonists / Q000138:chemical synthesis* / Q000737:chemistry / Q000494:pharmacology; D009206:Myocardium / Q000378:metabolism; D010797:Phthalimides / Q000138:chemical synthesis* / Q000737:chemistry / Q000494:pharmacology; D043585:Receptor, Muscarinic M2; D011976:Receptors, Muscarinic / Q000187:drug effects / Q000378:metabolism*; D013329:Structure-Activity Relationship; D013552:Swine
D018727:Muscarinic Antagonists; D010797:Phthalimides; D043585:Receptor, Muscarinic M2; D011976:Receptors, Muscarinic