Novel potent and m2-selective antimuscarinic compounds which penetrate the blood-brain barrier
作者:VI Cohen、B Jin、MS Gitler、RA de la Cruz、SF Boulay、VK Sood、BR Zeeberg、RC Reba
DOI:10.1016/0223-5234(96)88210-9
日期:1995.1
A series of 5-[[[(dialkylamino)alkyl]-1-phenyl]acetyl]-10,11-dihydro-5H-dibenzo[b,e][1,4]diazepin-11-ones 1 were prepared as potential m(2)-selective ligands. The binding affinities and selectivities of these compounds for the muscarinic cholinergic receptor subtypes were determined. The best m(2)-selective antimuscarinic agent studied was 5-[[4-[4-(diisobutylamino)butyl]-1-phenyl]acetyl]-10,11-dihydro-5H-dibenzo[ 1h (DIBD), which caused a significant reduction in (R,R)-3-quinuclidinyl-[I-125] -4-iodobenzilate ((R,R)-[I-125]-4IQNB) binding in brain regions known to contain a high percentage of m(2)-receptors. Thus DIED penetrates the blood-brain barrier and exhibits in vivo selectivity for the m, subtype. In contrast, neither DIBA,AF-DX 116, nor AQ-RA 741 caused a significant m(2)-selective reduction in (R,R)-[I-125]-4IQNB binding in the brain regions studied.