Bioorganic and Medicinal Chemistry p. 731 - 737 (1997)
Update date:2022-08-04
Topics:
Angeli
Brasili
Cingolani
Marucci
Piergentili
Pigini
Quaglia
To develop ligands that may be useful in exploring muscarinic receptor heterogeneity, we synthesized a series of analogues of 2,2-diphenyl-[1,3]-dioxolan-4-ylmethyl-dimethylamine oxalate and methiodide bearing a modified cationic head. These compounds, when tested on tissues containing the three subtypes M1, M2, and M3, behaved as muscarinic antagonists whose results showed that different substituents on the quaternary and tertiary nitrogen affect affinity and selectivity in different ways. In particular, comparison of the affinities of these ligands with those of the reference compounds points out that compounds bearing an ethyl substituent improve the affinity of the molecule at the three subtypes, while compounds bearing a phenethyl substituent are more selective for the M3 sites.
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(1997)