Novel quinuclidine-based ligands for the muscarinic cholinergic receptor
作者:John Saunders、Mark Cassidy、Stephen B. Freedman、Elizabeth A. Harley、Leslie L. Iversen、Clare Kneen、Angus M. MacLeod、Kevin J. Merchant、Roger J. Snow、Raymond Baker
DOI:10.1021/jm00166a008
日期:1990.4
been discovered that an oxadiazole ring and related heterocycles can function as bioisosteric replacements for the ester moiety found in several known muscarinic ligands. Within this series there exist compounds which span the efficacy range from high-efficacy agonist through partial agonists to antagonists with affinity comparable or superior to that of classical quaternary ammonium ligands. Consistent
Azabicyclic compounds, process for their preparation and pharmaceutical compositions containing them
申请人:BEECHAM GROUP PLC
公开号:EP0322182A2
公开(公告)日:1989-06-28
Novel compounds of formula (I), processes for their preparation, and their use as pharmaceutical agents are described:
in which p represents an integer of 2 to 4; r represents an integer of 1 or 2; s represents 0 or 1; and X represents a group
in which A₁ is oxygen or sulphur, one of A₂ and A₃ is CR₁ and the other is nitrogen or CR₂, or A₂ is oxygen or sulphur, A₁ is CH and A₃ is CR₁, where R₁ and R₂ are independently selected from hydrogen and C₁₋₂ alkyl, with the proviso that when r is 2, R₁ and R₂ are hydrogen or methyl.
3-Heteroaryl-Substituted Quinuclidin-3-ol and Quinuclidin-2-ene Derivatives as Muscarinic Antagonists. Synthesis and Structure-Activity Relationships
作者:Bjoern M. Nilsson、Staffan Sundquist、Gary Johansson、Gunnar Nordvall、Gunilla Glas、Lisbeth Nilvebrant、Uli Hacksell
DOI:10.1021/jm00003a011
日期:1995.2
and 16-25) had lower binding affinities for the different muscarinic receptor subtypes than the corresponding quinuclidin-2-ene analogues when examined in the various tissue homogenates. In general, the new compounds showed low subtype selectivity. The structure-affinity relationships are discussed in terms of differences in proton basicity of the azabicyclic nitrogen and differences in geometric, conformational