A new class of irreversible muscarinic antagonists: β-haloethylamine furoates

Abstract

Abstract The synthesis of a new class of ultra-long acting muscarinic antagonists is described. Furthermore, it is noted that the stability of the, in situ, aziridinium ion is sufficiently great so that these agents can be used to study the effect of temperature upon the conformation of the muscarinic cholinoceptor. The inactivation kinetics of these receptors as well as the dissociation constants, Kd, for all probes are presented.