Design, synthesis and binding at cloned muscarinic receptors of N -[5-(1′-substituted-acetoxymethyl)-3-oxadiazolyl] and N -[4-(1′-substituted-acetoxymethyl)-2-dioxolanyl] dialkyl amines
摘要:
Few muscarinic antagonists differentiate between the M-4 and M-2 muscarinic receptors. In a structure-activity study, aimed at discovering leads for the development of a M-4 muscarinic receptor-selective antagonist, we have synthesized and tested at cloned muscarinic receptors the binding of a group of dioxolane- or oxadiazole-dialkyl amines, and compared them to our compound 1, which contains the furan nucleus. Although none of these agents were particularly potent at M-4 receptors (K-d values were typically 30-70 nM), furan derivatives (-)1 and (+)1 were significantly more potent at M-4 receptors than at M-2 receptors (similar to 3- and 4-fold, respectively). The dioxolane derivatives 12b and 12c were more than 10-fold selective for the M-4 versus the M-2 receptors, while the dioxolane derivative 12e was 15-fold more potent at M-4 receptors than for M-2 receptors. However, these agents bound to M-3 receptors with potencies like that for the M-4 receptor, so they are not M-4-selective. The M-4/M-2 relative selectivities of some of our compounds are similar to the better hexahydrosiladifenidol derivatives, and may provide some important structural clues for the development of potent and selective M-4 antagonists. (C) 2000 Elsevier Science Ltd. Ail rights reserved.
Design, synthesis and binding at cloned muscarinic receptors of N -[5-(1′-substituted-acetoxymethyl)-3-oxadiazolyl] and N -[4-(1′-substituted-acetoxymethyl)-2-dioxolanyl] dialkyl amines
摘要:
Few muscarinic antagonists differentiate between the M-4 and M-2 muscarinic receptors. In a structure-activity study, aimed at discovering leads for the development of a M-4 muscarinic receptor-selective antagonist, we have synthesized and tested at cloned muscarinic receptors the binding of a group of dioxolane- or oxadiazole-dialkyl amines, and compared them to our compound 1, which contains the furan nucleus. Although none of these agents were particularly potent at M-4 receptors (K-d values were typically 30-70 nM), furan derivatives (-)1 and (+)1 were significantly more potent at M-4 receptors than at M-2 receptors (similar to 3- and 4-fold, respectively). The dioxolane derivatives 12b and 12c were more than 10-fold selective for the M-4 versus the M-2 receptors, while the dioxolane derivative 12e was 15-fold more potent at M-4 receptors than for M-2 receptors. However, these agents bound to M-3 receptors with potencies like that for the M-4 receptor, so they are not M-4-selective. The M-4/M-2 relative selectivities of some of our compounds are similar to the better hexahydrosiladifenidol derivatives, and may provide some important structural clues for the development of potent and selective M-4 antagonists. (C) 2000 Elsevier Science Ltd. Ail rights reserved.
Design, synthesis and binding at cloned muscarinic receptors of N -[5-(1′-substituted-acetoxymethyl)-3-oxadiazolyl] and N -[4-(1′-substituted-acetoxymethyl)-2-dioxolanyl] dialkyl amines
Few muscarinic antagonists differentiate between the M-4 and M-2 muscarinic receptors. In a structure-activity study, aimed at discovering leads for the development of a M-4 muscarinic receptor-selective antagonist, we have synthesized and tested at cloned muscarinic receptors the binding of a group of dioxolane- or oxadiazole-dialkyl amines, and compared them to our compound 1, which contains the furan nucleus. Although none of these agents were particularly potent at M-4 receptors (K-d values were typically 30-70 nM), furan derivatives (-)1 and (+)1 were significantly more potent at M-4 receptors than at M-2 receptors (similar to 3- and 4-fold, respectively). The dioxolane derivatives 12b and 12c were more than 10-fold selective for the M-4 versus the M-2 receptors, while the dioxolane derivative 12e was 15-fold more potent at M-4 receptors than for M-2 receptors. However, these agents bound to M-3 receptors with potencies like that for the M-4 receptor, so they are not M-4-selective. The M-4/M-2 relative selectivities of some of our compounds are similar to the better hexahydrosiladifenidol derivatives, and may provide some important structural clues for the development of potent and selective M-4 antagonists. (C) 2000 Elsevier Science Ltd. Ail rights reserved.