Synthesis and β-adrenoceptor agonist properties of (±)-1-(3',4'-dihydroxyphenoxy)-3-(3",4"-dimethoxyphenyl) ethylamino-2-propanol hydrochloride, (±)-RO363.HCl, and the (2S)-(-)-isomer
作者:Dimitri Iakovidis、Simon N.S Louis、Linda A Rezmann、Felicia Colagrande、Tracy L Nero、Graham P Jackman、William J Louis
DOI:10.1016/s0223-5234(99)80103-2
日期:1999.6
The synthesis of (+/-)-1-(3 ',4'-dihydroxyphenoxy)-3-(3",4"-dimethoxyphenyl)ethylamino-2-propanol hydrochloride, (+/-)R0363.HCl, and the (2S)-(-)-isomer is described for the first time. The binding affinities for (+/-)-R0363.HCl, (2S)-(-)-R0363.HCl and a number of well known beta-adrenoceptor agonists for transfected human beta(1)-, beta(2)-and beta(3),-adrenoceptors expressed in Chinese hamster ovary cells have been determined and compared with the functional potencies in rat atria (beta(1)) and trachea (beta(2)). The results indicate that both (+/-)-R0363 and (2S)-(-)-R0363 are selective for the human and rat beta(1)-adrenoceptors. The (2S)-(-)-isomer of R0363, as expected, has a higher binding affinity for the human and functional potency for rat beta-adrenoceptor subtypes than the racemate. However, in contrast to the catecholamines and formoterol, the functional potency of the racemic mixture and its (-)-enantiomer are not significantly different from their binding affinity, suggesting that they are examples of partial agonists with sufficient intrinsic activity to produce full agonist responses. (C) Elsevier, Paris.