Abstract：
:The synthesis of S-(-)-1-(4-(2-ethoxyethoxy)phenoxy)-2-hydroxy-3-(2-(3,4-dimethoxyphenyl)ethylamino)propane hydrochloride (D140S.HCl 6), a novel short acting beta(1)-specific adrenoceptor antagonist, has been described. The antagonist potency for D140S.HCl 6 has been compared with esmolol, another short acting agent, and other well known beta-adrenoceptor antagonists in isolated rat tissue preparations. The pharmacokinetics of D140S.HCl 6 in 7 day continuous intravenous infusions and 4 weeks intravenous bolus injection studies in conscious rats and dogs have been examined in toxicology studies. The effect on the isoprenaline-induced heart rate increase and the pharmacodynamic half-life of D140S.HCl 6 has been compared with esmolol in a conscious rat model. In addition, the results of a range of toxicological studies are presented. The results indicate that D140S.HCl 6 is a highly specific beta(1)-adrenoceptor antagonist (pA(2) = 8.15+/-0.22, beta(1)/beta(2) selectivity > 4400). The in vitro studies suggest D140S.HCl is ca. ten times more potent and 60 times more beta(1)-specific than racemic esmolol. Pharmacokinetic non-linearity was seen when given as a 7 day intravenous infusion at toxicological doses above 10 mg kg(-1) h(-1) in the rat and 2.5 mg kg(-1) h(-1) in the dog. Both D140S.HCl 6 and esmolol have very short durations of action after intravenous infusion in the rat (pharmacodynamic half-life is < 15 min for D140S.HCl and 10 min for esmolol). The toxicological tests indicate that D140S.HCl 6 shows no unexpected toxicity and none of the tissue irritancy problems reported for esmolol formulations.
journal_name
Eur J Med Chemjournal_title
European journal of medicinal chemistryauthors
Jackman GP,Iakovidis D,Nero TL,Anavekar NS,Rezmann-Vitti LA,Louis SN,Mori M,Drummer OH,Louis WJdoi
10.1016/s0223-5234(02)01399-5subject
Has Abstractpub_date
2002-09-01 00:00:00pages
731-41issue
9eissn
0223-5234issn
1768-3254pii
S0223523402013995journal_volume
37pub_type
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