Synthesis and Structure-Activity Relationships of 6-Heterocyclic-Substituted Purines as Inactivation Modifiers of Cardiac Sodium Channels
摘要:
Purine-based analogs of SDZ 211-500 (5) were prepared and evaluated as inactivation modifiers of guinea pig or human cardiac sodium (Na) channels expressed in Xenopus oocytes. Substances which remove or slow the Na channel inactivation process in cardiac tissue are anticipated to prolong the effective refractory period and increase inotropy and thus have potential utility as antiarrhythmic agents. Heterocyclic substitution at the 6-position of the purine ring resulted in compounds with increased Na activity and potency, with 5-membered heterocycles being optimal. Only minor modifications to the benzhydrylpiperazine side chain were tolerated. Selected compounds which delayed the inactivation of Na channels were found to increase refractoriness and contractility in a rabbit Langendorff heart model, consistent with the cellular mechanism. Activity in both the oocyte and rabbit heart assays was specific to the S enantiomers. Preliminary in vivo activity has been demonstrated following intravenous infusion. The most promising compound on the basis of in vitro data is the formylpyrrole (S)-74, which is 25-fold more potent than DPI 201-106 (1) in the human heart Na channel assay.
Synthesis and Structure-Activity Relationships of 6-Heterocyclic-Substituted Purines as Inactivation Modifiers of Cardiac Sodium Channels
摘要:
Purine-based analogs of SDZ 211-500 (5) were prepared and evaluated as inactivation modifiers of guinea pig or human cardiac sodium (Na) channels expressed in Xenopus oocytes. Substances which remove or slow the Na channel inactivation process in cardiac tissue are anticipated to prolong the effective refractory period and increase inotropy and thus have potential utility as antiarrhythmic agents. Heterocyclic substitution at the 6-position of the purine ring resulted in compounds with increased Na activity and potency, with 5-membered heterocycles being optimal. Only minor modifications to the benzhydrylpiperazine side chain were tolerated. Selected compounds which delayed the inactivation of Na channels were found to increase refractoriness and contractility in a rabbit Langendorff heart model, consistent with the cellular mechanism. Activity in both the oocyte and rabbit heart assays was specific to the S enantiomers. Preliminary in vivo activity has been demonstrated following intravenous infusion. The most promising compound on the basis of in vitro data is the formylpyrrole (S)-74, which is 25-fold more potent than DPI 201-106 (1) in the human heart Na channel assay.
Methods For Selective N-9 Glycosylation of Purines
申请人:Robins Morris J.
公开号:US20080207891A1
公开(公告)日:2008-08-28
A process for providing regiospecific and highly stereoselective synthesis of 9-β anomeric purine nucleoside analogs is described. The introduction of the sugar moiety on to 6-(azolyl)-substituted purine bases is performed so that highly stereoselective formation of the β anomers of only the 9 position regioisomers of the purine nucleoside analogs (either D or L enantiomers) is obtained. This regiospecific and stereoselective introduction of the sugar moiety allows the synthesis of nucleoside analogs, and in particular 2′-deoxy, 3′-deoxy, 2′-deoxy-2′-halo-arabino and 2′,3′-dideoxy-2′-halo-threo purine nucleoside analogs, in high yields without formation of the 7-positional regioisomers. Processes for providing novel 6-(azolyl)purines for the regiospecific and highly stereoselective synthesis of 9-β anomeric purine nucleoside analogs are described. The compounds are drugs or intermediates to drugs.
METHODS FOR SELECTIVE N-9 GLYCOSYLATION OF PURINES
申请人:Brigham Young University
公开号:EP1895841A2
公开(公告)日:2008-03-12
US7855285B2
申请人:——
公开号:US7855285B2
公开(公告)日:2010-12-21
[EN] METHODS FOR SELECTIVE N-9 GLYCOSYLATION OF PURINES<br/>[FR] PROCEDES DE N-9 GLYCOSYLATION SELECTIVE DE PURINES
申请人:BRIGHAM YOUNG UNIVERSITY TRANS
公开号:WO2006138396A2
公开(公告)日:2006-12-28
[EN] A process for providing regiospecific and highly stereoselective synthesis of 9-ß anomeric purine nucleoside analogs is described. The introduction of the sugar moiety on to 6-(azolyl)-substituted purine bases is performed so that highly stereoselective formation of the ß anomers of only the 9 position regioisomers of the purine nucleoside analogs (either D or L enantiomers) is obtained. This regiospecific and stereoselective introduction of the sugar moiety allows the synthesis of nucleoside analogs, and in particular 2'-deoxy, 3'-deoxy, 2'-deoxy-2'-halo-arabino and 2',3'-dideoxy-2'-halo-threo purine nucleoside analogs, in high yields without formation of the 7-positional regioisomers. Processes for providing novel 6-(azolyl)purines for the regiospecific and highly stereoselective synthesis of 9-ß anomeric purine nucleoside analogs are described. The compounds are drugs or intermediates to drugs. [FR] L'invention concerne un procédé permettant d'obtenir une synthèse régiospécifique et hautement stéréosélective d'analogues de nucléosides de purines anomériques 9-ß. L'introduction de la fraction de sucre sur des bases de purines 6-(azolyl)-substituées est effectuée de manière qu'une formation hautement stéréosélective des anomères ß d'uniquement les régiosomères en position 9 des analogues de nucléosides de purines (soit des enantiomères D ou L) soit obtenue. Cette introduction régiospécifique et stéréosélective de la fraction de sucre permet d'obtenir la synthèse des analogues de nucléosides, notamment des analogues de nucléosides de purines 2'-désoxy, 3'-désoxy, 2'-désoxy-2'-halo-arabino et 2',3'-didésoxy-2'-halo-thréo, à des rendements élevés sans formation des régiosiomères en position 7. L'invention concerne également des procédés permettant de préparer des purines 6-(azolyl) destinées à la synthèse régiospécifique et hautement stéréosélective d'analogues de nucléosides de purines anomériques 9-ß. Les composés sont des médicaments ou des intermédiaires aux médicaments.
Synthesis and Structure-Activity Relationships of 6-Heterocyclic-Substituted Purines as Inactivation Modifiers of Cardiac Sodium Channels
作者:Kimberly G. Estep、Kurt A. Josef、Edward R. Bacon、Philip M. Carabateas、Squire Rumney、Garry M. Pilling、Douglas S. Krafte、Walter A. Volberg、Kathleen Dillon、Nancy Dugrenier、G. Maurice Briggs、Paul C. Canniff、William P. Gorczyca、Gerald P. Stankus、Alan M. Ezrin
DOI:10.1021/jm00014a011
日期:1995.7
Purine-based analogs of SDZ 211-500 (5) were prepared and evaluated as inactivation modifiers of guinea pig or human cardiac sodium (Na) channels expressed in Xenopus oocytes. Substances which remove or slow the Na channel inactivation process in cardiac tissue are anticipated to prolong the effective refractory period and increase inotropy and thus have potential utility as antiarrhythmic agents. Heterocyclic substitution at the 6-position of the purine ring resulted in compounds with increased Na activity and potency, with 5-membered heterocycles being optimal. Only minor modifications to the benzhydrylpiperazine side chain were tolerated. Selected compounds which delayed the inactivation of Na channels were found to increase refractoriness and contractility in a rabbit Langendorff heart model, consistent with the cellular mechanism. Activity in both the oocyte and rabbit heart assays was specific to the S enantiomers. Preliminary in vivo activity has been demonstrated following intravenous infusion. The most promising compound on the basis of in vitro data is the formylpyrrole (S)-74, which is 25-fold more potent than DPI 201-106 (1) in the human heart Na channel assay.