Novel Acetylcholine and Carbamoylcholine Analogues: Development of a Functionally Selective α4β2 Nicotinic Acetylcholine Receptor Agonist
摘要:
A series of carbamoylcholine and acetylcholine analogues were synthesized and characterized pharmacologically at neuronal nicotinic acetylcholine receptors (nAChRs). Several of the compounds displayed low nanomolar binding affinities to the alpha(4)beta(2) nAChR and pronounced selectivity for this subtype over alpha(3)beta(4), alpha(4)beta(4), and alpha(7) nAChRs. The high nAChR activity of carbamoylcholine analogue 5d was found to reside in its R-enantiomer, a characteristic most likely true for all other compounds in the series. Interestingly, the pronounced alpha(4)beta(2) selectivities exhibited by some of the compounds in the binding assays translated into functional selectivity. Compound 5a was a fairly potent partial alpha(4)beta(2) nAChR agonist with negligible activities at the alpha(3)beta(4) and alpha(7) subtypes, thus being one of the few truly functionally selective alpha(4)beta(2) nAChR agonists published to date. Ligand-protein docking experiments using homology models of the amino-terminal domains of alpha(4)beta(2) and alpha(3)beta(4) nAChRs identified residues Val 111(beta(2))/Ile 113(beta(4)), Phe 119(beta(2))/Gln 121(beta(4)), and Thr155(alpha(4))/Ser 150(alpha(3)) as possible key determinants of the alpha(4)beta(2)/alpha(3)beta(4)-selectivity displayed by the analogues. 4
Novel Acetylcholine and Carbamoylcholine Analogues: Development of a Functionally Selective α4β2 Nicotinic Acetylcholine Receptor Agonist
摘要:
A series of carbamoylcholine and acetylcholine analogues were synthesized and characterized pharmacologically at neuronal nicotinic acetylcholine receptors (nAChRs). Several of the compounds displayed low nanomolar binding affinities to the alpha(4)beta(2) nAChR and pronounced selectivity for this subtype over alpha(3)beta(4), alpha(4)beta(4), and alpha(7) nAChRs. The high nAChR activity of carbamoylcholine analogue 5d was found to reside in its R-enantiomer, a characteristic most likely true for all other compounds in the series. Interestingly, the pronounced alpha(4)beta(2) selectivities exhibited by some of the compounds in the binding assays translated into functional selectivity. Compound 5a was a fairly potent partial alpha(4)beta(2) nAChR agonist with negligible activities at the alpha(3)beta(4) and alpha(7) subtypes, thus being one of the few truly functionally selective alpha(4)beta(2) nAChR agonists published to date. Ligand-protein docking experiments using homology models of the amino-terminal domains of alpha(4)beta(2) and alpha(3)beta(4) nAChRs identified residues Val 111(beta(2))/Ile 113(beta(4)), Phe 119(beta(2))/Gln 121(beta(4)), and Thr155(alpha(4))/Ser 150(alpha(3)) as possible key determinants of the alpha(4)beta(2)/alpha(3)beta(4)-selectivity displayed by the analogues. 4
A cobalt-catalyzed decarboxylative methylation of aliphatic redox-active esters [N-(acyloxy)phthalimides; RAEs] with trimethylaluminum under mild conditions was developed, providing a method for transforming a carboxylate group into a methyl group without redox fluctuation. Primary and secondary RAEs were both amenable substrates, whereas a tertiary RAE delivered an elimination product. Triethylaluminum
脂肪族氧化还原活性酯 [N-(酰氧基)邻苯二甲酰亚胺;RAEs] 与三甲基铝在温和条件下的开发,提供了一种将羧酸盐基团转化为甲基基团而没有氧化还原波动的方法。一级和二级 RAE 都是适合的底物,而三级 RAE 提供消除产物。三乙基铝也用于提供脱羧乙基化产物。
Direct Alkylation of 1-Azabicyclo[1.1.0]butanes
作者:Ryan Gianatassio、Dora Kadish
DOI:10.1021/acs.orglett.9b00321
日期:2019.4.5
functionalized azetidines has been an ongoing challenge. Here, we report a general method to directly alkylate 1-azabicyclo[1.1.0]butane (ABB) with organometal reagents in the presence of Cu(OTf)2 to rapidly prepare bis-functionalized azetidines. This method allows for the preparation of azetidines bearing alkyl, allyl, vinyl, and benzyl groups. This catalyst system was extended to aziridines and spirocycles
[EN] BET BROMODOMAIN INHIBITORS AND THERAPEUTIC METHODS USING THE SAME<br/>[FR] INHIBITEURS DE BROMODOMAINES BET ET MÉTHODES THÉRAPEUTIQUES LES UTILISANT
申请人:UNIV MICHIGAN
公开号:WO2014164596A1
公开(公告)日:2014-10-09
Inhibitors of BET bromodomains and compositions containing the same are disclosed. Methods of using the BET bromodomain inhibitors in the treatment of diseases and conditions wherein inhibition of BET bromodomain provides a benefit, like cancers, also are disclosed.