Exploring the 7-oxo-thiazolo[5,4-d]pyrimidine core for the design of new human adenosine A3 receptor antagonists. Synthesis, molecular modeling studies and pharmacological evaluation
摘要:
A new series of 5-methyl-thiazolo[5,4-d]pyrimidine-7-ones bearing different substituents at position 2 (aryl, heteroaryl and arylamino groups) was synthesized and evaluated in radioligand binding assays to determine their affinities at the human (h) A(1), A(2A), and A(3) adenosine receptors (ARs). Efficacy at the hA(2B) and antagonism of selected ligands at the hA(3) were also assessed through cAMP experiments. Some of the new derivatives exhibited good to high hA(3)AR affinity and selectivity versus all the other AR subtypes. Compound 2-(4-chlorophenyl)-5-methyl-thiazolo[5,4-d]pyrimidine-7-one 4 was found to be the most potent and selective ligand of the series (K-i hA(3) = 18 nM). Molecular docking studies of the reported derivatives were carried out to depict their hypothetical binding mode in our hA(3) receptor model. (C) 2015 Elsevier Masson SAS. All rights reserved.
Exploring the 7-oxo-thiazolo[5,4-d]pyrimidine core for the design of new human adenosine A3 receptor antagonists. Synthesis, molecular modeling studies and pharmacological evaluation
摘要:
A new series of 5-methyl-thiazolo[5,4-d]pyrimidine-7-ones bearing different substituents at position 2 (aryl, heteroaryl and arylamino groups) was synthesized and evaluated in radioligand binding assays to determine their affinities at the human (h) A(1), A(2A), and A(3) adenosine receptors (ARs). Efficacy at the hA(2B) and antagonism of selected ligands at the hA(3) were also assessed through cAMP experiments. Some of the new derivatives exhibited good to high hA(3)AR affinity and selectivity versus all the other AR subtypes. Compound 2-(4-chlorophenyl)-5-methyl-thiazolo[5,4-d]pyrimidine-7-one 4 was found to be the most potent and selective ligand of the series (K-i hA(3) = 18 nM). Molecular docking studies of the reported derivatives were carried out to depict their hypothetical binding mode in our hA(3) receptor model. (C) 2015 Elsevier Masson SAS. All rights reserved.
Electrochemical Synthesis of Unnatural Amino Acids via Anodic Decarboxylation of <i>N</i>-Acetylamino Malonic Acid Derivatives
作者:Olesja Koleda、Katrina Prane、Edgars Suna
DOI:10.1021/acs.orglett.3c02687
日期:2023.11.10
α-disubstituted cyclic amino acidderivatives in medicinal chemistry urges for analogue design with improved pharmacokinetic properties. Herein, we disclose an electrochemical approach toward unnatural THF- and THP-containing amino acidderivatives that relies on anodic decarboxylation-intramolecular etherification of inexpensive and readily available N-acetylamino malonicacid monoesters under Hofer–Moest
α,α-二取代环状氨基酸衍生物在药物化学中的广泛应用迫切需要具有改进的药代动力学特性的类似物设计。在此,我们公开了一种针对非天然含THF和THP的氨基酸衍生物的电化学方法,该方法依赖于廉价且容易获得的N-乙酰氨基丙二酸单酯在Hofer-Moest反应条件下的阳极脱羧-分子内醚化。脱羧环化在恒定电流条件下在未分裂的细胞中在水性介质中进行,无需添加任何碱。在组织蛋白酶 K 抑制剂 balicatib 中,用含 THP 的氨基酸支架成功生物等排取代 1-氨基环己烷-1-羧酸亚基,有助于降低亲脂性,同时保留低纳摩尔酶抑制效力和相当的微粒体稳定性。
Exploring the 7-oxo-thiazolo[5,4-d]pyrimidine core for the design of new human adenosine A3 receptor antagonists. Synthesis, molecular modeling studies and pharmacological evaluation
A new series of 5-methyl-thiazolo[5,4-d]pyrimidine-7-ones bearing different substituents at position 2 (aryl, heteroaryl and arylamino groups) was synthesized and evaluated in radioligand binding assays to determine their affinities at the human (h) A(1), A(2A), and A(3) adenosine receptors (ARs). Efficacy at the hA(2B) and antagonism of selected ligands at the hA(3) were also assessed through cAMP experiments. Some of the new derivatives exhibited good to high hA(3)AR affinity and selectivity versus all the other AR subtypes. Compound 2-(4-chlorophenyl)-5-methyl-thiazolo[5,4-d]pyrimidine-7-one 4 was found to be the most potent and selective ligand of the series (K-i hA(3) = 18 nM). Molecular docking studies of the reported derivatives were carried out to depict their hypothetical binding mode in our hA(3) receptor model. (C) 2015 Elsevier Masson SAS. All rights reserved.