Hybrid approach for the design of highly affine and selective dopamine D3 receptor ligands using privileged scaffolds of biogenic amine GPCR ligands
摘要:
A series of compounds containing privileged scaffolds of the known histamine H-1 receptor antagonists cetirizine, mianserin, ketotifen, loratadine, and bamipine were synthesized for further optimization as ligands for the related biogenic amine binding dopamine D-3 receptor. A pharmacological screening was carried out at dopamine D-2 and D-3 receptors. In the preliminary testing various ligands have shown moderate to high affinities for dopamine D-3 receptors, for example, N-(4-{4-[benzyl(phenyl)amino]piperidin-1-yl} butylnaphthalen-2-carboxamide (19a) (hD(3) K-i = 0.3 nM; hD(2) K-i = 703 nM), leading to a selectivity ratio of 2343. (C) 2007 Elsevier Ltd. All rights reserved.
Cu‐Catalyzed Desulfonylative Amination of Benzhydryl Sulfones
作者:Masakazu Nambo、Yasuyo Tahara、Jacky C.‐H. Yim、Cathleen M. Crudden
DOI:10.1002/chem.201805638
日期:2019.2.6
benzhydryl aminesfrom the reaction of readily available sulfonederivatives with amines is described. The Cu‐catalyzed desulfonylative amination not only provides structurally diverse benzhydryl amines in good yields, but is also applicable to iterative and intramolecular aminations. Control experiments suggested that the formation of a Cu‐carbene intermediate generated from the sulfone substrate,
Synthesis of 1,4-Diazacycles by Hydrogen Borrowing
作者:Anju Nalikezhathu、Adriane Tam、Valeriy Cherepakhin、Van K. Do、Travis J. Williams
DOI:10.1021/acs.orglett.3c00468
日期:2023.3.17
4-diazacycles by diol–diamine coupling, uniquely made possible with a (pyridyl)phosphine-ligated ruthenium(II) catalyst (1). The reactions can exploit either two sequential N-alkylations or an intermediate tautomerization pathway to yield piperazines and diazepanes; diazepanes are generally inaccessible by catalyticroutes. Our conditions tolerate different amines and alcohols that are relevant to key