Structure–activity studies of 5-substituted pyridopyrimidines as adenosine kinase inhibitors
摘要:
The synthesis and SAR of a novel series of non-nucleoside pyridopyrimidine inhibitors of the enzyme adenosine kinase (AK) are described. It was found that pyridopyrimidines with a broad range of medium and large non-polar substituents at the 5-position potently inhibited AK activity. A narrower range of analogues was capable of potently inhibiting adenosine phosphorylation in intact cells indicating an enhanced ability of these analogues to penetrate cell membranes. Potent AK inhibitors were found to effectively reduce nociception in animal models of thermal hyperalgesia and persistent pain. (C) 2000 Elsevier Science Ltd. All rights reserved.
作者:Qian Wan、Shiwu Li、Qiang Kang、Yaofeng Yuan、Yu Du
DOI:10.1021/acs.joc.9b02243
日期:2019.12.6
An enantioselective three-component cascade reduction-Michael additionreaction catalyzed by chiral-at-metal Rh(III) complexes has been developed. With a Hantzsch ester as the hydride source, a number of malononitrile derivatives were prepared in good yields and excellent enantioselectivities. A model that accounts for the origin and influence factors of the stereoselectivity has been proposed based
Zinc-Catalyzed β-Functionalization of Cyclopropanols via Enolized Homoenolate
作者:Yoshiya Sekiguchi、Naohiko Yoshikai
DOI:10.1021/jacs.1c10109
日期:2021.11.10
involves zinc homoenolate and its enolization to generate a key bis-nucleophilic species. α-Allylation of this “enolized homoenolate” with MBH carbonate would be followed by regeneration of the cyclopropane ring and irreversible lactonization. The enolized homoenolate mechanism has also been proven to allow for β-functionalization with alkylidenemalononitrile as the reaction partner. A sequence of the present
QuadrupleFunctionalization: A one-pot regioselective [3+2] cycloaddition platform of fluorinatednitrileimines with dicyanoalkenes was established to produce a broad variety of fully substituted N1-aryl 3-di/trifluoromethyl-4/5-cyanopyrazole pharmacophores.
Expedient radical phosphonylations <i>via</i> ligand to metal charge transfer on bismuth
作者:Jatin Patra、Akshay M. Nair、Chandra M. R. Volla
DOI:10.1039/d4sc00692e
日期:——
bismuth LMCT catalysis for the generation of heteroatom centered radicals, we hereby report an efficient radical phosphonylation using BiCl3 as the LMCT catalyst. Phosphonyl radicals generated viavisible-lightinduced LMCT of BiCl3 were subjected to a variety of transformations like alkylation, amination, alkynylation and cascade cyclizations. The catalytic system tolerated a wide range of substrate classes