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.
Transformation of 3-(Furan-2-yl)-1,3-di(het)arylpropan-1-ones to Prop-2-en-1-ones via Oxidative Furan Dearomatization/2-Ene-1,4,7-triones Cyclization
作者:Roman O. Shcherbakov、Diana A. Eshmemet’eva、Anton A. Merkushev、Igor V. Trushkov、Maxim G. Uchuskin
DOI:10.3390/molecules26092637
日期:——
3-(furan-2-yl)-1,3-di(het)arylpropan-1-ones followed by an unusual cyclization of the formed di(het)aryl-substituted 2-ene-1,4,7-triones has been developed. The cyclization step is related to the Paal–Knorr synthesis, but the furan ring formation is accompanied in this case by a formal shift of the double bond through the formation of a fullyconjugated 4,7-hydroxy-2,4,6-trien-1-one system or its surrogate.
A 100 % atom‐efficient synthesis of ketones from electron‐deficient internalolefins was achieved using O2 as a “green” oxidant (see scheme, DMA=N,N‐dimethylacetamide, EWG=electron‐withdrawing group). Various electron‐deficient olefins were oxidized to the corresponding ketones with over 99 % selectivity and without the formation of olefin isomers or their oxidized products.
InBr<sub>3</sub>-Catalyzed Alkynylation and Allylation of Acid Chlorides: A Facile Synthesis of Alkynyl and Allyl Ketones
作者:J. S. Yadav、B. V. Reddy、M. Sridhar Reddy、G. Parimala
DOI:10.1055/s-2003-42438
日期:——
Alkynylsilanes and allyltrimethylsilane undergo smooth coupling with acid chlorides in the presence of 5 mol% of indium tribromide under mild conditions to afford the corresponding α,β-acetylenic ketones and β,γ-unsaturated ketones in excellent yields in a short reaction time with high selectivity.
Metal‐bound water molecules have recently been recognized as a new facet of soft Lewis acid catalysis. Herein, a chiral palladium aqua complex was constructed that enables carbon–hydrogen bonds of indoles to be functionalized efficiently. We embraced a chiral 2,2′‐bipyridine as both ligand and hydrogen‐bond donor to configure a robust, yet highly Lewis acidic, chiral aqua complex in water. Whereas the
Metal‐Organic Layers Catalyze Photoreactions without Pore Size and Diffusion Limitations
作者:Ruoyu Xu、Tasha Drake、Guangxu Lan、Wenbin Lin
DOI:10.1002/chem.201803635
日期:2018.10.22
limitation and slow diffusion, which are detrimental for photoreactions. Metal‐organic layers (MOLs) have unique ultrathin 2D monolayer structures and overcome pore size and diffusion limitations. Here, the synthesis of photoactive Zr‐RuBPY MOL based on Zr‐oxo clusters and [Ru(bpy)3]2+‐containing linkers is reported as well as its application in photocatalytic [2+2] cyclizations of enones and Meerwein