4-Amino-5-aryl-6-arylethynylpyrimidines: Structure–activity relationships of non-nucleoside adenosine kinase inhibitors
摘要:
A series of non-nucleoside adenosine kinase (AK) inhibitors is reported. These inhibitors originated from the modification of 5-(3-bromophenyl)-7-(6-morpholin-4-ylpyridin-3-yl)pyrido[2,3-d]pyrimidin-4-ylamine (ABT-702). The identification of a linker that would approximate the spatial arrangement found between the pyrimidine ring and the aryl group at C(7) in ABT702 was a key element in this modification. A search of potential linkers led to the discovery of an acetylene moiety as a suitable scaffold. It was hypothesized that the aryl acetylenes, ABT-702, and adenosine bound to the active site of AK (closed form) in a similar manner with respect to the orientation of the heterocyclic base. Although potent acetylene analogs were discovered based on this assumption, an X-ray crystal structure of 5-(4-dimethylaminophenyl)-6-(6-morpholin-4-yipyridin-3-ylethynyl)pyrimidin-4-ylamine (16a) revealed a binding orientation contrary to adenosine. In addition, this compound bound tightly to a unique open conformation of AK. The structure-activity relationships and unique ligand orientation and protein conformation are discussed. (c) 2006 Elsevier Ltd. All rights reserved.
We have developed a high-efficiency and practical Cu-catalyzed cross-coupling to directly construct versatile α-aryl-esters by utilizing readily available aryl bromides (or chlorides) and malonates. These gram-scale approaches occur with turnovers of up to 1560 and are smoothly conducted by the usage of a low catalyst loading, a new available ligand, and a green solvent. A variety of functional groups
Coupling of Reformatsky Reagents with Aryl Chlorides Enabled by Ylide‐Functionalized Phosphine Ligands
作者:Zhiyong Hu、Xiao‐Jing Wei、Jens Handelmann、Ann‐Katrin Seitz、Ilja Rodstein、Viktoria H. Gessner、Lukas J. Gooßen
DOI:10.1002/anie.202016048
日期:2021.3.15
organozinc reagents with aryl electrophiles using a cyclohexyl‐YPhos ligand bearing an ortho‐tolyl‐substituent in the backbone. This highly electron‐rich, bulky ligand enables the use of arylchlorides in room temperature couplings of Reformatsky reagents. The reaction scope covers diversely functionalized arylacetic and arylpropionic acid derivatives. Aryl bromides and chlorides can be converted selectively
New and Efficient Synthesis of Pyrrolo[3,2-<i>b</i>]pyrrole-2,5-diones by Double-Anion-Capture Reactions of Ester Carbanions with Bis(imidoyl)chlorides of Oxalic Acid
作者:Peter Langer、Jörg Wuckelt、Manfred Döring
DOI:10.1021/jo991377u
日期:2000.2.1
A variety of pyrrolo[3,2-b]pyrrole-2,5-diones were efficiently prepared by a new domino-reaction of ester carbanions with oxalic acid−bis(imidoyl)chlorides. This reaction proceeded by condensation of 2 equiv of the ester with the bis(imidoyl)chloride and subsequent intramolecular attack of the nitrogen atoms of the bis-enamine intermediate onto the ester groups. The products, which can be regarded
[EN] COMPOUNDS FOR THE REDUCTION OF ß-AMYLOID PRODUCTION<br/>[FR] COMPOSÉS POUR LA RÉDUCTION DE LA PRODUCTION DE ß-AMYLOÏDE
申请人:BRISTOL MYERS SQUIBB CO
公开号:WO2012103297A1
公开(公告)日:2012-08-02
The present disclosure provides a series of compounds of the formula (I), which modulate β-amyloid peptide (β-ΑΡ) production and are useful in the treatment of Alzheimer's Disease and other conditions affected by β-amyloid peptide (β-ΑΡ) production.
Practical Synthesis of 2-Arylacetic Acid Esters via Palladium- Catalyzed Dealkoxycarbonylative Coupling of Malonates with Aryl Halides
作者:Bingrui Song、Felix Rudolphi、Thomas Himmler、Lukas J. Gooßen
DOI:10.1002/adsc.201100102
日期:2011.6
A new palladium‐based system was developed that catalyzes the coupling of arylhalides with diethyl malonates in the presence of mild bases. In the course of the reaction, the intermediately formed diethyl arylmalonate is directly converted into the arylacetic acid ester via liberation of carbon dioxide and an alkanol. This cross‐coupling/dealkoxycarbonylation process provides an efficient and high‐yielding