[EN] CD73 INHIBITORS AND USES THEREOF<br/>[FR] INHIBITEURS DE CD73 ET LEURS UTILISATIONS
申请人:PELOTON THERAPEUTICS INC
公开号:WO2018183635A1
公开(公告)日:2018-10-04
Compounds that modulate CD73 activity, pharmaceutical compositions containing these compounds, and methods of using these compounds for treating diseases associated with CD73 activity are described herein.
Modified nucleosides in tRNAs play an important role in the translational process. They fine tune the codon-anticodon interactions and they influence the folding and stabilisation of the tRNA structure. Herein, we present a novel synthetic route to the highly modified nucleosides PreQ(0) and archaeosine. The synthesis involves coupling of a protected 7-cyano-7-deazaguanosine nucleobase with a TBDMS
A series of 8-substituted 1-methyl-1,4-dihydropyrazolo[3′,4′:4,5]pyrrolo[2,3-d]pyrimidine (methylpyrazolo-fused 7-deazapurine) ribonucleosides have been designed and synthesized. Two syntheticapproaches to the key heterocyclic aglycon 7, (i) a six-step classical heterocyclization starting from 5-chloro-1-methyl-4-nitropyrazole and (ii) a three-step cross-coupling and cyclization approach starting
设计并合成了一系列的8-取代的1-甲基-1,4-二氢吡唑并[3',4':4,5]吡咯并[2,3- d ]嘧啶(甲基吡唑并稠合的7-脱氮嘌呤)核糖核苷。关键杂环糖苷配基7的两种合成方法,(i)从5-氯-1-甲基-4-硝基吡唑开始的六步经典杂环化,和(ii)从镀锌开始的三步交叉偶联和环化方法4,6-二氯嘧啶的可比总产率为18%对13%。通过三种不同的方法尝试了7的糖基化反应,但只有Vorbrüggen甲硅烷基试剂盒有效且立体选择性,可提供所需的β-异头核苷中间体17A。其在位置8的亲核取代或交叉偶联反应以及糖部分的脱保护得到了吡唑并稠合的脱氮嘌呤核糖核苷的八种衍生物,其中一些具有弱荧光性。甲基,氨基和甲基硫烷基衍生物在体外对一组癌症和白血病细胞系发挥亚微摩尔的细胞毒作用,并在复制子测定中对丙型肝炎病毒产生抗病毒作用。
Structure−Activity Relationships of 7-Deaza-6-benzylthioinosine Analogues as Ligands of<i>Toxoplasma gondii</i>Adenosine Kinase
作者:Young Ah Kim、Ashoke Sharon、Chung K. Chu、Reem H. Rais、Omar N. Al Safarjalani、Fardos N. M. Naguib、Mahmoud H. el Kouni
DOI:10.1021/jm800201s
日期:2008.7
Several 7-deaza-6-benzylthioinosine analogues with varied substituents on aromatic ring were synthesized and evaluated against Toxoplasma gondii adenosine kinase (EC.2.7.1.20). Structure-activity relationships indicated that the nitrogen atom at the 7-position does not appear to be a critical structural requirement. Molecular modeling reveals that the 7-deazapurine motif provided flexibility to the 6-benzylthio group as a result of the absence of H-bonding between N7 and Thr140. This flexibility allowed better fitting of the 6-benzylthio group into the hydrophobic pocket of the enzyme at the 6-position. In general, single substitutions at the para or meta position enhanced binding. On the other hand., single substitutions at the ortho position led to the loss of binding affinity. The most potent compounds, 7-deaza-p-cyano-6-benzylthioinosine (IC(50) = 5.3 mu M) and 7-deaza-p-methoxy-6-benzylthioinosine (IC(50) = 4.6 mu M), were evaluated in cell culture to delineate their selective toxicity.