Development of 1-aryl-3-furanyl/thienyl-imidazopyridine templates for inhibitors against hypoxia inducible factor (HIF)-1 transcriptional activity
摘要:
1,3-Disubstituted-imidazopyridines were designed for developing inhibitors against HIF-1 transcriptional activity. Designed compounds were rapidly synthesized from a key aromatic scaffold via microwave-assisted Suzuki-Miyaura coupling/C-H direct arylation sequence. Evaluation of ability to inhibit the hypoxia induced transcriptional activity of HIF-1 revealed that the compound 2i and 3a retained the same level of the inhibitory activity comparing with that of known inhibitor, YC-1 (1). Identified, readily accessible 1-aryl-3-furanyl/thienyl-imidazopyridine templates should be useful for future drug development. (C) 2016 Elsevier Ltd. All rights reserved.
Isonitrile alkylations: a rapid route to imidazo[1,5-a]pyridines
作者:Yajun Li、Allen Chao、Fraser F. Fleming
DOI:10.1039/c5cc08724d
日期:——
Metalated isonitriles react with 2-chloropyridine-type electrophiles in an addition–cyclization route to valuable heterocycles.
金属化异腈与2-氯吡啶类亲电试剂发生加成-环化反应,形成有价值的杂环化合物。
1-Substituted-imidazo[1,5-<i>a</i>]pyridin-3-ylidenes as Highly Efficient Ligands for Rh- and Ir-catalyzed Transfer Hydrogenation of Carbonyl Compounds
作者:Yuma Koto、Fumitoshi Shibahara、Toshiaki Murai
DOI:10.1246/cl.160740
日期:2016.11.5
The transfer hydrogenation of carbonyl compounds catalyzed by Rh and Ir complexes bearing 1-substituted-imidazo[1,5-a]pyridin-3-ylidene ligands is reported. These catalysts, especially the Rh catalyst, showed high efficiency for the reaction. Comparison of the reaction profiles of several conventional Rh-NHC and -phosphine complexes with the present system revealed that the present catalytic system
Imidazo[1,5-a]pyridin-3-ylidenes as π-accepting carbene ligands: substituent effects on properties of N-heterocyclic carbenes
作者:Yuma Koto、Fumitoshi Shibahara、Toshiaki Murai
DOI:10.1039/c6ob02827f
日期:——
fundamental character and the effects of substituents on the imidazo[1,5-a]pyridine backbone on the electronic character of carbenes were evaluated using rhodium complexes and selenium adducts. 13CNMRchemicalshifts of carbene carbons in imidazo[1,5-a]pyridin-3-ylidene and 1H and 13CNMRspectra of olefin moieties trans to the carbene in Rh(nhc)(cod)Cl complexes shifted relatively downfield compared
制备并表征了各种1-取代的咪唑并[1,5- a ]吡啶-3-基。使用铑配合物和硒加合物评估了咪唑并[1,5- a ]吡啶骨架上取代基的基本特征和对碳素电子特征的影响。13 C NMR在咪唑并卡宾碳的化学位移[1,5-一个]吡啶-3-亚基和1 H和13烯烃基部分的C NMR光谱反式到的Rh(NHC)卡宾(COD)氯络合物移位相对低磁场与带有常规N杂环卡宾(NHC)的相应配合物相比。反式的红外峰Rh(nhc)(CO)2 Cl络合物的-羰基部分比常规NHC出现的波数更高。这些观察结果表明,咪唑并[1,5 - a ]吡啶-3-亚基配体具有很强的π接受特性。Rh(nhc)(CO)2 Cl络合物通过X射线衍射分析进一步表征。为了进一步了解咪唑并[1,5 - a ]吡啶-3-基叉的电子特性,制备了硒脲。我们发现,将77 Se NMR化学位移和C-Se键的1 J C-Se耦合常数结合起来适用于对咪唑[1,5-
Bifurcated Nickel-Catalyzed Functionalizations: Heteroarene C−H Activation with Allenes
作者:Sachiyo Nakanowatari、Thomas Müller、João C. A. Oliveira、Lutz Ackermann
DOI:10.1002/anie.201709087
日期:2017.12.11
A unified strategy for nickel(0)‐catalyzed C−H allylations, alkenylations, and dienylations has been realized through versatile hydroarylations of allenes with ample scope. Thus, an inexpensive nickel catalyst modified with a N‐heterocyclic carbene ligand enabled the direct transformation of C−H bonds of biologically relevant imidazole and purine derivatives with full control of regio‐ and chemoselectivity
Synthesis of organometallic cyclometallated transition metal complexes
申请人:Lussier B. Barbara
公开号:US20060223997A1
公开(公告)日:2006-10-05
A process for forming a tris-cyclometallated complex comprises the step of reacting; a) an M(I) complex, wherein M represents Rh or Ir, and said complex comprises at least two ligands and contains at least two alkenyl groups pi-bonded to M, with b) a heterocyclic compound capable of forming a organometallic cyclometallated complex.