Synthesis and characterization of novel phenylindoles as potential probes for imaging of β-amyloid plaques in the brain
摘要:
We synthesized a novel series of phenylindole (PI) derivatives and evaluated their biological activities as probes for imaging A beta plaques in vivo. The affinity for A beta plaques was assessed by an in vitro-binding assay using pre-formed synthetic A beta aggregates. 2-Phenyl-1H-indole (2-PI) derivatives showed high affinity for A beta 42 aggregates with K-i values ranging from 4 to 32 nM. 2-PI derivatives clearly stained A beta plaques in an animal model of AD. In biodistribution experiments using normal mice, 2-PI derivatives displayed sufficient uptake for imaging, ranging from 1.1% to 2.6% ID/g. Although additional modifications are necessary to improve uptake by and clearance from the brain, 2-PI derivatives may be useful as a backbone structure to develop novel Ab imaging agents. (C) 2010 Elsevier Ltd. All rights reserved.
The facile synthesis of 2-bromoindoles via Cs2CO3-promoted intramolecular cyclization of 2-(gem-dibromovinyl)anilines under transition-metal-free conditions
A palladium-catalyzed tandem addition/cyclization of 2-(2-aminoaryl)acetonitriles with arylboronic acids has been developed for the first time, achieving a new strategy for direct construction of indole skeletons. This system shows good functional group tolerance and remarkable chemoselectivity. In particular, the halogen (e.g., bromo and iodo) substituents are amenable to further synthetic elaborations
Direct C-Arylation of Free (NH)-Indoles and Pyrroles Catalyzed by Ar−Rh(III) Complexes Assembled In Situ
作者:Xiang Wang、Benjamin S. Lane、Dalibor Sames
DOI:10.1021/ja050279p
日期:2005.4.1
Ar-Rh(III) pivalate complexes assembled in situ from the reaction of [RhCl(coe)2]2 (coe = cis-cyclooctene), [p-(CF3)C6H4]3P, and CsOPiv effectively catalyzed the direct C-arylation of free (NH)-indoles and (NH)-pyrroles in good yields and with high regioselectivity. The reaction displayed excellent functional group compatibility and low moisture sensitivity. Kinetics studies support a mechanism involving
Pd-catalyzed C–H bond activation of Indoles for Suzuki reaction
作者:Isita Banerjee、Keshab Ch Ghosh、Surajit Sinha
DOI:10.1007/s12039-019-1649-y
日期:2019.8
practical method for Suzuki coupling by which unprotected or N-protected indoles may be selectively arylated in the C2-position through direct C–H bond activation by electrophilic \(\hbox Pd(TFA)}_2}\) catalyst. The protocol is operationally simple as it is carried out in dioxane/water mixture, and air as the sole oxidant at room temperature. Various 2-arylated indoles were obtained in good yields
was developed through palladium-catalyzed tandem addition/cyclization of potassium aryltrifluoroborates with aliphatic nitriles in aqueous medium. The use of water as the reaction medium makes the synthesis process environmentally benign. A plausible mechanism for the formation of 2-arylindoles involving sequential nucleophilic addition followed by an intramolecular cyclization is proposed. Moreover
Development of Novel Bis(indolyl)-hydrazide–Hydrazone Derivatives as Potent Microtubule-Targeting Cytotoxic Agents against A549 Lung Cancer Cells
作者:Dipanwita Das Mukherjee、N. Maruthi Kumar、Mukund P. Tantak、Amlan Das、Arnab Ganguli、Satabdi Datta、Dalip Kumar、Gopal Chakrabarti
DOI:10.1021/acs.biochem.5b01127
日期:2016.5.31
synthesize novel bis(indolyl)-hydrazide–hydrazone derivatives (NMK-BH compounds) and recognized NMK-BH3 as the most effective one in inhibiting A549cell proliferation and assembly of tissue-purified tubulin. Cell viability experiments showed that NMK-BH3 inhibited proliferation of humanlung adenocarcinoma (A549) cells, normal humanlung fibroblasts (WI38) and peripheral blood mononuclear cells (PBMC)