119754-15-3Relevant academic research and scientific papers
Photoinduced Hydroarylation and Cyclization of Alkenes with Luminescent Platinum(II) Complexes
Cheng, Hanchao,Lam, Tsz-Lung,Liu, Yungen,Tang, Zhou,Che, Chi-Ming
supporting information, p. 1383 - 1389 (2020/11/30)
Photoinduced hydroarylation of alkenes is an appealing synthetic strategy for arene functionalization. Herein, we demonstrated that aryl radicals generated from electron-deficient aryl chlorides/bromides could be trapped by an array of terminal/internal aryl alkenes in the presence of [Pt(O^N^C^N)] under visible-light (410 nm) irradiation, affording anti-Markovnikov hydroarylated compounds in up to 95 % yield. Besides, a protocol for [Pt(O^N^C^N)]-catalyzed intramolecular photocyclization of acrylanilides to give structurally diverse 3,4-dihydroquinolinones has been developed.
Fluorescent nucleosides with 'on-off' switching function, pH-responsive fluorescent uridine derivatives
Saito, Yoshio,Miyamoto, Shigenori,Suzuki, Azusa,Matsumoto, Katsuhiko,Ishihara, Tsutomu,Saito, Isao
scheme or table, p. 2753 - 2756 (2012/05/19)
We synthesized various pH-responsive fluorescent deoxyuridine derivatives (1a-g). These fluorescent nucleosides exhibited distinctive fluorescence at 470-600 nm in aqueous solvents containing methanol only at acidic to neutral pH values. In particular, 1f exhibited strong fluorescence only at pH range of 3.1-7.2 with a pKa of 6.1. Such pH-sensitive fluorescent nucleosides can be used as 'on-off' fluorescence switch for monitoring pH change in biological systems, particularly for cancer cell detection.
Synthesis and characterization of novel phenylindoles as potential probes for imaging of β-amyloid plaques in the brain
Watanabe, Hiroyuki,Ono, Masahiro,Haratake, Mamoru,Kobashi, Nobuya,Saji, Hideo,Nakayama, Morio
experimental part, p. 4740 - 4746 (2010/08/19)
We synthesized a novel series of phenylindole (PI) derivatives and evaluated their biological activities as probes for imaging Aβ plaques in vivo. The affinity for Aβ plaques was assessed by an in vitro-binding assay using pre-formed synthetic Aβ aggregates. 2-Phenyl-1H-indole (2-PI) derivatives showed high affinity for Aβ42 aggregates with Ki values ranging from 4 to 32 nM. 2-PI derivatives clearly stained Aβ 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 Aβ imaging agents.
Quick assembly of 1,4-diphenyltriazoles as probes targeting β-amyloid aggregates in Alzheimer's disease
Qu, Wenchao,Kung, Mei-Ping,Hou, Catherine,Oya, Shunichi,Kung, Hank F.
, p. 3380 - 3387 (2008/02/08)
Accumulation of β-amyloid aggregates (Aβ) in the brain is linked to the pathogenesis of Alzheimer's disease (AD). We report a novel approach for producing 1,4-diphenyltriazoles as probes for targeting Aβ aggregates in the brain. The imaging probes, a seri
Synthesis of Some Substituted Dimethyl and Diethyl 4-(Phenylethynyl)-2,6-pyridinedicarboxylates
Takalo, Harri,Kankare, Jouko,Haenninen, Elina
, p. 448 - 454 (2007/10/02)
Substituted dimethyl and diethyl 4-(phenylethynyl)-2,6-pyridinedicarboxylates were prepared by coupling reactions between dialkyl 4-halo-2,6-pyridinedicarboxylates and terminal arylacetylenes in the presence of an organopalladium catalyst and copper(I) iodide in a suitable solvent system.The terminal acetylenes needed in this work were synthesized from the corresponding aryl halides using either (trimethylsilyl)acetylene or 2-methyl-3-butyn-2-ol followed by deprotection of the triple bond, depending on the nature of the compound in question.
