Design, synthesis and antitumour activity of bisquinoline derivatives connected by 4-oxy-3-fluoroaniline moiety
摘要:
A series of novel bisquinoline derivatives connected by a 4-oxy-3-fluoroaniline moiety were synthesized and evaluated for their in vitro antitumour activities against a panel of five cancer cell lines (H460, HT-29, MKN-45, U87MG, and SMMC-7721). Most of compounds tested showed a potent activity and high selectivity towards the H460 and MKN-45 cell lines. Among the compounds tested, six (15d, 15e, 15m, 15n, 16a, and 16i) were further examined for their c-Met kinase activity; the compounds showed high efficacy with IC50 values in the single-digit nM range. An analysis of structure activity relationships indicated that an unsubstituted or a halogen-substituted phenyl ring on the 2-arylquinoline-4-carboxamide moiety was favourable for antitumour activity. (C) 2013 Elsevier Masson SAS. All rights reserved.
Bis-[4-(R-amino)-1-pyridinium]alkanes are prepared by reacting a 4-(R-amino)pyridine with an appropriate disubstituted alkane. The compounds are useful as antimicrobial agents. Certain species are also useful as dental plaque-preventive agents.
Catalytic Staudinger Reduction at Room Temperature
作者:Danny C. Lenstra、Joris J. Wolf、Jasmin Mecinović
DOI:10.1021/acs.joc.9b00831
日期:2019.5.17
catalytic Staudingerreduction at room temperature that enables the preparation of a structurally diverse set of amines from azides in excellent yields. The reaction is based on the use of catalytic amounts of triphenylphosphine as a phosphine source and diphenyldisiloxane as a reducing agent. Our catalytic Staudingerreduction exhibits a high chemoselectivity, as exemplified by reduction of azides
Highly Chemo- and Regioselective Reduction of Aromatic Nitro Compounds Using the System Silane/Oxo-Rhenium Complexes
作者:Rita G. de Noronha、Carlos C. Romão、Ana C. Fernandes
DOI:10.1021/jo9008657
日期:2009.9.18
The reduction of aromatic nitrocompounds to the corresponding amines with silanes catalyzed by high valent oxo-rhenium complexes is reported. The catalytic systems PhMe2SiH/ReIO2(PPh3)2 (5 mol %) and PhMe2SiH/ReOCl3(PPh3)2 (5 mol %) reduced efficiently a series of aromatic nitrocompounds in the presence of a wide range of functional groups such as ester, halo, amide, sulfone, lactone, and benzyl
The reduction of aromatic and aliphatic nitro groups to anilines and amines is performed with good yield and selectivity in short reaction times. A mixture of sodium hypophosphite and phosphinic acid is used in the presence of a heterogeneous catalyst 2.5 mol% of Pd/C (5%) in a biphasic water/2-MeTHF system.
Oral Disinfectants Inhibit Protein-Protein Interactions Mediated by the Anti-Apoptotic Protein Bcl-x<sub>L</sub>and Induce Apoptosis in Human Oral Tumor Cells
been used as oraldisinfectants by humans. Both compounds inhibitprotein–proteininteractionsmediated by the anti‐apoptotic protein Bcl‐xL at physiologically relevant concentrations and induceapoptosis in a series of tumorcell lines derived from the tongue and pharynx (see picture). Inhibition of protein–proteininteractions is a potential mode of action of drugs in current human use.