Microwave assisted sulfopropylation of N-heterocycles using 1,3-propane sultone
摘要:
Dramatic rare acceleration was observed for N-sulfopropylation of heterocyclic compounds (1a-h) using 1,3-propane sultone(2) under microwave irradiation affording the N-sulfopropylated compounds (3a-h) in 68-95% yield. (C) 1998 Elsevier Science Ltd. All rights reserved.
MTOQS-induced dual organelle oxidativestress could diminish the degree of oxidative phosphorylation and glycolysis in cancer cells and trigger an alteration in the culture environment of cancer cells, while causing damage to the endoplasmicreticulum and mitochondria through multiorganelle oxidativestress, turning on the pathway of apoptosis and consequently driving cancer cells to apoptosis.
Construction of wavelength-tunable DSE quinoline salt derivatives by regulating the hybridization form of the nitrogen atom and intramolecular torsion angle
Dual-state emission (DSE) molecules displayed conspicuous fluorescent performance both in solid and solution states. However, the construction of DSE molecules and the regulation of their emission wavelengths remains a great challenge. Based on the structure-function relationship of quinolinonitrile-type fluorophores, this work proposed a feasible strategy for modulating their fluorescent properties
A series of novel quinoline derivatives L1-L3 with a D-pi-A type were developed as a fluorescent viscosity probe in vitro. L1-L3 displayed very weak emission in nonviscous media and remarkable fluorescence enhancement with the viscosity augment in the water/glycerol system, especially for 12. Different substituent units exhibit a considerable influence on the photophysical properties and response sensitivity of the probes to viscosity. Probes L1-L3 exhibited a direct linear relationship well between log (I/I-0) and the log eta, which allowed us to quantitatively measure the environmental viscosity. Moreover, L2 modified with 1-butoxy-2-methoxybenzene has been certified to be more sensitive to viscosity because of moderate electron-donating ability. Cell imaging experiments illustrated that L1-L3 is suitable for visualizing the viscosity changes in living cells. As a result, the present work offers a strategy for rationally designing fluorescence probe for viscosity detection in living cells. (C) 2019 Elsevier Ltd. All rights reserved.
Crown-ether styryl dyes
作者:S. P. Gromov、O. A. Fedorova、E. N. Ushakov、A. V. Buevich、M. V. Alfimov
DOI:10.1007/bf00696719
日期:1995.11
Styryl dyes (4a,b) containing a 15-crown-5 fragment and isomeric 2- and 4-quinolinium residues with an N-sulfopropyl substituent undergo [2+2] -autophotocycloaddition to give cyclobutane derivatives (9a,b) in acetonitrile only in the presence of Mg(ClO4)(2) or Ca(ClO4)(2). The stereospecificity of both pathways of photocycloaddition and its efficiency are explained by the preorganization of the supramolecular dimers derived from the trans-isomers of the dyes when they are bound into complexes with Mg and Ca cations.
PROCEDE DE TEINTURE METTANT EN OEUVRE UN DERIVE CATIONIQUE SPECIFIQUE ET UN COMPOSE CHOISI PARMI UN ALDEHYDE SPECIFI QUE, UNE CETONE SPECIFIQUE, UNE QUINONE ET UN DERIVE DE LA DI-IMINO-ISOINDOLINE OU DE LA 3-AMINO-INDOLONE