195253-49-7Relevant articles and documents
Novel triphenylamine-connected indolinium fluorescence sensor for detection of the cyanide anion and DFT calculations
Dalkilic, Oguzhan,Lafzi, Ferruh,Kilic, Haydar,Saracoglu, Nurullah
, (2020)
A new triphenylamine based probe (TPA) for detection of the cyanide anion (CN?) was designed and synthesized. In aqueous solution, TPA showed rapid fluorescence response and excellent selectivity for CN? ions, and other anions did not affect the detection process. The probe displays a detection limit of 1.17 μM which is lower than the threshold (1.9 μM) regulated by the World Health Organization (WHO) for CN? ions in aqueous solution. The sensitivity and photophysical properties of TPA were investigated using UV–Vis spectrophotometry, fluorescence spectrofluorometry, and 1H NMR titration techniques. Density functional theory (DFT) calculations were carried out to better understand the relationship between the photophysical properties and the electronic structures of TPA and TPA-CN.
Microwave-assisted synthesis method for ethylation reaction
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Paragraph 0012, (2019/10/05)
The invention relates to a microwave-assisted synthesis method for an ethylation reaction. The method is characterized in that a reaction substrate is in an organic solvent, trifluoroacetic acid ethyl ester is taken as an ethylation reagent, in the presence of an alkali, microwave-assisted heating is carried out for 2 minutes, and a corresponding ethylation product can be obtained. The invention provides a new method for the ethylation reaction. The reaction rate of the method is several times higher than that of a traditional method, the operation is simple and convenient, the cost is low, the reaction time is short, the application range of the substrate is wide, the use of the expensive or hypertoxic ethylation reagent can also be avoided, and the method has higher application value.
Introducing tetramethylurea as a new methylene precursor: a microwave-assisted RuCl3-catalyzed cross dehydrogenative coupling approach to bis(indolyl)methanes
Deb, Mohit L.,Borpatra, Paran J.,Saikia, Prakash J.,Baruah, Pranjal K.
supporting information, p. 1435 - 1443 (2017/02/15)
Herein we report a microwave assisted Ru(iii)/TBHP-mediated reaction of indoles with tetramethylurea (TMU) synthesizing symmetrical as well as unsymmetrical bis(indolyl)methanes, where TMU acts as a methylenating agent. This is the first report where TMU is used as a methylene source. Moreover, the synthesis of unsymmetrical bis(indolyl)methanes by using a carbon precursor is also reported herein for the first time. Various substituted indoles are used for the reaction. The reaction is high yielding and takes a much shorter time to accomplish compared to the existing methods.
