Topic
Triazene
About: Triazene is a research topic. Over the lifetime, 759 publications have been published within this topic receiving 8714 citations. The topic is also known as: Triazene cleavage & 1-triazene.
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TL;DR: In this paper, mixed ruthenium complexes of type [Ru(bipy)2L]ClO4·H2O derived from 2,2′-bipyridine (bipY) and triazene 1-oxides, RN(O)N-NH-C6H4X-p(HL: R = Et or Ph; X = Me, H, Cl, CO2Et, or NO2) are described.
Abstract: Mixed ruthenium complexes of type [Ru(bipy)2L]ClO4·H2O derived from 2,2′-bipyridine (bipy) and triazene 1-oxides, RN(O)N–NH–C6H4X-p(HL: R = Et or Ph; X = Me, H, Cl, CO2Et, or NO2) are described. In solution they display two quasi-reversible reductions due to electron transfer to co-ordinated bipy units. The RuIII–RuII couple occurs in the range 0.16–0.44 V versus s.c.e. The formal potential of this couple is linearly related to the Hammett constant of substituent X. The low-spin ruthenium(III) analogue, [Ru(bipy)2L]2+, is furnished by both coulometric and chemical oxidations. The energy of the ligand-to-metal charge-transfer band of [Ru(bipy)2L]2+ correlates linearly with the RuIII–RuII formal potential.
TL;DR: In this article, the NH proton was fixed in an intramolecular hydrogen bond to one of the anthraquinone carbonyl oxgen atoms, resulting in tetra-O-acetyl-D-xylopyranose.
Abstract: O-Unprotected glycosyltriazenes are prepared for the first time by coupling of 1-anthraquinone-1-diazonium hydrogensulfate with β-glycopyranosylamines to afford 1- (anthraquinone-1-yl)-3-( β-glycopyranosyl)triazenes 3a—h. Acetylation of compounds 3 furnished the O-acetates 4a—g. The stability of triazenes 3 results from fixation of the NH proton in an intramolecular hydrogen bond to one of the anthraquinone carbonyl oxgen atoms. Treatment of triazenes 4 with tert-butyl hypochlorite afforded acetoglycosyl chlorides 6 and 1-azidoanthraquinone 7. With acetic acid the triazene 4a formed tetra-O-acetyl-D-xylopyranose 9 together with 1- aminoanthraquinone 10.
Patent•
24 Oct 2013
TL;DR: In this article, a preparation method of fluorene compounds is presented, which is based on a carbocation-induced sp hydrocarbon bond activating process by adopting triazene biphenyl as a substrate and taking the acid as a catalyst.
Abstract: The invention discloses a preparation method of fluorene compounds. The preparation method comprises the following steps of: carrying out reaction onto biphenyl triazene in a solvent under action of an acid; carrying out simple post-treatment after the reaction is completed to obtain the fluorene compounds. The preparation method disclosed by the invention obtains a series of fluorene compounds through a carbocation-induced sp hydrocarbon bond activating process by adopting triazene biphenyl as a substrate and taking the acid as a catalyst. The preparation method avoids application of a transition metal catalyst, and lowers production cost. Meanwhile, the reaction is carried out in liquid phase, and has important industrial application value.