5458-49-1Relevant academic research and scientific papers
Monovalent K, Cs, Tl, and Ag nitrosodicyanomethanides: Completely different 3D networks with useful properties of luminescent materials and nonelectric sensors for gases?
Glover, Garrett,Gerasimchuk, Nikolay,Biagioni, Richard,Domasevitch, Konstantin V.
, p. 2371 - 2382 (2009)
Four K, Cs, Ag(I), and Tl(I) compounds with a nitrosodicyanomethanide ONC(CN)2 - anion have been obtained and characterized using IR spectroscopy; UV-visible spectroscopy; room temperature, solid-state photoluminescence; and solution
Structural elaboration of dicyanopyrazine: Towards push-pull molecules with tailored photoredox activity
Hlou?ková, Zuzana,Klikar, Milan,Pytela, Old?ich,Almonasy, Numan,R??i?ka, Ale?,Jandová, Veronika,Bure?, Filip
, p. 23797 - 23809 (2019/08/13)
As an extension of the successful dicyanopyrazine photoredox catalysts, a series of X-shaped push-pull molecules with a systematically altered structure were designed and facilely synthesized; their structure-property relationship was elucidated in detail
Spectrophotometric determination of pKa's of 1-Hydroxybenzotriazole and oxime derivatives in 95% acetonitrile-water
Fathalla, Magda Fouad,Khattab, Sherine Nabil
experimental part, p. 324 - 332 (2012/05/04)
1-hydroxybenzotriazole derivatives are used with carbodiimide as additives to generate active esters during peptide bond formation. They are also used as additives during the peptide bond formation. Dissociation constants of the 1-hdroxybenzotriazole (HOBt) and its derivatives, 1- hydroxy-6- chlorobenzotriazole, 1-hydroxy-6-trifluoromethylbenzotriazole, 1-hydroxy-6-nitrobenzotriazole were determined spectrophotometrically in 95% acetonitrile-water. In addition, 7-aza-1- hydroxybenzotriazole (7-HOAt) and 4-aza-1-hydroxybenzotriazole (4-HOAt) were also studied. Recently, oxyma was reported as a good replacement for the benzotriazole derivatives. As alcoholic components of active esters, the oximes seem to be good leaving groups. Therefore it was expected, that the strongly acidic and nucleophilic oximes, which possess electron-withdrawing groups in the molecule, are suitable as additives during the peptide bond formation. The dissociation constant of some oximes,such as diethyl 2-(hydroxyimino)malonate, ethyl 2-cyano-2-(hydroxyimino) acetate (oxyma), hydroxycarbonimidoyl dicyanide and N-hydroxypicolinimidoyl cyanide in 95% acetonitrile-water are reported.
COMU: A safer and more effective replacement for benzotriazole-based uronium coupling reagents
El-Faham, Ayman,Funosas, Ramon Subiros,Prohens, Rafel,Albericio, Fernando
experimental part, p. 9404 - 9416 (2010/04/03)
We describe a new family of uronium-type coupling reagents that differ in their iminium moieties and leaving groups. The presence of the morpholino group in conjunction with an oxime derivative-especially ethyl 2-cy ano-2- (hydroxyimino) acet ate (Oxyma)-had a marked influence on the solubilities, stabilities, and reactivities of the reagents. Finally, the new uronium salt derived from Oxyma (COMU) performed extremely well in the presence of only 1 equiv of base, thereby confirming the effect of the hydrogen bond acceptor in the reaction. COMU also showed a less hazardous safety profile than the benzotriazolebased HDMA and HDMB, which exhibited unpredictable autocatalytic decompositions. Furthermore, the Oxyma moiety contained in COMU suggests a lower risk of explosion than in the case of the benzotriazole derivatives.
