20964-97-0Relevant academic research and scientific papers
Synthesis of functionalized 1,2,3-triazoles using Bi2WO6 nanoparticles as efficient and reusable heterogeneous catalyst in aqueous medium
Paplal, Banoth,Nagaraju, Sakkani,Palakollu, Veerabhadraiah,Kanvah, Sriram,Kumar, B. Vijaya,Kashinath, Dhurke
, p. 57842 - 57846 (2015/07/20)
Synthesis of functionalized triazoles is reported via Bi2WO6 nanoparticle (10 mol%) mediated 1,3-dipolar cycloaddition reactions of β-nitrostyrenes, phenylacetylene and chalcones with azides (80 °C, 2-6 h) in water. The regioselectiv
One-pot eschenmoser episulfide contractions in DMSO: Applications to the synthesis of fuligocandins A and B and a number of vinylogous amides
Pettersson, Birgitta,Hasimbegovic, Vedran,Bergman, Jan
, p. 1554 - 1561 (2011/05/19)
Practical total syntheses of the natural products fuligocandin A (2a) and fuligocandin B (3) have been achieved through a convergent strategy depending on the Eschenmoser episulfide contraction as a key step. Conducting the reaction in DMSO proved to be an efficient and general method for the synthesis of a variety of vinylogous amides, such as azepan-2- ylidenepropan-2-one. 2011 American Chemical Society.
Room-temperature synthesis of pyrazoles, diazepines, β-enaminones, and β-enamino esters using silica-supported sulfuric acid as a reusable catalyst under solvent-free conditions
Chen, Xiang,She, Jin,Shang, Zhi-Cai,Wu, Jun,Zhang, Peizhi
experimental part, p. 947 - 957 (2009/09/06)
Silica-supported sulfuric acid (H2SO4·SiO2) has been utilized as a heterogeneous recyclable catalyst for a highly efficient regio- and chemoselective condensation of hydrazines/hydrazides, diamines, and primary amines with various β-dicarbonyl compounds at room temperature to afford pyrazoles, diazepines, and β-enaminones/β-enamino esters under solvent-free conditions within 5-15 min. Copyright Taylor & Francis Group, LLC.
Synthesis of pyrazoles, diazepines, enaminones, and enamino esters using 12-tungstophosphoric acid as a reusable catalyst in water
Chen, Xiang,She, Jin,Shang, Zhicai,Wu, Jun,Wu, Haifeng,Zhang, Peizhi
experimental part, p. 3478 - 3486 (2009/05/09)
12-Tungstophosphoric acid (H3PW12O40) is found to be an efficient and recyclable catalyst in promoting a chemo- and regioselective condensation of hydrazines/hydrazides, diamines, and primary amines with various 1,3-dicarbonyl compounds in pure water at room temperature to afford pyrazoles, diazepines, and enaminones/enamino esters, respectively, in high yields. Georg Thieme Verlag Stuttgart.
Reactions of lithium silylcuprates with pyrazolium and indazolium salts
Gonzalez-Nogal, Ana M.,Calle, Mariola,Cuadrado, Purificacion
, p. 6089 - 6096 (2008/09/17)
Although pyrazolium salts have been shown to be unreactive toward lithium carbocuprates, these substrates were opened by lithium silylcuprate reagents to give versatile N-silylated β-enaminoimines stabilized by coordination of the silyl group with both ni
Solution and solid state structure and tautomerism of azo coupled enaminone derivatives of benzoylacetone
Simunek, Petr,Bertolasi, Valerio,Peskova, Marketa,Machacek, Vladimir,Lycka, Antonin
, p. 1217 - 1226 (2007/10/03)
The reaction of 4-substituted benzenediazonium tetrafluoroborates with 3-amino-1-phenylbut-2-en-1-one, 4-amino-4-phenylbut-3-en-2-one and their N-aryl derivatives 1a-1g has been used to prepare the respective azo coupling products i.e. compounds 2-5 from
The Reaction of 3-(1-Imidazolyl)-2-alken-1-ones with Nucleophiles
Kashima, C.,Tajima, T.,Shimizu, M.,Omote, Y.
, p. 1325 - 1328 (2007/10/02)
Generally 3-hetero-substituted 2-alken-1-ones were prepared from 1,3-alkanediones, 3-chloro-2-alken-1-ones, or conjugated ynones.The preparation of 3-hetero-substituted 2-alken-1-ones was subjected to some limitations by these methods.By the reaction of 3-(1-imidazolyl)-2-alken-1-ones (I) and 3-(3-oxo-1-alkenyl)-1-methylimidazolium iodides (II) with nucleophiles, 3-hetero-substituted 2-alken-1-ones could be obtained regioselectively in good yield under mild conditions.These results suggested that compounds I and II were concluded to be useful intermediates for the organic synthesis.
