37471-70-8Relevant articles and documents
Iridium and copper supported on silicon dioxide as chemoselective catalysts for dehydrogenation and borrowing hydrogen reactions
Zhu, Guanxin,Duan, Zheng-Chao,Zhu, Haiyan,Qi, Minghui,Wang, Dawei
, (2021)
High active ligand usually plays an important role during catalysis and synthesis chemistry. A new and efficient benzotriazole-pyridinyl-silane ligand (BPS) was designed, and the corresponding iridium and copper catalysts were synthesized and thoroughly characterized by means of EDS, TEM, and XPS. The resulting iridium composite revealed excellent catalytic activity for the reaction of tert-butanesulfinamide with benzyl alcohols, while copper catalyst could realize the synthesis of unsaturated carbonyl compounds through the reaction of benzyl alcohols with ketones. This provided an efficient method for selective synthesis of unsaturated carbonyl compounds from benzyl alcohols and ketones in high yields with good recovery performance.
A new solid acid catalyst FeCl3/bentonite for aldol condensation under solvent-free condition
Muthuvel,Dineshkumar,Thirumurthy,Rajasri,Thirunarayanan
, p. 252 - 260 (2017/01/18)
For the first time, a new solid acid catalyst has been used for the synthesis of aryl chalcones under solvent free conditions. A simple method (solid dispersion method) has been adopted for the synthesis of FeCl3/bentonite. The prepared catalyst has been characterized by different characterization techniques. A series of E-1-(substituted phenyl)-3-(1-pyrenyl)-2-propen-1-ones have been synthesized using FeCl3/bentonite under microwave-assisted solvent-free conditions. The yields are in the range from 80 to 88%. All the synthesized chalcones have been characterized by their physical constants, analytical, IR, 1H and 13C NMR spectral data. This catalyst can be reused for further runs (after fifth cycle) without decrease in activity. This catalyst gives excellent yields and is inexpensive and easily recyclable for this reaction.
A straightforward synthesis of pyrazolines and pyrazoles: Palladium-catalyzed carbonylative vinylation-cyclocondensation reactions of aryl halides
Wu, Xiao-Feng,Neumann, Helfried,Beller, Matthias
experimental part, p. 4919 - 4924 (2011/10/31)
A novel consecutive one-pot synthesis of pyrazolines and pyrazoles starting from simple aryl halides, styrenes, carbon monoxide, and hydrazines has been established. Palladium-catalyzed carbonylative vinylation of aryl halides gave the corresponding chalcones, which are trapped in situ by addition of hydrazines.
