14482-11-2Relevant articles and documents
Effect of phase transfer chemistry, segmented fluid flow, and sonication on the synthesis of cinnamic esters
Riccaboni, Mauro,La Porta, Elena,Martorana, Andrea,Attanasio, Roberta
, p. 4032 - 4039 (2010)
Wittig reaction under Phase Transfer conditions was performed in a flow reaction system. Different bases, aldehydes, phosphonium salts, and flow reaction parameters were investigated, in absence of a phase transfert catalyst. An improvement of the reaction outcome (yield and reaction time) was achieved through the immersion of the reactor into an ultrasound bath.
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Lorz et al.
, p. 483 (1951)
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Wittig reaction using perfluorinated ylides
Galante, Aurélie,Lhoste, Paul,Sinou, Denis
, p. 5425 - 5427 (2001)
Wittig reactions could be performed in perfluorosolvents using perfluorinated ylides, allowing both a very easy separation of the alkene from the phosphine oxide and a re-use of the latter by simple reduction of the crude oxide.
C-H activation reactions of ruthenium N-heterocyclic carbene complexes: Application in a catalytic tandem reaction involving C-C bond formation from alcohols
Burling, Suzanne,Paine, Belinda M.,Nama, Devendrababu,Brown, Victoria S.,Mahon, Mary F.,Prior, Timothy J.,Pregosin, Paul S.,Whittlesey, Michael K.,Williams, Jonathan M. J.
, p. 1987 - 1995 (2007)
A series of ruthenium hydride N-alkyl heterocyclic carbene complexes has been investigated as catalysts for a tandem oxidation/Wittig/reduction reaction to give C-C bonds from alcohols. The C-H-activated carbene complex Ru(I iPr2Me2)′(PPh3) 2(CO)H (9) proves to be the most active precursor catalyzing the reaction of PhCH2OH and Ph3P=CHCN in 3 h at 70 °C. These results provide (a) a rare case in which N-alkyl carbenes afford higher catalytic activity than their N-aryl counterparts and (b) a novel example of the importance of NHC C-H activation in a catalytic cycle.
Synthesis of a new Pd(0)-complex supported on boehmite nanoparticles and study of its catalytic activity for Suzuki and Heck reactions in H2O or PEG
Ghorbani-Choghamarani, Arash,Tahmasbi, Bahman,Moradi, Parisa
, p. 43205 - 43216 (2016)
Boehmite nanoparticles are a cubic orthorhombic structure of aluminum oxide hydroxide containing hydroxyl groups attached to their surface, which were prepared in water using commercially available materials. A moisture- and air-stable palladium S-methylisothiourea complex supported on boehmite nanoparticles (Pd(0)-SMTU-boehmite) was prepared using a very simple and inexpensive procedure without an inert atmosphere using commercially available materials. This nanostructure compound was used as an excellent organometallic catalyst for Suzuki and Heck reactions in H2O or PEG-400. The synthesized nanoparticles were characterized using FT-IR, XRD, BET, TGA, TEM, SEM, EDS and ICP-OES techniques. Nitrogen adsorption/desorption measurements indicated that the boehmite nanoparticles have a BET surface area of about 122.8 m2 g-1. This heterogeneous nanocatalyst was easily separated from the reaction mixture and reused for several consecutive runs without significant loss of its catalytic efficiency or palladium leaching. The leaching of palladium from the catalyst was examined using hot filtration and ICP-OES techniques.
4,5-dihydroisoxazoles from arylcyclopropanes: II. Reaction of arylcyclopropanes with nitrosyl chloride activated by sulfur(VI) oxide
Bondarenko,Gavrilova,Kazantseva,Tikhanushkina,Nifant'ev,Saginova,Zyk
, p. 564 - 570 (2007)
Arylcyclopropanes react with nitrosyl chloride activated by sulfur(VI) oxide to give the corresponding 5-aryl-4,5-dihydro-1,2-oxazoles in quantitative yields. The complex NOC1?2SO3 is a highly efficient nitrosating agent which makes it possible to involve in the process arylcyclopropanes having both donor and acceptor substituents in the aromatic ring. Nauka/Interperiodica 2007.
Alkene Synthesis by Photo-Wolff-Kischner Reaction of Sulfur Ylides and N-Tosylhydrazones
Gao, Pan-Pan,Yan, Dong-Mei,Bi, Ming-Hang,Jiang, Min,Xiao, Wen-Jing,Chen, Jia-Rong
supporting information, p. 14195 - 14201 (2021/09/20)
A visible-light-driven and room temperature photo-Wolff-Kischner reaction of sulfur ylides and N-tosylhydrazones has been developed for the first time to provide modular access to alkene synthesis. The high functional group tolerance and broad substrate scope were demonstrated by more than 60 examples. Both E- and Z-olefinic stereochemistry in the products could be controlled with excellent stereoselectivity. A series of mechanistic studies support that the reaction should proceed through a radical-carbanion crossover pathway, specifically involving addition of photo-generated sulfur ylide radical cations to N-tosylhydrazones to form carbanions and subsequent Wolff-Kischner process.
Palladium schiff base complex immobilized on magnetic nanoparticles: An efficient and recyclable catalyst for Mizoroki and Matsuda-Heck coupling
Vibhute, Sandip P.,Mhaldar, Pradeep M.,Shejwal, Rajendra V.,Rashinkar, Gajanan S.,Pore, Dattaprasad M.
supporting information, (2020/03/23)
The present work elucidates the catalytic efficiency of palladium Schiff base complex immobilized on amine functionalized magnetic nanoparticles for Heck coupling of structurally different aryl halide/arenediazonium tetrafluoroborate with styrene/acrylate/acrylonitrile. Matsuda-Heck coupling proceeds in aqueous media at room temperature whereas Mizoroki-Heck coupling was carried out at 80 °C. Both reactions were successfully furnished with low catalyst loading. The catalyst was easily separated from reaction mixture and reused up to six times without significant loss of catalytic activity.
