34713-70-7Relevant articles and documents
Cleavage of immobilized disubstituted triazenes with electrophiles: Solid-phase synthesis of alkyl halides and esters
Pilot, Claudine,Dahmen, Stefan,Lauterwasser, Frank,Br?se, Stefan
, p. 9179 - 9181 (2001)
An efficient, selective cleavage of polymer-bound disubstituted triazenes with trimethylsilyl halides produces alkyl chlorides, bromides and iodides in good to excellent purities and yields. Similarly, alkyl esters are formed upon cleavage with carboxylic
Direct dichlorovinylation of some carbonyl compounds by trichloroethylene under conditions of phase-transfer catalysis
Jończyk, Andrzej,Gierczak, Agnieszka H
, p. 6083 - 6087 (2000)
Reaction of ketones 1 and 3 with trichloroethylene (TRI) carried out in the presence of 50% aq. NaOH and TBAHS as a catalyst, in ethyl ether (phase-transfer catalysis, PTC) afford 1,2-dichlorovinylated ketones 2 and 4, respectively in good yields, usually as mixtures of Z and E isomers. PTC reaction of aldehydes 5 with TRI, carried out with DMSO instead of TBAHS, yields O-dichlorovinylated products 6, as mixtures of isomers in the case of 6a. These products are formed via C- or O-addition of ambident enolate anions to dichloroacetylene (generated from TRI by a base) and fast protonation of highly basic dichlorovinyl anions thus formed. (C) 2000 Elsevier Science Ltd.
Rhodium complexes with a new chiral amino-phosphinite ligand and their behavior as pre-catalysts in the hydroformylation of styrene
Brancatelli,Drommi,Bruno,Faraone
, p. 215 - 219 (2010)
The new amino-phosphinite chiral ligand (Sa)-4-((S)-1-(diphenylphosphinooxy)-3-methylbutan-2-yl)-4,5- dihydro-3H-dinaphtho[2,1-c:1′,2′-e]azepine (1) has been synthesized and the corresponding more stable oxide has been characterized by X-ray an
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McKinney,M.A.,So,E.C.
, p. 2818 - 2822 (1972)
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Synthesis of rac-ɑ-aryl propionaldehydes via branched-selective hydroformylation of terminal arylalkenes using water-soluble Rh-PNP catalyst
Gao, Peng,Ke, Miaolin,Ru, Tong,Liang, Guanfeng,Chen, Fen-Er
, p. 830 - 834 (2021/08/26)
This work detailed the preparation of a class of water-soluble PNP ligands that differed by the nature of the substitute on phenyl ring of ligands. These ligands were incorporated into water-soluble rhodium-PNP complex catalysts that were used to regioselective hydroformylation of a series of terminal arylalkenes, providing efficient access to rac-α-aryl propionaldehydes in good to excellent yield (up to 97%) and branched-regioselectivity (up to 40:1 b/l ratio). Furthermore, gram-scale and diverse synthetic transformation demonstrated synthetic application of this methodology for non-steroidal antiinflammatory drugs.
A Low Rhodium Content Smart Catalyst for Hydrogenation and Hydroformylation Reactions
Paganelli, Stefano,Tassini, Riccardo,Rathod, Vikas D.,Onida, Barbara,Fiorilli, Sonia,Piccolo, Oreste
, p. 1508 - 1521 (2020/10/15)
Abstract: This paper describes the preparation, broad characterization and study of activity in hydrogenation and hydroformylation reactions of an easily produced 0.18% Rh/Al2O3. Analytical studies on fresh and recycled samples shed light on the smart properties of such catalyst. Results showed high activity as well as fine/excellent chemoselectivity or regioselectivity, characteristics that may suggest a wide range of applicability. Graphic Abstract: The low metal content catalyst 0.18% Rh/Al2O3 was very active in both hydrogenation and hydroformylation reactions so providing intermediates for valuable APIs, as Nabumetone and Eletriptan, and a fragrance with a fresh, green-floral smell, that recalls scent of lily of the valley.[Figure not available: see fulltext.]
