666743-33-5Relevant academic research and scientific papers
Microwave-assisted reaction of aryl diazonium fluoroborate and diaryl dichalcogenides in dimethyl carbonate: A general procedure for the synthesis of unsymmetrical diaryl chalcogenides
Kundu, Debasish,Ahammed, Sabir,Ranu, Brindaban C.
experimental part, p. 2024 - 2030 (2012/07/17)
A convenient, general and efficient procedure for the synthesis of unsymmetrical diaryl chalcogenides has been developed by the reaction of aryl diazonium fluoroborates and diaryl dichalcogenides in the presence of zinc dust in dimethyl carbonate under microwave irradiation. The reactions of a wide range of substituted aryl diazonium fluoroborates and diaryl dichalcogenides have been addressed. The zinc dust is required for the cleavage of diaryl dichalcogenides. The products are obtained in high purity after fast column chromatography of the crude residue after evaporation of dimethyl carbonate. The Royal Society of Chemistry 2012.
CuO nanoparticles: an efficient and recyclable catalyst for cross-coupling reactions of organic diselenides with aryl boronic acids
Alves, Diego,Santos, Cayane G.,Paix?o, Márcio W.,Soares, Letiére C.,Souza, Diego de,Rodrigues, Oscar E.D.,Braga, Ant?nio L.
scheme or table, p. 6635 - 6638 (2010/03/01)
We present here an efficient and ligand-free cross-coupling reaction of organic diselenides with aryl boronic acids using a catalytic amount of CuO nanoparticles in DMSO at 100 °C under air atmosphere. This is a general cross-coupling reaction and was performed with organic diselenides and aryl boronic acids bearing electron-withdrawing and electron-donating groups affording the corresponding selenides in good to excellent yields. The CuO nanoparticles can be easily recovered and utilized for further catalytic reactions.
Enantiomerically pure organoseleno-1-arylethanols by enzymatic resolution with Candida antarctica lipase: Novozym 435
Omori, Alvaro T.,Assis, Leonardo F.,Andrade, Leandro H.,Comasseto, Joao V.,Porto, Andre L.M.
, p. 1048 - 1053 (2008/02/08)
Racemic organoseleno-1-arylethanols were prepared by ortho-lithiation of arylethanols, followed by sequential reaction with elemental selenium and alkyl halides and by reaction of either aryldiazonium chlorides with diphenyldiselenide or with lithium and
Preparation of chiral organochalcogeno-α-methylbenzyl alcohols via biocatalysis. The role of Daucus carota root
Comasseto, Jo?o V.,Omori, álvaro T.,Porto, André L. M.,Andrade, Leandro H.
, p. 473 - 476 (2007/10/03)
A series of organochalcogeno acetophenones 3 has been submitted to the action of enzymes from Daucus carota root. Some of the chalcogeno ketones tested afforded the chiral organochalcogeno-α-methylbenzyl alcohols 4 in excellent enantiomeric excesses (>99%), under mild and environmentally friendly conditions. The stereoselectivity of the reduction is in accordance with Prelog's rule. Enzymatic kinetic resolution as alternative process was used to obtain the chiral ortho-organochalcogeno-α-methylbenzyl alcohols in excellent enantiomeric excess (>99%).
