Fast Nitroaldol Reaction Using Powdered KOH in Dry Media
作者:Roberto Ballini、Giovanna Bosica、Mauro Parrini
DOI:10.1246/cl.1999.1105
日期:1999.10
β-Nitroalkanols are easily obtained within a few minutes, through the nitroaldol (Henry) reaction, catalyzed by a stoichiometric amount of powdered potassium hydroxide, in dry media. Satisfactory to excellent yields are obtained both with primary and secondary nitrocompounds, either with aromatic or aliphatic aldehydes.
Indium-Mediated Debromination of gem-Bromonitroalkanes under Mild Conditions in Aqueous Medium
作者:Raquel Soengas、Artur Silva、Rita Acúrcio
DOI:10.1055/s-0033-1339030
日期:——
-Bromonitroalkanes are efficiently reduced into the corresponding dehalogenated products in excellent yields with indium metal in the presence of a palladium(0) catalyst and indium(III) chloride in aqueous medium. The addition of bromonitromethane to carbohydrate-derived aldehydes or imines, followed by debromination of the intermediate bromonitro compounds represents an extremely efficient method for the
Efficient Addition Reaction of Bromonitromethane to Aldehydes Catalyzed by NaI: A New Route to 1-Bromo-1-nitroalkan-2-ols under Very Mild Conditions
作者:José M. Concellón、Humberto Rodríguez-Solla、Carmen Concellón、Santiago García-Granda、M. Rosario Díaz
DOI:10.1021/ol062451f
日期:2006.12.1
[Structure: see text] A catalytic NaI-mediated novel synthesis of 1-bromo-1-nitroalkan-2-ols was carried out by reaction of bromonitromethane with a variety of aldehydes, under very mildconditions. When the reaction was performed with chiral N,N-dibenzyl alaninal, the corresponding enantiopure (1S,2S,3S)-3-dibenzylamino-1-bromo-1-nitrobutan-2-ol was obtained with good stereoselectivity. The structure
A catalytic highly enantioselective direct synthesis of 2-bromo-2-nitroalkan-1-ols through a Henry reaction
作者:Gonzalo Blay、Victor Hernández-Olmos、José R. Pedro
DOI:10.1039/b809739a
日期:——
Highly enantiomerically enriched 2-bromo-2-nitroalkan-1-ols are prepared by direct condensation of aliphatic and aromatic aldehydes with bromonitromethane in the presence of a catalytic amount of copper(II) acetate and a C1-symmetric camphor-derived amino pyridine ligand.