The use of samarium or sodium iodide salts as an alternative for the aza-Henry reaction
作者:Humberto Rodríguez-Solla、Carmen Concellón、Noemí Alvaredo、Raquel G. Soengas
DOI:10.1016/j.tet.2011.12.061
日期:2012.2
A novel reaction of bromonitromethane with a variety of imines in very mild conditions promoted by SmI2 and NaI to afford nitroamines or bromonitroamines is described. When these reactions were performed on sugar-based imines, the corresponding nitroamines or bromonitroamines were obtained in high yields and from moderate to good stereoselectivities. Synthetic possibilities of nitroamines were also
描述了由SmI 2和NaI促进的在非常温和的条件下溴硝基甲烷与各种亚胺的新颖反应,以提供硝基胺或溴硝基胺。当对基于糖的亚胺进行这些反应时,以高收率和中等至良好的立体选择性获得了相应的硝胺或溴硝胺。硝基胺在室温下在吡咯烷存在下用SmI 2 / H 2 O还原也显示出合成的可能性。提出了这种新颖的氮杂-亨利反应的机理。
Indium-Mediated Aza-Henry Reaction of Imines: Access to 2-Nitroamines
作者:Raquel G. Soengas、Sandrina Silva、Amalia M. Estévez、Juan C. Estévez、Ramón J. Estévez、Humberto Rodríguez-Solla
DOI:10.1002/ejoc.201200304
日期:2012.8
A new method has been developed to obtain 2-nitroamines by an indium-promoted reaction of bromonitromethane with a variety of imines. On the strength of these results, the reaction was also performed with 2-bromo-2-nitropropanes to afford 2,2-dialkyl-2-nitroamines. Moreover, the indium-mediatedreaction of 1-bromo-1-nitroethane and imines afforded 1-methyl-2-nitroamines with remarkably high anti selectivity
One-Pot Three-Component Barbier-Type Reaction for the Synthesis of β-Nitroamines
作者:Raquel Soengas、Artur Silva
DOI:10.1055/s-0033-1339486
日期:——
The combination of an aldehyde, bromonitromethane, and p-methoxyaniline in the presence of tin(II) chloride and titanium tetraethoxide allows a straightforward access to β-nitroamine derivatives. The use of solid paraformaldehyde results in the amino methylation of methylnitronate. On the other hand, chiral sugar-derived aldehydes furnished the corresponding nitrosugars in high yields and stereoselectivities