Amide synthesis <i>via</i> nickel-catalysed reductive aminocarbonylation of aryl halides with nitroarenes
作者:Chi Wai Cheung、Marten Leendert Ploeger、Xile Hu
DOI:10.1039/c7sc03950f
日期:——
Aminocarbonylation of arylhalides is one of the most useful methods in amide synthesis, but nitroarenes have not been used as a nitrogen source in this method even though they are more economical and accessible than anilines. Reported here is the development of nickel catalysis for the first three-component reactions of arylhalides, Co2(CO)8, and nitroarenes under reductive conditions to produce aryl amides. A
One-pot preparation of 2,5-disubstituted and 2,4,5-trisubstituted oxazoles from aromatic ketones with molecular iodine, oxone, and trifluoromethanesulfonic acid in nitriles
Alkyl aryl ketones were successfully converted into the corresponding 2,5-disubstituted and 2,4,5-trisubstituted oxazoles in good to moderate yields in a one-pot manner, utilizing iodine, Oxone®, and trifluoromethanesulfonic acid in nitriles under transition-metal-free conditions. The present method could be used for the preparation of Oxaprozin from benzyl phenyl ketone and succinonitrile. A possible
Iodoarene-Mediated One-Pot Preparation of 2,4,5-Trisubstituted Oxazoles from Ketones
作者:Hideo Togo、Yuhta Kawano
DOI:10.1055/s-2007-1000871
日期:2008.1
2-Methyl-5-aryloxazole and 2-ethyl-5-aryloxazole derivatives were smoothly and efficiently obtained in one-pot manner fromalkyl aryl ketones with iodoarene, m-chloroperbenzoic acid, and trifluoromethanesulfonic acid in acetonitrile and propionitrile, respectively. In these reactions, iodoarene works as a catalyst.
Iodoarene-catalyzed one-pot preparation of 2,4,5-trisubstituted oxazoles from alkyl aryl ketones with mCPBA in nitriles
作者:Yuhta Kawano、Hideo Togo
DOI:10.1016/j.tet.2009.05.003
日期:2009.8
aryliodonium I(III) species reacts with alkylaryl ketone to form β-keto aryliodonium species. This in turn, reacts with nitrile to form the corresponding oxazole. Iodoarene works as a catalyst. However, one equivalent of iodoarene is required because one equivalent of reactive aryliodonium I(III) species must be formed prior to the reaction with alkylaryl ketone. Then, by introducing an ionic liquid