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
A novel and direct synthesis of 2-alkyl-5-aryl disubstituted oxazoles
作者:Jong Chan Lee、Taiyoung Hong
DOI:10.1016/s0040-4039(97)10362-8
日期:1997.12
A direct and efficient method for the preparation of 2-alkyl-5-aryl disubstituted oxazoles was realized by reaction of aromatic alpha-methyl ketones with various aliphatic nitriles in the presence of Tl(OTf)(3). (C) 1997 Elsevier Science Ltd.
Iodoarene-mediated one-pot preparation of 2,5-disubstituted and 2,4,5-trisubstituted oxazoles from alkyl aryl ketones with oxone in nitriles
作者:Yoshihide Ishiwata、Hideo Togo
DOI:10.1016/j.tet.2009.09.109
日期:2009.12
aryliodonium I(III) species reacts with alkylaryl ketone to generate β-keto iodonium species. Then, β-keto iodonium species reacts with nitrile to produce the corresponding oxazole. In principle, iodoarene works as a catalyst. However, 1 equiv of iodoarene is required because 1 equiv of reactive aryliodonium I(III) species must be formed before the reaction with alkylaryl ketone.