Nucleophilic ring-opening reaction of benzoxazinones—access to o-amino-2,2,2-trifluoroacetophenones
作者:Nadine Allendörfer、Mazen Es-Sayed、Martin Nieger、Stefan Bräse
DOI:10.1016/j.tetlet.2011.11.014
日期:2012.1
We herein report a new synthetic access to o-amino-2,2,2-trifluoroacetophenones starting from commercially available o-amino benzoic acids, which can easily be converted into the corresponding benzoxazinones. In a second step the trifluoromethylated ketone is formed via addition of Ruppert’s reagent following acidic work up.
有机氟化合物在现代药物发现和材料科学中备受关注。我们在本文中报道了从商业上可获得的邻氨基苯甲酸开始的对o-氨基-2,2,2-三氟苯乙酮的新的合成途径,其可以容易地转化为相应的苯并恶嗪酮。在第二步骤中,在酸性处理后,通过添加Ruppert's试剂形成三氟甲基化的酮。