microwave irradiation via in situ formation of 2H-azirine intermediates. An interesting reaction is described wherein, with trifluoroacetic acid at lower temperature, it affords highly substituted 2-(trifluoromethyl)oxazoles. These flexible transformations proceed under solvent free conditions in good to excellent yields without any catalyst.
已经研究了α-
叠氮hal烷与
羧酸的反应,该反应在微波辐射下通过原位形成2H-
叠氮中间体形成了α-
氨基-1,3-二
酮。描述了一种有趣的反应,其中在较低温度下与
三氟乙酸反应,可得到高度取代的2-(三
氟甲基)
恶唑。这些灵活的转化过程在无溶剂条件下以良好至极好的收率进行,没有任何
催化剂。