Facile synthesis of 2-alkynyl oxazoles <i>via</i> a Ce(OTf)<sub>3</sub>-catalyzed cascade reaction of alkynyl carboxylic acids with <i>tert</i>-butyl isocyanide
作者:Ming Cao、Qing-Hu Teng、Zhi-Wei Xi、Li-Qiu Liu、Ren-Yong Gu、Ying-Chun Wang
DOI:10.1039/c9ob02337b
日期:——
We developed an efficient and novel protocol to synthesize 2-alkynyl oxazoles from tert-butyl isocyanide and alkynyl carboxylic acids. This method allowed the synthesis of diversely functionalized oxazoles under mild reaction conditions, coupled with operational simplicity and these functionalized oxazoles showed a certain degree of biological activity. Moreover, compounds 2b, 2h, 2k, 2n, 2p and 2t