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
我们开发了一种有效且新颖的方案,可从叔丁基异氰化物和炔基羧酸合成2-炔基恶唑。该方法允许在温和的反应条件下合成各种功能化的恶唑,并且操作简便,并且这些功能化的恶唑显示出一定程度的生物活性。此外,化合物2b,2h,2k,2n,2p和2t在人胃癌细胞(MGC803)和人膀胱肿瘤细胞(T24)中表现出良好的抗癌活性,IC50低于20.0μM。