Palladium-Catalyzed Imidoylative Cyclization of α-Isocyanoacetamides: Efficient Access to C2-Diversified Oxazoles
作者:Jian Wang、Shuang Luo、Jinbo Huang、Tingting Mao、Qiang Zhu
DOI:10.1002/chem.201403033
日期:2014.8.25
A novel procedure for the synthesis of C2‐diversified oxazoles, through palladium‐catalyzed imidoylative cyclization of α‐isocyanoacetamides with aryl, vinyl, alkynyl halides, or triflates, was developed. Migratory insertion of isocyanide into a C‐palladium(II) intermediate in a cascade process was also realized, generating alkyl‐substituted oxazoles. Therefore, oxazoles functionalized at the C2 position
通过钯催化α-异氰基乙酰胺与芳基,乙烯基,炔基卤化物或三氟甲磺酸酯的亚胺基化环化反应,开发了一种新颖的合成C2恶唑的方法。还实现了在级联过程中将异氰酸酯迁移插入C-钯(II)中间体中,生成烷基取代的恶唑。因此,可通过应用此方法获得在C2位置被sp,sp 2和sp 3杂化的碳原子官能化的恶唑。