Acid-Free Silver-Catalyzed Cross-Dehydrogenative Carbamoylation of Pyridines with Formamides
作者:Wei Han、Fengli Jin、Qian Zhao、Hongyan Du、Lifang Yao
DOI:10.1055/s-0035-1561975
日期:——
have the apparent advantages over N-protected derivatives as synthetic building blocks. However, no practical methods have been developed for direct synthesis of this compound class from unfunctionalized pyridines. We herein present a general, safe, concise, acid-free, and highly selective method for the C2-carbamoylation of pyridines with unprotected formamide and N-methyl formamide through the cleavage
主要的吡啶基甲酰胺是生物活性分子中普遍存在的母体结构,与作为合成结构单元的 N 保护衍生物相比具有明显的优势。然而,尚未开发出从非官能化吡啶直接合成此类化合物的实用方法。我们在此提出了一种通用、安全、简洁、无酸和高选择性的方法,用于通过裂解两个 C-H 键,用未保护的甲酰胺和 N-甲基甲酰胺对吡啶进行 C2-氨基甲酰化。