Synthesis of Imidazopyridines via Copper-Catalyzed, Formal Aza-[3 + 2] Cycloaddition Reaction of Pyridine Derivatives with α-Diazo Oxime Ethers
作者:Sangjune Park、Hyunseok Kim、Jeong-Yu Son、Kyusik Um、Sooho Lee、Yonghyeon Baek、Boram Seo、Phil Ho Lee
DOI:10.1021/acs.joc.7b01714
日期:2017.10.6
The Cu-catalyzed, formal aza-[3 + 2] cycloadditionreaction of pyridine derivatives with α-diazo oxime ethers in trifluoroethanol was used to synthesize imidazopyridines via the release of molecular nitrogen and elimination of alcohol. These methods enabled modular synthesis of a wide range of N-heterobicyclic compounds such as imidazopyridazines, imidazopyrimidines, and imidazopyrazines with an α-imino