Transition Metal-Free Intermolecular C(sp<sup>2</sup>)–H Direct Amination of Furanones via a Redox Pathway
作者:Qiang Wei、Junfeng Wang、Eman A. Akam、Dawei Yin、Zemei Ge、Tieming Cheng、Xin Wang、Anna-Liisa Brownell、Runtao Li
DOI:10.1021/acs.joc.8b02760
日期:2019.2.1
A direct C(sp2)–Hamination of 2-furanones under metal-free conditions was realized. This unprecedented intermolecular C–H to C–N conversion provides rapid access to 4-amino-furanone derivatives and novel aza-heterocycle fused furanone skeletons. A redox mechanism based on a double-Michael-addition intermediate INT2 is proposed and detected by spectrometry.
Methyl 4-aryl-1,4,5,7-tetrahydro-2,7,7-trimethyl-5-oxo-6H-pyrrolo-[4,3-b]pyridine-3-carboxylates and methyl 1,4,5,7-tetrahydro-3-methyl-7-oxo-4-phenylfuro[3,4-b]pyridine-3-carboxylate were synthesized. Attempting synthesis of methyl 4-aryl-1,3,5,7a-tetrahydro-1,1,6-trimethyl-3-oxofuro[3,4-c]-pyridine-7-carboxylates failed.