A direct synthesis of carbaldehydes through intramoleculardehydrogenativeaminooxygenation has been developed. The process uses a catalytic amount of copper(II) in DMF or DMA under oxygen and does not require additional oxidants (see scheme). Mechanistic studies suggest that the carbonyl oxygen atom of the aldehyde is derived from oxygen through a copper‐mediated oxygen activation process via a peroxy–copper(III)
Electrochemically Enabled Direct C3‐Formylation of Imidazopyridines with Me
<sub>3</sub>
N as a Carbonyl Source
作者:Zhicong Tang、Gang Hong、Shiyun Sun、Limin Wang
DOI:10.1002/asia.202300001
日期:——
A metal- and oxidant-free electrochemical methodology for C-3 formylation of imidazopyridines using trimethylamine as a one-carbon source has been established. The strategy demonstrated good functional-group tolerance and could be scaled up to gram scale, ensuring late-stage functionalization and total/formal synthesis of pharmaceutical molecules. Furthermore, unexpected hexafluoroisopropoxylation