Aza-oxindole synthesis by oxidative coupling of Csp2–H and Csp3–H centers
作者:Chandan Dey、E. Peter Kündig
DOI:10.1039/c2cc17871k
日期:——
A Cu(II) mediated oxidative Csp2âH and Csp3âH coupling protocol gives access to aza-oxindoles in good to excellent yield in the presence of NaOtBu as base and toluene as solvent.
Copper(ii) chloride mediated (aza)oxindole synthesis by oxidative coupling of Csp2–H and Csp3–H centers: substrate scope and DFT study
作者:Chandan Dey、Evgeny Larionov、E. Peter Kündig
DOI:10.1039/c3ob41254g
日期:——
an amidyl radical by one electron oxidation of amide enolate followed by an intramolecular radical cyclization reaction (homolytic aromatic substitution reaction). A detailed DFT study shows that the cyclization of the amidyl radical is the rate-limiting step in the oxindole synthesis, whereas the second single electron transfer (SET) becomes the rate-determining step in the aza-oxindole formation