Air-Stable Secondary Phosphine Oxide as Preligand for Palladium-Catalyzed Intramolecular α-Arylations with Chloroarenes
摘要:
A palladium catalyst derived from air-stable secondary phosphine oxide (1-Ad)(2)P(O)H enabled efficient intramolecular alpha-arylations of amides with aryl chlorides, which allowed for the synthesis of diversely substituted (aza)oxindoles.
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
Air-Stable Secondary Phosphine Oxide as Preligand for Palladium-Catalyzed Intramolecular α-Arylations with Chloroarenes
作者:Lutz Ackermann、Rubén Vicente、Nora Hofmann
DOI:10.1021/ol901597d
日期:2009.10.1
A palladium catalyst derived from air-stable secondary phosphine oxide (1-Ad)(2)P(O)H enabled efficient intramolecular alpha-arylations of amides with aryl chlorides, which allowed for the synthesis of diversely substituted (aza)oxindoles.