Herein the first example of electrochemically enabled, NiCl2-catalyzed reductive decarboxylative coupling of N-hydroxyphthalimide (NHP) esters with quinoxalinones is reported. A range of primary, secondary, tertiary aliphatic carboxylic acids and amino acid-derived esters were tolerated well. This decarboxylative coupling allows access to structurally diverse 3-alkylated quinoxalinones in up to 91%
An Upstream By-product from Ester Activation via NHC-Catalysis Catalyzes Downstream Sulfonyl Migration Reaction
作者:Runfeng Han、Liwenze He、Lin Liu、Xingang Xie、Xuegong She
DOI:10.1002/asia.201500959
日期:2016.1
A sequential reaction combining N‐heterocyclic carbene (NHC) and N‐hydroxyphthalimide (NHPI) catalysis allowed for the upstream by‐product NHPI, which was generated in the NHC‐catalyzed cycloaddition reaction, to act as the catalyst for a downstream nitrogen‐to‐carbon sulfonylmigrationreaction. Enantiomeric excess of the major product in the cycloaddition reaction remained intact in the follow‐up
Porous coordination polymers were used as photocatalysts, combining photocatalysis and copper catalysis to realize decarboxylative radical cyanation reactions.