The visible-light photoredox/[Co(III)] cocatalyzed dehydrogenative functionalization of cyclic and acyclic styrylderivatives with carboxylic acids is documented. The methodology enables the chemo- and regioselective allylic functionalization of styrylcompounds, leading to allylic carboxylates (32 examples) under stoichiometric acceptorless conditions. Intermolecular as well as intramolecular variants
functionalization of styryl carbon-carbon double bonds with triflamide is described viadual visible-light photoredox/cobaloxime catalysis. A range of allylictriflamides (20 examples) were isolated in moderate to good yields (up to 88%) under stoichiometric acceptorless conditions. Dedicated labelling, as well as spectroscopic experiments, enabled to shed light on the concatenated photo- and chemo-catalytic cycles
FeCl<sub>3</sub>/NaI-Catalyzed Allylic C–H Oxidation of Arylalkenes with a Catalytic Amount of Disulfide under Air
作者:Deshun Huang、Haining Wang、Fazhen Xue、Yian Shi
DOI:10.1021/jo201122s
日期:2011.9.2
This paper describes a FeCl3/NaI-catalyzed formal allylic C-H oxidation of arylalkenes using a catalytic amount of disulfide with BnOH and 4-nitroaniline as nucleophiles and air as oxidant to form the corresponding allyl ethers and amines. A possible reaction mechanism has been proposed.