palladium‐catalyzed oxidative bis‐alkoxycarbonylation reaction of olefins. The most active catalyst was formed in situ from bis(9‐anthryl)‐2,3‐dimethyl‐1,4‐diazabutadiene and palladium(II) trifluoroacetate [Pd(TFA)2]. This catalytic system was able to selectively convert olefins into succinicdiesters in good yields (up to 97%) and low catalyst loading (up to 0.5 mol%) under mild reaction conditions [4 bar
Oxidative 1, 2-aryl migration of alky aryl ketones (2, 5, and 8) to 2-arylalkanoates (3, 6, and 9) was effected by using diacetoxyphenyliodine (1). The migration was successfully applied to the preparation of the antiinflammatory agents ibuprofen (15) and clidanac (17).
a straightforward approach to access 1,4-dicarboxylic acid diesters via BiPyPhos-enabled cobalt-catalyzed bis-alkoxycarbonylation of alkynes. This strategy utilizes an earth-abundant and cost-efficient cobalt catalyst, free from acid additives or noble metalcatalysts. The bifunctional ligand BiPyPhos plays a crucial character in both the rate-determining step and the stability of the cobalt catalytic