Pd(II)-bipyridine catalyzed conjugate addition of arylboronic acid to alpha,beta-unsaturated carbonyl compounds.
[Reaction: see text]. A Pd(II)-catalyzed conjugate addition of arylboronic acid to alpha,beta-unsaturated ketones, aldehydes, esters, etc. in the presence of 2,2'-bipyridine was developed. A mechanism involving transmetalation, insertion of the carbon-carbon double bond into the C-Pd bond, and protonolysis of the resulting C-Pd bond is proposed. The reaction conditions are mild and the yield is high. The presence of 2,2'-bipyridine is crucial for the reaction to inhibit beta-hydride elimination.
Lu
Xiyan
X
State Key Laboratory of Organometallic Chemistry, Shanghai Institute of Organic Chemistry, Chinese Academy of Sciences, 354 Fenglin Lu, Shanghai 200032, China. xylu@mail.sioc.ac.cn
Lin
Shaohui
S