Pd(II)-Bipyridine Catalyzed Conjugate Addition of Arylboronic Acid to α,β-Unsaturated Carbonyl Compounds
作者:Xiyan Lu、Shaohui Lin
DOI:10.1021/jo051561h
日期:2005.11.1
A Pd(II)-catalyzed conjugate addition of arylboronicacid to α,β-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
The reaction of poly(phenylmethylsiloxane) with α,β-unsaturated carbonylcompounds in the presence of aqueous K 2 CO 3 and 3 mol% of [Rh(OH)(cod)] 2 gives 1,4-conjugate addition product in good yields. Arylchlorosilanes also undergo the conjugate addition in excellent yields under similar conditions.
聚(苯基甲基硅氧烷)与 α,β-不饱和羰基化合物在 K 2 CO 3 水溶液和 3 mol% [Rh(OH)(cod)] 2 的存在下反应,以良好的产率得到 1,4-共轭加成产物. 芳基氯硅烷也在类似条件下以优异的产率进行共轭加成。
Chiral olefin–sulfoxide as ligands for rhodium-catalyzed asymmetric conjugate addition of arylboronic acids to unsaturated esters
作者:Feng Xue、Dongping Wang、Xincheng Li、Boshun Wan
DOI:10.1039/c3ob41342j
日期:——
An efficient rhodium/olefin–sulfoxide catalyzed asymmetricconjugate addition of organoboronic acids to various unsaturatedesters has been developed, where 2-methoxy-1-naphthyl sulfinyl functionalized olefin ligands have been shown to be highly effective, and are especially applicable to unsaturated methyl esters with up to 99% yield and 91% ee.