DABO Boronate Promoted Conjugate Allylation of α,β-Unsaturated Aldehydes Using Copper(II) Catalysis
作者:Pjotr C. Roest、Nicholas W. M. Michel、Robert A. Batey
DOI:10.1021/acs.joc.6b00782
日期:2016.8.5
method for the selective 1,4-conjugate allylation of α,β-unsaturated aldehydes is reported. The method employs an air-stable diethanolamine-complexed boronic acid (DABO boronate) as the allyl transfer reagent and promotes conjugate addition over 1,2-addition. A variety of aryl- and alkyl-substituted enals are tolerated, providing δ,ε-unsaturated aldehyde products in good yields and selectivities under mild
Indium-Mediated Synthesis of Homoallyl Alcohols in the Aqueous Phase
作者:Zhengyin Du、Yanchun Li、Fen Wang、Wanwei Zhou、Jin-Xian Wang
DOI:10.1080/00397911.2010.492072
日期:2011.5.3
[image omitted] The indium-mediated Barbier-type allylation reaction of aldehydes with allyl bromide, which gives corresponding homoallyl alcohols, was investigated. The reaction medium and the effects of substituents were discussed in detail. The results showed that various aldehydes, including aromatic, heterocyclic, and aliphatic aldehydes, with different substituents could all react well with excellent yields of 91-97% in aqueous tetrahydrofuran at room temperature within about 1h.