Versatile One-Step One-Pot Direct Aldol Condensation Promoted by MgI2
作者:Han-Xun Wei、Kunyu Li、Qian Zhang、Richard L. Jasoni、Jiali Hu、Paul W. Paré
DOI:10.1002/hlca.200490211
日期:2004.9
A true one-stepone-pot aldol-reaction procedure has been developed for the synthesis of β-hydroxy ketones and esters. The reaction can be run at room temperature by simply mixing four components in CH2Cl2, with medium-to-high yields of aldol products obtained after regular workup. Mechanistically, the process probably proceeds via Mg-enolate formation of the ketone or ester component, followed by
Catalytic Hydrogenation of α,β-Epoxy Ketones to Form β-Hydroxy Ketones Mediated by an NADH Coenzyme Model
作者:Hua-Jian Xu、You-Cheng Liu、Yao Fu、Yun-Dong Wu
DOI:10.1021/ol0610892
日期:2006.8.1
The hydrogenation of alpha,beta-epoxy ketones can be mediated by a catalytic amount of BNAH or BNA(+) Br- to form corresponding,beta-hydroxy ketones in high yield. Na2S2O4 is used as the reducing agent to convert BNA(+) Br- to BNAH. A radical mechanism has been proposed to understand many observations of this catalytic reaction.