Enantioselective conjugate addition of 3-fluoro-oxindoles to vinyl sulfone: an organocatalytic access to chiral 3-fluoro-3-substituted oxindoles
作者:Xiaowei Dou、Yixin Lu
DOI:10.1039/c3ob41267a
日期:——
An organocatalytic conjugate addition of prochiral 3-fluorinated oxindoles to vinyl sulfones was described for the first time. In the presence of bifunctional tertiary amine–thiourea catalysts, 3-fluoro-3-substituted oxindole adducts were obtained in excellent yields and with high enantiomeric excesses.
首次描述了手性3-氟代吲哚向乙烯基砜的有机催化共轭加成。在双官能叔胺-硫脲催化剂的存在下,以优异的收率和高的对映体过量获得了3-氟-3-取代的羟吲哚加合物。