Pentanidium–Catalyzed Enantioselective α-Hydroxylation of Oxindoles Using Molecular Oxygen
作者:Yuanyong Yang、Farhana Moinodeen、Willy Chin、Ting Ma、Zhiyong Jiang、Choon-Hong Tan
DOI:10.1021/ol302030v
日期:2012.9.21
Pentanidium-catalyzed alpha-hydroxylation of 3-substituted-2-oxindoles using molecular oxygen has been developed with good yields and enantioselectivities. This reaction does not require an additional reductant such as triethyl phosphite, which was typically added to reduce the peroxide intermediate. The reaction was demonstrated to consist of two-steps: an enantioselective formation of hydroperoxide oxindole and a kinetic resolution of the hydroperoxicle oxindole via reduction with enolates generated from the oxindoles.
SAITO, ISAO;NAKAGAWA, HIDEKI;KUO, YUEH-HSIUNG;OBATA, KEIICHI;MATSUURA, TE+, J. AMER. CHEM. SOC., 1985, 107, N 18, 5279-5280
Utilisation de (CH 3 ) 3 SiCN comme reactif d'interceptions des intermediaires peroxydes dans le cas de la photooxygenation de derives de l'indole, du methoxymethylene-2 adamantane et du methyl-1 pyrrole
利用 (CH 3 ) 3 SiCN comme reactif d'interceptions des intermediaires dans le cas de la photooxygenation de衍生的吲哚、二甲氧基亚甲基-2金刚烷和二甲基-1吡咯