作者:Nadine V. Hanhan、Aziza H. Sahin、Toby W. Chang、James C. Fettinger、Annaliese K. Franz
DOI:10.1002/anie.200904393
日期:2010.1.18
used to catalyze the addition of indoles and other π nucleophiles to N‐alkylated and unprotected isatins (see picture). The resulting biologically relevant substituted 3‐hydroxy‐2‐oxindoles were obtained in high yield with high enantioselectivity. Tf=trifluoromethanesulfonyl.
不再遇到双重麻烦:当使用手性scan(III)和铟(III)络合物催化吲哚和其他π亲核试剂向N烷基化和未保护的靛红加成时,竞争性双重加成途径得到抑制(见图)。得到的具有生物意义的取代的3-羟基-2-氧吲哚以高收率和高对映选择性获得。Tf =三氟甲磺酰基。