Organocatalytic, Asymmetric Synthesis of 3-Sulfenylated<i>N</i>-Boc-Protected Oxindoles
作者:Chuan Wang、Xuena Yang、Charles C. J. Loh、Gerhard Raabe、Dieter Enders
DOI:10.1002/chem.201201262
日期:2012.9.10
Sulfenylated oxindoles: The first asymmetric sulfenylation of N-Boc-protected oxindoles has been developed to provide products containing a tetrasubstituted stereogenic center in high to excellent yields (86-98 %) and, in most cases, excellent enantioselectivities (up to 96 % ee; see scheme).