Oxidative rearrangement of indoles is an important transformation to yield 2-oxindoles and spirooxindoles, which are present in many pharmaceutical agents and bioactive natural products. Previous oxidation methods show either broad applicability or greenness but rarely achieve both. Reported is the discovery of Fenton chemistry-enabled green catalytic oxidative rearrangement of indoles, which has wide substrate
Enantioselective Steglich Rearrangement of Oxindole Derivatives by Easily Accessible Chiral <i>N</i>,<i>N</i>-4-(Dimethylamino)pyridine Derivatives
作者:Hiroki Mandai、Takuma Fujiwara、Katsuaki Noda、Kazuki Fujii、Koichi Mitsudo、Toshinobu Korenaga、Seiji Suga
DOI:10.1021/acs.orglett.5b02089
日期:2015.9.18
Chiral N,N-4-(dimethylamino)pyridine (DMAP) derivatives, which can be readily prepared by the Ugi multicomponent reaction in a one-pot manner, have been efficiently applied to the enantioselective Steglich rearrangement of oxindole derivatives to give the desired products bearing a quaternary carbon center in high yield (>98% yield) and with high enantioselectivity (up to 99:1 er).
Direct N-Carbamoylation of 3-Monosubstituted Oxindoles with Alkyl Imidazole Carboxylates
作者:Barry M. Trost、Yong Zhang、Ting Zhang
DOI:10.1021/jo900760r
日期:2009.7.17
Regioselective N-carbamoylation of oxindoles was achieved through the use of imidazole carboxylate reagents. This reaction provides ready access to N-carbamoyl-3-monosubstituted oxindoles.