Iridium(I)-Catalyzed Direct CH Bond Alkylation of the C-7 Position of Indolines with Alkenes
作者:Shiguang Pan、Naoto Ryu、Takanori Shibata
DOI:10.1002/adsc.201300917
日期:2014.3.24
A cationic iridium‐catalyzed C‐7 alkylation of N‐substituted indoline derivatives with various alkenes has been developed. A variety of 7‐alkylindolines were obtained in moderate to high yields. This protocol relies on the use of the carbonyl group on the nitrogen atom of indoline as a directing group and it is potentially applicable to the large‐scale synthesis of 7‐alkylindoles.
An efficient method for C7‐position‐selective alkenylation of N‐substituted indolines with alkenes is reported. Various 7‐alkenylindolines were obtained in moderate to excellent yields in air in the presence of catalytic amounts of [Cp*IrCl2]2, AgOTf, and Cu(OAc)2. The protocol relies on the use of a carbonyl or carbamoyl group on the nitrogen atom of indoline as a directing group and is potentially
kinetic resolution of 2-substituted indoline derivatives was achieved by hydrogentransfer to imines by means of a chiral phosphoric acid catalyst. The oxidative kinetic resolution was applicable to racemic alkyl- or aryl-substituted indolines, and the remaining indolines were obtained in good yields with excellent enantioselectivities.
Bi(OTf) 3 -mediated intramolecular hydroamination of 2-aminostilbenes for the synthesis of 2-arylindolines
作者:So Won Youn、Su San Jang、So Ra Lee
DOI:10.1016/j.tet.2016.06.063
日期:2016.8
An efficient Bi(OTf)(3)-mediated intramolecular hydroamination of 2-aminostilbenes for the synthesis of various 2-arylindolines has been developed. Various advantages using Bi(OTf)(3) as a catalyst, such as the operationally easy, simple, and safe procedure, good to excellent chemical yields, and the use of relatively low catalyst loading are noteworthy. (C) 2016 Elsevier Ltd. All rights reserved.
Iridium-Catalyzed Asymmetric Hydrogenation of N-Protected Indoles