Fe(II)-Catalyzed Amination of Aromatic C−H Bonds via Ring Opening of 2<i>H</i>-Azirines: Synthesis of 2,3-Disubstituted Indoles
作者:Samaresh Jana、Mack D. Clements、Barry K. Sharp、Nan Zheng
DOI:10.1021/ol101130e
日期:2010.9.3
A general method for the synthesis of 2,3-disubstituted indoles is described. The key feature of this method is the amination of aromatic C−H bonds via FeCl2-catalyzed ring opening of 2H-azirines. The method tolerates a variety of functional groups such as Br, F, NO2, OMe, CF3, OTBS, alkenes, and OPiv. The method can also be extended to synthesize azaindoles.
Palladium catalyzed indolization of 2-bromo or chloroanilines
申请人:Li Guisheng
公开号:US20050209465A1
公开(公告)日:2005-09-22
The present invention provides a method for making substituted indole compounds of general formula III comprising the step of:
(a) reacting a 2-bromoaniline or 2-chloroaniline of general formula (I)
(I)
wherein: X, R and R
1
are defined herein
with a substituted acetylene of formula (II)
wherein R
2
and R
3
in the presence of a palladium catalyst, a ligand, and a base in a solvent at a suitable temperature to give a compound of formula (III);
The First Regioselective Palladium-Catalyzed Indolization of 2-Bromo- or 2-Chloroanilines with Internal Alkynes: A New Approach to 2,3-Disubstituted Indoles
作者:Ming Shen、Guisheng Li、Bruce Z. Lu、Azad Hossain、Frank Roschangar、Vittorio Farina、Chris H. Senanayake
DOI:10.1021/ol048114t
日期:2004.10.1
The first practical and economical process for synthesis of 2,3-disubstituted indole compounds has been developed with high regioselectivity by palladium-catalyzed indolization of 2-bromo- or chloroanilines and their derivatives with internal alkynes.
PALLADIUM CATALYZED INDOLIZATION OF 2-BROMO OR CHLOROANILINES