Aerobic, Metal-Free, and Catalytic Dehydrogenative Coupling of Heterocycles: En Route to Hedgehog Signaling Pathway Inhibitors
摘要:
The nitrosonium ion-catalyzed dehydrogenative coupling of heteroarenes under mild reaction conditions is reported. The developed method utilizes ambient molecular oxygen as a terminal oxidant, and only water is produced as byproduct. Dehydrogenative coupling of heteroarenes translated into the rapid discovery of novel hedgehog signaling pathway inhibitors, emphasizing the importance of the developed methodology.
Stereoselective Palladium-Catalyzed Carboaminoxylations of Indoles with Arylboronic Acids and TEMPO
作者:Sylvia Kirchberg、Roland Fröhlich、Armido Studer
DOI:10.1002/anie.200901072
日期:2009.5.25
Indoles are not indolent: Various indoles react with arylboronic acids chemodivergently. CH arylation of free indole and N‐methylindole gives the corresponding C(2)‐arylated indoles A whereas N‐acylated, N‐benzoylated, and N‐Boc‐protected indoles provide the corresponding arylcarboaminoxylated products B with excellent diastereoselectivity in good to excellent yields.
“On Water” Direct and Site-Selective Pd-Catalysed CH Arylation of (NH)-Indoles
作者:Lionel Joucla、Nelly Batail、Laurent Djakovitch
DOI:10.1002/adsc.201000512
日期:2010.11.22
communication describes the development of a versatile catalytic system based on palladium(II) acetate/bis(diphenylphosphino)methane [Pd(OAc)2/dppm] that works “on water” giving site-selective CH arylation of (NH)-indoles without protecting or directing groups. Remarkably, the control of regioselectivity was achieved by small changes in the “extra-catalytic” base/halide partners. These innovative methodologies
Palladium-Catalyzed Direct
C-3 Arylations of Indoles with an Air-Stable HASPO
作者:Lutz Ackermann、Sebastian Barfüßer
DOI:10.1055/s-0028-1087951
日期:——
Efficient directarylations of indoles occurred highly regioselectively at position C-3 with an in situ generated palladium complex derived from an air-stable HASPO, which enabled syntheses of diversely functionalized indoles, also with sterically hindered substrates.
A novel palladium‐catalyzed approach to direct C‐3‐arylation of 1H‐indoles with arylhydrazines using air as the oxidant viaCN bond cleavage has been developed. Various substituents are tolerated in this system in moderate to good yields. This reaction could also be compatible with a larger scale. Thus, this strategy using arylhydrazines as arylating reagents provides a powerful method for constructing
申请人:SOCIETE DE CONSEILS DE RECHERCHES ET D'APPLICATIONS SCIENTIFIQUES SAS
公开号:WO1999065898A1
公开(公告)日:1999-12-23
(EN) The present invention is directed to imidazolyl derivatives of formula (II), wherein the variables are defined in the specification, which are useful as prenyl transferase inhibitors.(FR) Cette invention se rapporte à des dérivés d'imidazolyle, représentés par la formule (II), où les variables sont définies dans les pièces descriptives de l'invention, ces dérivés étant utiles comme inhibiteurs de prényl-transférases.