Sonogashira Cross-Coupling Reactions
and Construction of the Indole Ring System Using a Robust, Silica-Supported
Palladium Catalyst
作者:Elizabeth Tyrrell、Leon Whiteman、Neil Williams
DOI:10.1055/s-0028-1083375
日期:——
The use of a recyclable silica-supported palladium catalyst in Sonogashira couplings and indole syntheses using a range of functionalised substrates is described. The catalyst is shown to be both robust and versatile, effecting the synthesis of 2-phenylindole in quantitative yield without the need for N-protection, a copper cocatalyst, a base, or a solvent.
Palladium-catalysed coupling of aryl and vinyl triflates or halides with 2-ethynylaniline: An efficient route to functionalized 2-substituted indoles
作者:A. Arcadi、S. Cacchi、F. Marinelli
DOI:10.1016/s0040-4039(01)80456-1
日期:1989.1
vinyl triflates or halides with the easily available 2-ethynylaniline, followed by a palladium(II)-catalysed cyclization step, provides an efficient and very versatile procedure for the synthesis of functionalyzed 2-substitutedindoles.
The cyclization of 2-alkynylanilines in the presence of PdCl2 and nBu4NCl under an acidic CH2Cl2-HCl two-phase system affords 2-substitutedindoles in good to high yield, at room temperature. The reaction is particularly suited to the one-flask preparation of 2-substitutedindoles from 2-ethynylaniline.
在酸性CH 2 Cl 2 -HCl两相系统中,在PdCl 2和n Bu 4 NCl存在下,将2-炔基苯胺环化,可以在室温下以高收率或高收率得到2-取代的吲哚。该反应特别适合由2-乙炔基苯胺单瓶制备2-取代的吲哚。