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。
ARCADI, A.;CACCHI, S.;MARINELLI, F., TETRAHEDRON LETT., 30,(1989) N9, C. 2581-2584