InCl3 and In(OTf)3 catalyzed reactions: synthesis of 3-acetyl indoles, bis-indolylmethane and indolylquinoline derivatives

Indium trichloride and indium triflate were found to be effective catalysts for the acetylation of indoles to 3-acetyl indoles and is reported for the first time in good yield. Indium triflate is also found to be an efficient catalyst for the synthesis of bis-indolylmethane and indolylquinoline derivatives.