A New Protocol to Synthesize Di(indolyl)pyrazolyl Methanes Using H2PtCl6 as a Catalyst in Ionic Liquid: Synthesis of Novel 3-[1H-indol-3-yl(3-phenyl-1H-pyrazol-4-yl)methyl]-1H-indoles

Biologically important di(indolyl)pyrazolyl methanes and their derivatives were synthesized in excellent yields by the electrophilic substitution of indole with pyrazolyl aldehydes catalyzed by H2PtCl6 in ionic liquid.