Title Efficient Synthesis of bis(indolyl)methanes in the presence of BF3.SiO2 in deep eutectic solvent Type Presentation Keywords BF3.SiO2, Deep eutectic solvent, Bis(indolyl)methanes, Ionic liquids Abstract An efficient synthesis of bis(indolyl)methanes with indole in the reaction with aldehyde derivatives in the present of BF3.SiO2 in deep eutectic solvent (N-phenyliminodiacetic acid: choline chloride (2:1 mol ratio)). Researchers ali akbari (First researcher)Muhammad Saleh Faryabi (Second researcher)hassan raiei ahovan (Third researcher)