OICC Press Iranian Journal of Catalysis 2345-4865 2 4 2024 02 03 Efficient synthesis of bis(indolyl)methanes catalyzed by (PhCH2PPh3)+Br- under solvent-free conditions EN Farhad Shirini Department of Chemistry, College of Science, University of Guilan, Rasht, Iran 0000-0002-7204-5000 Masoumeh Abedini Department of Chemistry, College of Science, University of Guilan, Rasht, zip code 41335, I.R. Iran. Manouchehr Mamaghani Department of Chemistry, Faculty of Sciences, University of Guilan, Rasht, Iran 0000-0002-2054-8685 Arman Rahmaninia Department of Chemistry, College of Science, University of Guilan, Rasht, zip code 41335, I.R. Iran. Journal Article 2024 02 03 Benzyltriphenylphosphonium bromide (BTPB) has been applied as an efficient catalyst for the preparation of bis(indolyl)methanes (BIMs) via electrophilic substitution of indoles with aldehydes in the absence of solvent.