J. S. Yadav, B. V. Subba Reddy, C. V. S. R. Murthy, G. Mahesh Kumar and C. Madan, “Lithium Perchlorate Catalyzed Reactions of Indoles: An Expeditious Synthesis of Bis(indolyl)methanes,” Synthesis, Vol. 5, 2001, pp. 783-787. doi:10.1055/s-2001-12777

has been cited by the following article:

• TITLE: n-Dodecylbenzene Sulfonic Acid (DBSA) as a Novel Brønsted Acid Catalyst for the Synthesis of Bis(indolyl)methanes and Bis(4-hydroxycoumarin-3-yl)methanes in Water

  AUTHORS: Balu Pawar, Vinod Shinde, Atul Chaskar

  KEYWORDS: n-Dodecylbenzene Sulfonic Acid (DBSA); Indole; Aldehyde; Bis(indolyl)methane; Bis(4-hydroxycoumarin-3-yl)methanes

  JOURNAL NAME: Green and Sustainable Chemistry, Vol.3 No.2, May 27, 2013

  ABSTRACT: n-Dodecylbenzene sulfonic acid (DBSA) as a novel, biodegradable, and efficient Br?nsted acid catalyst used for the reaction of indoles/4-hydroxy coumarin with aldehydes to obtain a bis(indolyl)methanes/bis(4-hydroxycoumarin-3-yl)methanes, respectively. The catalyst exhibited remarkable activity, and tolerated a wide variety of functional groups providing the desired bis(indolyl)methanes and bis(4-hydroxycoumarin-3-yl)methanes in good to excellent yield (70%-96%) in water.