Khaligh N.G. and Shirini F. (2014) N-sulfonic Acid Poly(4-vinylpyridinium) Hydrogen Sulfate as an Efficient and Reusable Solid Acid Catalyst for One-Pot Synthesis of Xanthene Derivatives in Dry Media under Ultrasound Irradiation. Ultrasonics Sonochemistry, 22, 397-403.

has been cited by the following article:

• TITLE: L-Pyrrolidine-2-Carboxylic Acid Sulfate (LPCAS): A New Ionic Liquid for the Synthesis of 14-Aryl-14H-Dibenzo[a,j] Xanthenes under Solvent Free Condition

  AUTHORS: Vaibhav W. Godse, Sahebrao S. Rindhe, Laszlo Kotai, Pravin S. Kendrekar, Rajendra P. Pawa

  KEYWORDS: Ionic Liquid, 14-Aryl-14H-Dibenzo[a, j] Xanthenes, Solvent-Free

  JOURNAL NAME: International Journal of Organic Chemistry, Vol.7 No.2, June 7, 2017

  ABSTRACT: A new Bronsted acidic ionic liquid, L-Pyrrolidine-2-carboxylic acid sulfate (LPCAS) was employed to promote one-pot synthesis of 14-aryl-14H-dibenzo [a,j] xanthenes via condensation reaction of aldehydes and 2-naphthol under solvent free condition. Distinguishing features of the methodology are excellent yield of products in shorter reaction time, cleaner reaction profile, eco-friendly nature and the use of inexpensive catalyst.