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Arani, N.M. and Safari, J. (2011) A Rapid and Efficient Ultrasound-Assisted Synthesis of 5,5-Diphenylhydantoins and 5,5-Diphenyl-2-Thiohydantoins. Ultrasonics Sonochemistry, 18, 640-643.
http://dx.doi.org/10.1016/j.ultsonch.2010.09.001

has been cited by the following article:

• TITLE: One-Pot Synthesis of Imidazolidine-2-Thiones, Hydantoins and Thiohydantoins under Solvent-Free and Grinding Conditions

  AUTHORS: Mohammad M. Ghanbari, Zahra Roohi, Javad Safari

  KEYWORDS: Green Synthesis, Imidazolidine-2-Thiones, Hydantoin, Thiohydantoin, Grinding, Solvent-Free

  JOURNAL NAME: Open Access Library Journal, Vol.1 No.7, October 13, 2014

  ABSTRACT: A convenient, environmentally friendly and mild green synthesis of imidazolidine-2-thiones, hy-dantoin and thiohydantoin derivatives was developed by the one-pot reaction of benzils, urea or thiourea derivatives, and strong base at with grinding. The key advantages are the short reaction times, excellent yields, simple workup, and easy purification in the solvent-free condition. The present method aimed to overcome the limitations and drawbacks of the reported methods such as hard work-up, low yield, hazardous solvent and long reaction time.