+++Thanks_tyler111_Article from Sciencedirect

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Title: 1,3-Dihalo-5,5-dimethylhydantoin or citric acid/NaNO2 as a heterogeneous system for the selective mononitration of phenols under mild conditions
Journal: Mendeleev Communications, Volume 16, Issue 1, 2006, Pages 41-42
Authors:Mohammad A. Zolfigol, Ezat Ghaemi, Elaheh Madrakian, Arash G. Choghamarani

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http://www.sciencedirect.com/science/article/pii/S0959943606700190

DOI:

http://dx.doi.org/10.1070/MC2006v016n01ABEH002116

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