It has been shown that bromination of 5-aryl-5-benzylidene-3,5-dihydro-4H-2-methylthioimidazol-4-one in methylene chloride at room temperature leads to the addition of bromine at the double bond, but the the reaction of 5-aryl-3,5-dihydro-4H-2-methylthio-5-(2-pyridylmethylene)imidazol-4-one gave complex compound of the starting materials. After boiling both of the compounds obtained in ethanol the corresponding 5-[bromo(aryl)methylene]imidazolidine-2,4-diones were obtained.
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Dedicated to Academician B. A. Trofimov on his 70th jubilee.
Translated from Khimiya Geterotsiklicheskikh Soedinenii, No. 9, 1406–1408, September, 2008.
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Antipin, R.L., Beloglazkina, E.K., Magouga, A.G. et al. A new method for the synthesis of 5-bromo(aryl)methylene-substituted hydantoins. Chem Heterocycl Comp 44, 1135–1137 (2008). https://doi.org/10.1007/s10593-008-0167-5
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DOI: https://doi.org/10.1007/s10593-008-0167-5