Characterization of the products of ureas exposed to benzil and several new methods for the preparation of 5-5-diphenylhydantoins
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چکیده
Prof Angeli recently discovered another synthesis of the same compound and was kind enough to inform me by letter[2] and allow their use at this point: benzilic acid condenses after merging with symmetrical dimethylurea to lose two water molecules and gives the same expected products (shown to me and sent in a sample). Crystal form, melting point and mixed melting point were identical. From the formula of the start materials, his synthesis would yield a diphenyl-dimethylhydantoin:
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