5-Benzylidenehydantoin → 5-(Phenylmethyl)-2,4-imidazolidinedione

참여 물질

반응 단계

190 g (1 mole) of 5-benzylidene-hydantoin are dissolved in 2 l of a N sodium hydroxide solution and 40 g of 5% palladium/charcoal catalyst are added. The mixture is hydrogenated at room temperature under atmospheric pressure and under shaking for 4 hours. The reaction mixture is worked up according to Example 6. Thus 150.2 g of the desired compound are obtained, yield 79%. Mp.: 187°-189° C.

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