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-methyl- -ethyl- -phenylhydantoin production by benzene acetone cyclization, methylation derived. . cyclization to ammonium carbonate, potassium cyanide, ammonia, benzene, acetone and ethanol followed by adding the mixture, heating the reaction, the reactant into the ice water, add diluted hydrochloric
white powder. filtration, the filtrate plus destruction of cyanide in aqueous solution of ferrous sulfate. cake by washing to neutral, drying, may -ethyl- -phenyl-hydantoin. . methylation to -ethyl- - phenyl-hydantoin dissolved in sodium hydroxide solution, slowly adding dimethyl sulfate, h at - °c reaction...
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