5-secondary alkylidene hydantoins

Details 5-secondary alkylidene hydantoins 5-secondary alkylidene hydantoins

C - Chemistry, Metallurgy

07

D

260/315.05

C07D 233/02 (2006.01) C07D 233/96 (2006.01)

Patent

CA 1096389

Dis. 5101 5-SECONDARY ALKYLIDENE HYDANTOINS Abstract of the Disclosure A 5-Secondary alkylidene hydantoin having the formula Image in which: (a) R is an alkyl group having 1-2 carbon atoms; and (b) X is hydrogen or a phenyl group can be prepared by condensing a hydantoin having the formula Image and a ketone having the formula Image in the presence of ammonia or an amine catalyst, the amine being a primary amine having a pKb between about 3 and about 5. The 5-secondary alkylidene hydantoins are useful in the preparation of alpha-keto carboxylic acids which in turn have many uses, e.g. in the synthesis of amino acids, as catalysts in the copolymerization of unsaturated monomers, hair treating agents etc. - 1 -

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