| 摘要 |
PROBLEM TO BE SOLVED: To provide a 5-(3- or 4-pyridyl)methyl hydantoin and a N- carbamoyl-3-(3- or 4-pyridyl)-alanine useful as a precursor of a 2- amino-3-(pyridyl)methyl hydantoin as a raw material for medicines, or agrochemicals. SOLUTION: The 5-pyridylmethylhydantoin is represented by general formula (wherein R is H, a halogen, alkyl, haloalkyl, alkoxy, haloalkoxy, alkylthio, alkyl-sulfonyl or alkoxycarbonyl; the bonding position between the pyridine ring and the hydantoin moiety is 2, 3 or 4 positions on the pyridine ring) and hydrogen halide salts thereof. In addition, the N-carbamoyl-3-(3- or 4-pyridyl)- alanine is given by ring-opening the pyridyl hydantoin chemically or biochemically.
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