Patent ID: 6504054
Filing Date: 2003-01-07
Classification: C07C

Abstract:
An amino acid derivative compositionwhich consists essentially of the S configuration of the amino acid derivatives as defined below of two or more kinds of amino acid derivatives represented by the general formula (1): wherein R's are the same or different and each represents a hydrogen atom or an alkyl group containing 1 to 18 carbon atoms; L1 represents â€”C*HXâ€”M2â€”X; L2 represents â€”CH2â€”M3â€”X or â€”CHXâ€”M4â€”X; M2, M3 and M4 are the same or different and each represents a straight or branched alkylene group containing 1 to 6 carbon atoms; X represents COOM; M's are the same or different and each represents a hydrogen atom, an alkali metal atom, an alkaline earth metal atom or an ammonium group; m represents an integer of 1 or 2 and n represents an integer of 0 or 1 on the condition that m+n is equal to 2; and * indicates that the asymmetric carbon atom carrying this symbol is in S configuration, said amino acid derivative composition being superior in biodegradability and chelating activity to racemic form having an unspecified configuration on the asymmetric carbon atom carrying the symbol.