| 摘要 |
PROBLEM TO BE SOLVED: To provide a method for producing a 3-O-alkylascorbic acid by alkylating ascorbic acid. SOLUTION: The method for producing the 3-O-alkylascorbic acid represented by formula (II) (wherein, R<SP>1</SP>denotes a 1-22C alkyl group) is characterized as follows. The L-ascorbic acid represented by formula (I) is reacted with a sulfonic acid compound represented by formula (III): R<SP>2</SP>SO<SB>3</SB>R<SP>1</SP>äwherein, R<SP>1</SP>has the same meaning as in formula (II); and R<SP>2</SP>denotes an aryl group or an alkyl group} or (IV): R<SP>1</SP>OSO<SB>3</SB>R<SP>1</SP>äwherein, R<SP>1</SP>s have each the same meaning as in formula (II)} in the presence of a tertiary amine. COPYRIGHT: (C)2006,JPO&NCIPI
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