TOCOPHEROL-5,6-O-ISOPROPYLIDENE-L-ASCORBIC ACID-2-DICARBOXYLIC ACID DIESTER, PRODUCTION THEREOF AND VITAMIN C VITAMIN E SUPPLIER COMPOSED OF SAME DIESTER

摘要

NEW MATERIAL:A compound expressed by the formula {R1 and R2 are H or CH3; R3 is CH2, 0, CO or [(CH2)p-CH=CH]q, etc., (p and q are 0-4); x and y are 0-10}. USE:Used as a vitamin C and vitamin E supplier. Also used for food as an anti- oxidizing agent, for drug such as anti-inflammatory or inhibition of platelet aggregation, etc., and further useful as raw material of cosmetic, etc., having whitening effect and senescence-inhibiting effect. PREPARATION:A dicarboxylic acid or anhydride of the acid is reacted with tocopherol in the presence of a base to obtain a tocopherol-acid dicarboxylic acid ester. Next, resultant ester is reacted with 5,6-O-isopropylidene-L-ascorbic acid in the presence of a base and a dehydrating agent at 0-50 deg.C to afford the compound expressed by the formula.