DICARBOXYLIC ACID MONOESTER AND ITS PREPARATION

• Main Authors: FUJITA YOSHIJI, SHIONO MANZOU, NISHIDA TAKUJI
• Format: Patent
• Language: English
• Published: 19.11.1984
• Subjects: ADHESIVES; ANIMAL AND VEGETABLE OILS, FATS, FATTY SUBSTANCES AND WAXES; CANDLES; CHEMISTRY; CLIMATE CHANGE MITIGATION TECHNOLOGIES IN THE PRODUCTION ORPROCESSING OF GOODS; DETERGENTS; DYES; ESSENTIAL OILS; FATTY ACIDS THEREFROM; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; HETEROCYCLIC COMPOUNDS; MATERIALS FOR MISCELLANEOUS APPLICATIONS, NOT PROVIDED FORELSEWHERE; METALLURGY; MISCELLANEOUS APPLICATIONS OF MATERIALS; MISCELLANEOUS COMPOSITIONS; NATURAL RESINS; ORGANIC CHEMISTRY; PAINTS; PERFUMES; POLISHES; PRODUCING (PRESSING, EXTRACTION), REFINING AND PRESERVINGFATS, FATTY SUBSTANCES (e.g. LANOLIN), FATTY OILS AND WAXES,INCLUDING EXTRACTION FROM WASTE MATERIALS; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS; TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINSTCLIMATE CHANGE

NEW MATERIAL:The dicarboxylic acid monoester of formula I [R is H or lower alkyl; R and R are H, lower alkyl or lower alkoxy or R and R together form CH=CHCH=CH; R is H or protecting group; R -R are H or alkyl; R and R or R and R may together form CH2, R and R may together form single bond, and R and R may together form CH=CHCH=CH, CH2CH= CHCH2, CH2C(CH3)=CHCH2, CH2CH2CH2CH2, CH2CH(CH3)CH2CH2 or group of formula II-IV; X is halogen; n is 0, 1 or 2]. EXAMPLE:Succinic acid mono[2-(3,4-dihydro-6-hydroxy-2,5,7,8-tetramethyl-2H- benzopyranyl)ethyl] ester. USE:An antioxidation agent having higher activity than vitamin E, or its intermediate. PREPARATION:The compound of formula I can be prepared by reacting the compound of formula V (R is H or protecting group) with the compound of formula VI.