Patent EP0146121A2 successfully refreshed from Google Patents.
EP0146121A2
Expired / Lapsed
EP
⏱️ 0.0 years remaining
Ascorbic acid ethers and their production
Assignee: Takeda Pharmaceutical Co Ltd
•
Filing: 1984-12-13
•
Granted: —
•
Expires: 2004-12-13
Abstract
Abstract An ascorbic acid derivative of the formula:wherein R<sub>1</sub> is an organic residue having a molecular weight of from 58 to 400 is novel compound and is useful as antioxidant agent for food.
Inventors
- 👤 Shinji Terao
- 👤 Minoru Hirata
Bibliographic Details
Application Number
—
Jurisdiction
EP
Data Source
google_patents
Last Synchronized
2026-10-26 20:55
CPC Classifications
C; C07; C07D; C07D405/00; C07D405/02; C07D405/12; A; A23; A23B; A23B2/00; A23B2/70; A23B2/725; A23B2/729; C07D307/00; C07D307/02; C07D307/34; C07D307/56; C07D307/62; C07D405/14; C07D407/00; C07D407/02; C07D407/04
Claims Analysis
Total Claims: 13
Claim 1
Independent Claim
23 words
An ascorbic acid derivative of the formula: wherein R 1 is an organic residue having a molecular weight of from 58 to 400.
Claim 2
Dependent Claim
23 words
An ascorbic acid derivative of the formula: wherein R 1 is an organic residue having a molecular weight of from 58 to 400.
Claim 3
Dependent Claim
19 words
A compound as claimed in Claim 1, wherein R 1 is a C 5-22 straight-chain or branched-chain alkyl group.
Claim 4
Dependent Claim
98 words
A compound as claimed in Claim 1, wherein R 1 is a C 1-10 straight-chain or branched-chain alkyl group which has one to three substituent(s), the substituent being the class consisting of (1) C l-6 alkoxycarbonyl, (2) aryl which may have one to three substituents(s) of the class consisting of C 1-5 alkyl, C 1-3 alkoxy, halogen, nitro, amino, oxo, hydroxyland benzyloxy, (3) arylcarbonyloxy which may have one to three substituent(s) of the class consisting of C 1-5 alkyl, C 1-3 alkoxy, halogen, nitro, amino, oxo, hydroxy l and benzyloxy, (4) 2,3,5-trimethyl-1,4-benzo- quinoyl, (5) 2,3-dimethoxy-5-methyl-1,4-benzoquinoyl and (6) 2-methyl-1,4-naphthoquinoyl.
Claim 5
Dependent Claim
35 words
A compound as claimed in Claim 1, wherein R 1 is a C 2-20 -alkenyl group which may have one to three substituent(s), the substituent being the class consisting of aryl, 3-pyridyl, thienyl and furyl.
Claim 6
Dependent Claim
35 words
A compound as claimed in Claim 1, wherein R 1 is an aryl group which may have one to three substituent(s), the substituent being the class consisting of C 1-5 alkyl, methoxy, methylenedioxy and hydroxyl.
Claim 7
Dependent Claim
53 words
A compound as claimed in Claim 1, wherein R 1 is a C 1-9 acyl group of the class consisting of formyl, acetyl, propionyl, n-butyryl, isobutyryl, benzoyl, morpholinocarbonyl, C 1-3 alkoxy-carbonylpyrrolidinocarbonyl, Cl-3alkoxy-carbonyl, arylcarbonyl and arylcarbonyl which have one to three substituent(s) of the class consisting of hydroxyl group, C 1-5 alkyl and Cl-3alkoxy.
Claim 8
Dependent Claim
39 words
A compound as claimed in Claim 1, wherein R 1 is an aryloxy group which may have one to three substituent(s), the substituent being the class consisting of hydroxyl group, C 1-5 alkyl group and C 1-3 alkoxy group.
Claim 9
Dependent Claim
36 words
A compound as claimed in Claim 1, wherein R 1 is -(CH 2 ) B CH 3' -(CH 2 ) 16 CH 3' -(CH 2 ) 18 CH 3' -(CH 2 ) 9 COOCH 3 or
Claim 12
Independent Claim
63 words
A method for producing an ascrobic acid derivative of the formula: wherein R 1 is an organic residue having a molecular weight of from 58 to 400, which comprises subjecting a 5,6-acetal or ketal derivative of a compound of the formula: wherein R 1 is as defined above and R 2 is a group removable by hydrolysis and/or reduction, to hydrolysis and/or reduction.
Claim 13
Independent Claim
63 words
A method for producing an ascrobic acid derivative of the formula: wherein R 1 is an organic residue having a molecular weight of from 58 to 400, which comprises subjecting a 5,6-acetal or ketal derivative of a compound of the formula: wherein R 1 is as defined above and R 2 is a group removable by hydrolysis and/or reduction, to hydrolysis and/or reduction.
Claim 14
Dependent Claim
30 words
An antioxidant preparation for food which contains an ascorbic acid derivative of the formula: wherein R 1 is an organic residue having a molecular weight of from 58 to 400.
Claim 15
Dependent Claim
30 words
An antioxidant preparation for food which contains an ascorbic acid derivative of the formula: wherein R 1 is an organic residue having a molecular weight of from 58 to 400.
References Cited (Backward Citations)
No citation records indexed.
USPTO Annuity & Maintenance Windows
Maintenance schedule is calculated for granted US utility patents.