Patent US4113740A successfully refreshed from Google Patents.
US4113740A
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Synthesis of optically active vitamin E
Assignee: DSM Nutritional Products LLC
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Filing: 1977-05-17
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Granted: 1978-09-12
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Expires: 1997-05-17
Abstract
Abstract Synthesis of optically active vitamin E from 2-methyl-5-oxotetrahydro-2-furoic acid including intermediates in this synthesis.
Inventors
- 👤 Noal Cohen
- 👤 Gabriel Saucy
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-06 19:35
CPC Classifications
C; C07; C07D; C07D307/00; C07D307/02; C07D307/26; C07D307/30; C07D307/32; C07D307/33; C07C; C07C37/00; C07C37/06; C07C37/07; C07C37/50; C07C46/00; C07C46/02; C07C46/06; C07D311/00; C07D311/02; C07D311/04; C07D311/58; C07D311/70; C07D311/72; C07D317/00; C07D317/08; C07D317/10; C07D317/14; C07D317/18; C07D317/20; C07D317/26; C07D317/30; C07D493/00; C07D493/02; C07D493/08; C07D493/10; C07B; C07B2200/00; C07B2200/07
Claims Analysis
Total Claims: 8
Claim 1
Independent Claim
25 words
A compound of the formula ##STR14## wherein R 3 is methyl or ##STR15## and R 4 , R 7 and R 8 are lower alkyl.
Claim 2
Dependent Claim
25 words
A compound of the formula ##STR14## wherein R 3 is methyl or ##STR15## and R 4 , R 7 and R 8 are lower alkyl.
Claim 3
Dependent Claim
11 words
The compound of claim 1 wherein said compound is (S)-(+)-dimethyl 2-hydroxy-6-methyl-4-(2,2,4-trimethyl-1,3-dioxolane-4-ethyl)-1,3-benzenedicarboxylate.
Claim 4
Dependent Claim
10 words
The compound of claim 1 wherein said compound is (S)-(+)-2,3,6-trimethyl-5-(2,2,4-trimethyl-1,3-dioxolane-4-ethyl)phenol.
Claim 5
Dependent Claim
22 words
A compound of the formula ##STR16## wherein R 3 is hydrogen or lower alkanoyl; R 7 and R 8 are lower alkyl.
Claim 6
Dependent Claim
22 words
A compound of the formula ##STR16## wherein R 3 is hydrogen or lower alkanoyl; R 7 and R 8 are lower alkyl.
Claim 7
Dependent Claim
10 words
The compound of claim 4 wherein said compound is (S)-(+)-2-hydroxy-6-methyl-4-(2,2,4-trimethyl-1,3-dioxolane-4-ethyl)benzene-1,3-dimethanol.
Claim 8
Dependent Claim
11 words
The compound of claim 4 wherein said compound is (S)-(+)-2-hydroxy-6-methyl4-(2,2,4-trimethyl-1,3-dioxolane-4-ethyl)benzene-1,3-dimethanol triacetate.
References Cited (Backward Citations)
No citation records indexed.
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1981-09-11 | 1982-03-13 | 1982-09-12 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1985-09-11 | 1986-03-13 | 1986-09-12 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1989-09-11 | 1990-03-13 | 1990-09-12 | $7700.00 | Window Closed / Lapsed |