US4293496A
Expired / Lapsed
US
⏱️ 0.0 years remaining
6(R)-[2-(8-Hydroxy-2,6-dimethylpolyhydronaphthyl-1)-ethyl]-4(R)-hydroxy-3,4,5,6-tetrahydro-2H-pyran-2-ones
Assignee: Merck and Co Inc
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Filing: 1980-08-05
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Granted: 1981-10-06
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Expires: 2000-08-05
Abstract
Abstract The title compounds are prepared by saponifying the corresponding 8-acyloxy compounds, with strong base at elevated temperatures to remove the hindered acyl group without disrupting the rest of the molecule. The products are useful as intermediates in the synthesis of antihypercholesterolemia agents.
Inventors
- 👤 Alvin K. Willard
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-24 09:46
CPC Classifications
C; C07; C07D; C07D309/00; C07D309/16; C07D309/28; C07D309/30
Claims Analysis
Total Claims: 7
Claim 1
Independent Claim
41 words
A compound of the formula ##STR38## in which the dotted lines X, Y and Z represent possible double bonds, said double bonds, when any are present, being either X and Z in combination or one of X, Y or Z alone.
Claim 2
Dependent Claim
41 words
A compound of the formula ##STR38## in which the dotted lines X, Y and Z represent possible double bonds, said double bonds, when any are present, being either X and Z in combination or one of X, Y or Z alone.
Claim 3
Dependent Claim
13 words
A compound of claim 1 in which X and Z represent double bonds.
Claim 4
Dependent Claim
12 words
A compound of claim 1 in which X is a double bond.
Claim 5
Dependent Claim
12 words
A compound of claim 1 in which Y is a double bond.
Claim 6
Dependent Claim
12 words
A compound of claim 1 in which Z is a double bond.
Claim 7
Dependent Claim
17 words
A compound of claim 1 in which none of X, Y or Z is a double bond.
References Cited (Backward Citations)
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1984-10-05 | 1985-04-06 | 1985-10-06 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1988-10-05 | 1989-04-06 | 1989-10-06 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1992-10-05 | 1993-04-06 | 1993-10-06 | $7700.00 | Window Closed / Lapsed |