US4517373A
Expired / Lapsed
US
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IsoMB-530B derivatives
Assignee: Sankyo Co Ltd
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Filing: 1982-08-24
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Granted: 1985-05-14
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Expires: 2002-08-24
Abstract
Abstract The 1-acyloxy-6-hydroxy-IsoMB-530B lactones of the formula (I): <IMAGE> (I) wherein R1 represents a group of the formula <IMAGE> wherein R2 is a C1-C10 alkyl group.
Inventors
- 👤 Akira Terahara
- 👤 Minoru Tanaka
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 13:47
CPC Classifications
C; C07; C07D; C07D309/00; C07D309/16; C07D309/28; C07D309/30; A; A61; A61P; A61P3/00; A61P3/06
Claims Analysis
Total Claims: 4
Claim 1
Independent Claim
29 words
A 1-acyloxy-6-hydroxy-IsoMB-530B lactone of the formula (I): ##STR20## wherein R 1 represents a group of the formula ##STR21## wherein R 2 is a C 1 -C 10 alkyl group.
Claim 2
Dependent Claim
29 words
A 1-acyloxy-6-hydroxy-IsoMB-530B lactone of the formula (I): ##STR20## wherein R 1 represents a group of the formula ##STR21## wherein R 2 is a C 1 -C 10 alkyl group.
Claim 3
Dependent Claim
46 words
The lactone of claim 1, wherein R 2 represents an alkyl group selected from methyl, ethyl, propyl, butyl, pentyl, hexyl, heptyl, octyl, nonyl, decyl, isopropyl, isobutyl, sec-butyl, t-butyl, isopentyl, neopentyl, t-pentyl, isohexyl, 1-ethylpropyl, 1-methylpentyl, 1-ethyl-1-methylpropyl, 1,1-dimethylpentyl, 1,2-dimethylpentyl, 1-methylhexyl, 1,1-dimethylhexyl, 1-methylheptyl, 1,1-dimethylheptyl, 1-methyloctyl, 1,1-dimethyloctyl and 1-methylnonyl groups.
Claim 4
Dependent Claim
12 words
The lactone of claim 1, wherein R 2 represents a sec-butyl group.
References Cited (Backward Citations)
GB2046737A
Cited
GB2049664A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1988-05-13 | 1988-11-12 | 1989-05-14 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1992-05-13 | 1992-11-12 | 1993-05-14 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1996-05-13 | 1996-11-12 | 1997-05-14 | $7700.00 | Window Closed / Lapsed |