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Patent US4554358A successfully refreshed from Google Patents.
US4554358A
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4-Chloro-4-methyl-5-methylene-1,3-dioxolane-2-one
Assignee: Akzo Nobel NV
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Filing: 1984-06-11
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Granted: 1985-11-19
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Expires: 2004-06-11
Abstract
Abstract 4-Chloro-4-methyl-5-methylene-1,3-dioxolane-2-one is useful as an intermediate for the synthesis of 4-chloromethyl-5-methyl-1,3-dioxolene-2-one which, in turn, finds use as a modifying agent for making various prodrugs. Said intermediate compound gives said objective compound in a good yield by a rearrangement reaction.
Inventors
- 👤 Yasushi Takebe
- 👤 Koji Iuchi
- 👤 Goro Tsukamoto
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-30 09:38
CPC Classifications
C; C07; C07D; C07D317/00; C07D317/08; C07D317/10; C07D317/32; C07D317/42; C07D317/34; C07D317/36
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
5 words
4-chloro-4-methyl-5-methylene-1,3-dioxolane-2-one of the formula: ##STR6##
Claim 2
Dependent Claim
5 words
4-chloro-4-methyl-5-methylene-1,3-dioxolane-2-one of the formula: ##STR6##
References Cited (Backward Citations)
US4342693A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1988-11-18 | 1989-05-20 | 1989-11-19 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1992-11-18 | 1993-05-20 | 1993-11-19 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1996-11-18 | 1997-05-20 | 1997-11-19 | $7700.00 | Window Closed / Lapsed |