US4806644A
Expired / Lapsed
US
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Process for the preparation of 5-acylpyrimidines
Assignee: Bayer AG
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Filing: 1987-04-01
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Granted: 1989-02-21
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Expires: 2007-04-01
Abstract
Abstract A process for the preparation of a 5-acylpyrimidine of the formula ##STR1## in which R is an organic radical comprising reacting a methyl ketone of the formula R--CO--Ch.sub.3 in a first stage with a formylating reagent in the presence of a base to form an enolketone of the formula R--CO--CH═CH--OR.sup.10 in which R 10 represents hydrogen or a base radical, thereafter reacting the enolketone in 2nd and 3rd stages with formamidine or a formamidine salt, and with an amino-formylating agent, and, in a 4th stage heating to cyclize the compound formed. The end products, some of which are new, are intermediates for making herbicides.
Inventors
- 👤 Hans-Ludwig Elbe
- 👤 Graham Holmwood
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-07 20:47
CPC Classifications
C; C07; C07D; C07D239/00; C07D239/02; C07D239/24; C07D239/26; C07C; C07C45/00; C07C45/61; C07C45/67; C07C45/68; C07C49/00; C07C49/20; C07C49/24; C07C49/76; C07C49/82; C07C49/835
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
90 words
A 5-acyl-pyrimidine of the formula ##STR46## in which R 11 represents phenyl which is mono-or di-substituted by fluorine, chlorine, methyl, ethyl, isopropyl, tert.-butyl, methoxy, methylthio, trifluoromethyl, trifluoromethoxy and/or trifluoromethylthio; or represents the grouping ##STR47## in which R 6 represents phenyl which is optionally mono-or di-substituted by fluorine, chlorine and/or bromine; or represents the grouping --XR 7 ; R 7 represents alkyl with 1 to 4 carbon atoms or phenyl which is optionally mono- or di-substituted by chlorine; X represents oxygen or sulphur, and n represents the number 0 or 1.
Claim 2
Dependent Claim
90 words
A 5-acyl-pyrimidine of the formula ##STR46## in which R 11 represents phenyl which is mono-or di-substituted by fluorine, chlorine, methyl, ethyl, isopropyl, tert.-butyl, methoxy, methylthio, trifluoromethyl, trifluoromethoxy and/or trifluoromethylthio; or represents the grouping ##STR47## in which R 6 represents phenyl which is optionally mono-or di-substituted by fluorine, chlorine and/or bromine; or represents the grouping --XR 7 ; R 7 represents alkyl with 1 to 4 carbon atoms or phenyl which is optionally mono- or di-substituted by chlorine; X represents oxygen or sulphur, and n represents the number 0 or 1.
References Cited (Backward Citations)
US4713456A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1992-02-21 | 1992-08-22 | 1993-02-21 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1996-02-21 | 1996-08-22 | 1997-02-21 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 2000-02-21 | 2000-08-22 | 2001-02-21 | $7700.00 | Window Closed / Lapsed |