US4634558A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Preparation of α-substituted acrylamides
Assignee: BASF SE
•
Filing: 1984-11-30
•
Granted: 1987-01-06
•
Expires: 2004-11-30
Abstract
Abstract α-Substituted acrylamides of the general formula I ##STR1## where R 1 is a straight-chain, branched or cyclic alkyl radical of not more than 15 carbon atoms which can be unsubstituted or further substituted, are prepared by a process in which the corresponding α-substituted acrolein oximes are heated at from 40° to 250° C. in the presence of a copper(II) carboxylate and of an unsubstituted or substituted acrylonitrile as cocatalyst.
Inventors
- 👤 Franz Merger
- 👤 Wolfgang Schwarz
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-31 22:21
CPC Classifications
C; C07; C07C; C07C231/00; C07C231/10; C07C249/00; C07C249/04; C07C249/08
Claims Analysis
Total Claims: 5
Claim 1
Independent Claim
113 words
A process for the preparation of an α-substituted acrylamide of the formula I ##STR6## where R 1 is a straight-chain, branched or cyclic alkyl radical of not more than 15 carbon atoms which can be unsubstituted or further substituted, from an aldoxime of the formula II ##STR7## where R 1 has the above meanings, wherein the aldoxime is heated at from 40° to 250° C. in the presence of a carrier-free copper(II) carboxylate obtained from a monocarboxylic acid of 2 to 18 carbon atoms and in the presence of a nitrile of the formula III ##STR8## where R 2 is hydrogen or has the same meaning as R 1 , as a cocatalyst.
Claim 2
Dependent Claim
113 words
A process for the preparation of an α-substituted acrylamide of the formula I ##STR6## where R 1 is a straight-chain, branched or cyclic alkyl radical of not more than 15 carbon atoms which can be unsubstituted or further substituted, from an aldoxime of the formula II ##STR7## where R 1 has the above meanings, wherein the aldoxime is heated at from 40° to 250° C. in the presence of a carrier-free copper(II) carboxylate obtained from a monocarboxylic acid of 2 to 18 carbon atoms and in the presence of a nitrile of the formula III ##STR8## where R 2 is hydrogen or has the same meaning as R 1 , as a cocatalyst.
Claim 3
Dependent Claim
17 words
The process of claim 1, wherein the reaction is carried out at from 60° to 180° C.
Claim 4
Dependent Claim
14 words
The process of claim 1, wherein the reaction is carried out under atmospheric pressure.
Claim 5
Dependent Claim
18 words
The process of claim 1, wherein the reaction is carried out in the presence of an inert solvent.
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) | 1990-01-05 | 1990-07-07 | 1991-01-06 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1994-01-05 | 1994-07-07 | 1995-01-06 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1998-01-05 | 1998-07-07 | 1999-01-06 | $7700.00 | Window Closed / Lapsed |