Patent US4777265A successfully refreshed from Google Patents.
US4777265A
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Preparation of acrylates and methacrylates
Assignee: BASF SE
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Filing: 1987-03-05
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Granted: 1988-10-11
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Expires: 2007-03-05
Abstract
Abstract Acrylates or methacrylates I ##STR1## (A and B=C 2 -C 5 -alkylene, R 1 =H, CH 3 ) are prepared by reacting an acrylate or methacrylate II ##STR2## (R 2 =C 1 -C 4 -alkyl) with a heterocycle III ##STR3## in the presence of titanium alcoholates chelate compounds of the metals titanium, zirconium, iron and zinc with 1,3-dicarbonyl compounds.
Inventors
- 👤 Franz Merger
- 👤 Hans-Martin Hutmacher
- 👤 Wolfgang Schwarz
- 👤 Gerhard Nestler
- 👤 Maria G. Szucsanyi
- 👤 Rudolf Mueller-Mall
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-30 20:19
CPC Classifications
C; C07; C07D; C07D239/00; C07D239/02; C07D239/06; C07D239/08; C07D239/10; C07D233/00; C07D233/04; C07D233/28; C07D233/30; C07D233/32; C07D243/00; C07D243/04; C07D245/00; C07D245/02
Claims Analysis
Total Claims: 8
Claim 1
Independent Claim
92 words
A process for preparing an acrylate or methacrylate of the formula I ##STR9## where R 1 is hydrogen or methyl and A and B are each branched or unbranched alkylene of 2 to 5 carbon atoms, which comprises reacting an acrylate or methacrylate of the formula II ##STR10## where R 2 is alkyl of 1 to 4 carbon atoms with a heterocycle of the formula III ##STR11## in the presence of a titanium alcoholate or a chelate compound of one of the metals titanium, zirconium, iron or zinc with a 1,3-dicarbonyl compound.
Claim 2
Dependent Claim
92 words
A process for preparing an acrylate or methacrylate of the formula I ##STR9## where R 1 is hydrogen or methyl and A and B are each branched or unbranched alkylene of 2 to 5 carbon atoms, which comprises reacting an acrylate or methacrylate of the formula II ##STR10## where R 2 is alkyl of 1 to 4 carbon atoms with a heterocycle of the formula III ##STR11## in the presence of a titanium alcoholate or a chelate compound of one of the metals titanium, zirconium, iron or zinc with a 1,3-dicarbonyl compound.
Claim 3
Dependent Claim
18 words
The process of claim 1, wherein the reaction is carried out in the presence of a titanium tetraalcoholate.
Claim 4
Dependent Claim
25 words
A process as claimed in claim 1, wherein the reaction is carried out in the presence of a acetylacetonate of zirconium, zinc, titanium or iron.
Claim 5
Dependent Claim
16 words
A process as claimed in claim 1, wherein methyl or ethyl methacrylate is reacted with 1-(2-hydroxyethyl)imidazolidin-2-one.
Claim 6
Dependent Claim
29 words
A process as claimed in claim 1, wherein the alkanol of ester II, which is eliminated in the course of the reaction, is continuously removed from the reaction mixture.
Claim 7
Dependent Claim
20 words
A process as claimed in claim 1, wherein the reaction is carried out in the presence of a polymerization inhibitor.
Claim 8
Dependent Claim
19 words
A process as claimed in claim 6, wherein the reaction is carried out in the presence of atmospheric oxygen.
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) | 1991-10-11 | 1992-04-11 | 1992-10-11 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1995-10-11 | 1996-04-11 | 1996-10-11 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1999-10-11 | 2000-04-11 | 2000-10-11 | $7700.00 | Window Closed / Lapsed |