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US3723455A
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US
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Preparation of 1,4-substituted-imidazolin-2-ones
Assignee: Monsanto Co
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Filing: 1971-04-22
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Granted: 1973-03-27
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Expires: 1991-04-22
Abstract
Abstract 1,4-Substituted-imidazolin-2-ones optionally substituted in the 5 position are prepared from N-propenyl-carbamoyl azides by thermolysis. The compounds are useful as analgesics, antipyretics, anti-inflammatories, herbicides and as intermediates in the preparation of imidazolidinones by hydrogenation which can be hydrolyzed to diamines which are useful in producing polyamides.
Inventors
- 👤 J Chupp
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-09 08:11
CPC Classifications
C; C07; C07D; C07D233/00; C07D233/54; C07D233/66; C07D233/70
Claims Analysis
Total Claims: 8
Claim 1
Independent Claim
14 words
The process of claim 1 wherein the temperature is from 40*C to about 200*C.
Claim 2
Dependent Claim
15 words
The process as in claim 1 wherein the temperature is from 100*C to about 150*C.
Claim 3
Dependent Claim
10 words
The process of claim 1 wherein the solvent is chlorobenzene.
Claim 4
Dependent Claim
13 words
The process of claim 4 wherein the encarbamoyL azide is N-allyl-N-(1-cyclo-hexen-1-yl) carbamoyl azide.
Claim 5
Dependent Claim
12 words
The process of claim 4 wherein the encarbamoyl azide in N-cinnamoyl-N-methylcarbamoyl azide.
Claim 6
Dependent Claim
12 words
The process of claim 4 wherein the encarbamoyl azide is N-allyl-N-phenylcarbamoyl azide.
Claim 7
Dependent Claim
12 words
The process of claim 4 wherein the encarbamoyl azide is N-diallylcarbamoyl azide.
Claim 8
Dependent Claim
12 words
The process of claim 4 wherein the encarbamoyl azide is N-allyl-N-(3,4-dichlorophenyl)carbamoyl azide.
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) | 1976-03-26 | 1976-09-25 | 1977-03-27 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1980-03-26 | 1980-09-25 | 1981-03-27 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1984-03-26 | 1984-09-25 | 1985-03-27 | $7700.00 | Window Closed / Lapsed |