US3879451A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Process for the production of (plus)-cis-, (plus)-trans-mixed chrysanthemic acid
Assignee: Sumitomo Chemical Co Ltd
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Filing: 1972-10-17
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Granted: 1975-04-22
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Expires: 1992-10-17
Abstract
Abstract WHEREIN R1 and R2 are individually a hydrogen atom or a lower alkyl. An optical resolution process for preparation of optically active (+)-cis-, (+)-trans-mixed chrysanthemic acid which comprises resolving a mixture of ( + OR - )-cis- and ( + OR - )trans-chrysanthemic acids by using as a resolution agent an optically active organic amine having the formula,
Inventors
- 👤 Hirosuke Yoshioka
- 👤 Hajime Hirai
- 👤 Akira Toyoura
- 👤 Kenzo Ueda
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-30 12:21
CPC Classifications
A; A01; A01N; A01N53/00
Claims Analysis
Total Claims: 6
Claim 1
Independent Claim
59 words
A PROCESS FOR THE PREPARATION OF A MIXTURE OF (+)-CIS-AND (+)-TRANS-CHRYSANTHEMIC ACIDS WHICH COMPRISES MIXING A MIXTURE OF ($)-CIS- AND ($)-TRANS:CHRYSANTHEMIC ACIDS IN AN ORGANIC SOLVENT SELECTED FROM THE GROUP CONSISTING OF METHANOL, ETHANOL, PROPANOL, ISOPROPANOL, ACETONE, METHYL ETHYL KETONE, TETRAHYDROFURAN, DIOXANE, DIMETHYLFORMAMIDE, DIMETHYLSULFOXIDE, A MIXTURE THEREOF AND AN AQUEOUS MIXTURE THEREOF, WITH A DEXTROROTATORY AMINE HAVING THE FORMULA,
Claim 2
Dependent Claim
59 words
A PROCESS FOR THE PREPARATION OF A MIXTURE OF (+)-CIS-AND (+)-TRANS-CHRYSANTHEMIC ACIDS WHICH COMPRISES MIXING A MIXTURE OF ($)-CIS- AND ($)-TRANS:CHRYSANTHEMIC ACIDS IN AN ORGANIC SOLVENT SELECTED FROM THE GROUP CONSISTING OF METHANOL, ETHANOL, PROPANOL, ISOPROPANOL, ACETONE, METHYL ETHYL KETONE, TETRAHYDROFURAN, DIOXANE, DIMETHYLFORMAMIDE, DIMETHYLSULFOXIDE, A MIXTURE THEREOF AND AN AQUEOUS MIXTURE THEREOF, WITH A DEXTROROTATORY AMINE HAVING THE FORMULA,
Claim 3
Dependent Claim
69 words
A process for the preparation of a mixture of (+)-cis- and (+)-TRANS-CHRYSANTHEMIC acids which comprises mixing a mixture of ( + or - )-cis- and ( + or - )-trans-chrysanthemic acids in an organic solvent selected from the group consisting of methanol, ethanol, propanol, isopropanol, acetone, methyl ethyl ketone, tetrahydrofuran, dioxane, dimethylformamide, dimethylsulfoxide, a mixture thereof and an aqueous mixture thereof, with a dextrorotatory organic amine having the formula,
Claim 4
Dependent Claim
69 words
A process for the preparation of a mixture of (+)-cis- and (+)-TRANS-CHRYSANTHEMIC acids which comprises mixing a mixture of ( + or - )-cis- and ( + or - )-trans-chrysanthemic acids in an organic solvent selected from the group consisting of methanol, ethanol, propanol, isopropanol, acetone, methyl ethyl ketone, tetrahydrofuran, dioxane, dimethylformamide, dimethylsulfoxide, a mixture thereof and an aqueous mixture thereof, with a dextrorotatory organic amine having the formula,
Claim 5
Dependent Claim
38 words
A process according to claim 1, wherein the content of ( + or - )-cis-chrysanthemic acid in the mixture of ( + or - )-cis- and ( + or - )-trans-chrysanthemic acids is 10 to 30% by weight.
Claim 6
Dependent Claim
34 words
A process according to claim 1, wherein the dextrorotatory organic amine is selected from the group consisting of (+)- Alpha -phenyl- Beta -p-tolyl-ethylamine, (+)- Alpha -p-tolyl- Beta -phenyl-ethylamine and (+)- Alpha -phenyl- Beta -phenyl-ethylamine.
References Cited (Backward Citations)
US3739019A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1978-04-21 | 1978-10-21 | 1979-04-22 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1982-04-21 | 1982-10-21 | 1983-04-22 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1986-04-21 | 1986-10-21 | 1987-04-22 | $7700.00 | Window Closed / Lapsed |