Patent US2592783A successfully refreshed from Google Patents.
Patent US3915641A successfully refreshed from Google Patents.
US3915641A
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NMR method for determination of enantiomeric compositions with chiral shift reagents
Assignee: Wisconsin Alumni Research Foundation
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Filing: 1973-07-02
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Granted: 1975-10-28
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Expires: 1993-07-02
Abstract
Abstract Optically active fluorinated compounds derived from d- or lcamphor and their corresponding europium and praseodymium chelates and their use as chiral NMR shift reagents.
Inventors
- 👤 Harlan L Goering
- 👤 John N Eikenberry
- 👤 Gerald S Koermer
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-30 05:07
CPC Classifications
C; C07; C07C; C07C49/00; C07C49/92; C07C45/00; C07C45/45; C07C45/455; C07C45/87; C07C45/88; C07C49/385; C07C49/457; C07C49/467; C07C49/473; C07C49/477; C07C49/487; C07C49/507; C07C49/513; C07F; C07F5/00; C07F5/003; G; G01; G01N; G01N24/00; G01N24/08; G01R; G01R33/00; G01R33/20; G01R33/28; G01R33/281; Y; Y10; Y10T; Y10T436/00; Y10T436/24
Claims Analysis
Total Claims: 4
Claim 1
Independent Claim
29 words
THE METHOD FOR DETERMINATION OF ENANTIOMERIC COMPOSITIONS BY NMR ANALYSIS COMPRISING THE STEPS OF ADDING TO AN ENANTIOMERIC COMPOSITION A CHIRAL SHIFT REAGENT IN THE FORM OF TRIS 3-(HEPTAFLUOROPROPYLHYDROXYMETHYLENE)-D-CAMPHORATO
Claim 2
Independent Claim
29 words
THE METHOD FOR DETERMINATION OF ENANTIOMERIC COMPOSITIONS BY NMR ANALYSIS COMPRISING THE STEPS OF ADDING TO AN ENANTIOMERIC COMPOSITION A CHIRAL SHIFT REAGENT IN THE FORM OF TRIS 3-(HEPTAFLUOROPROPYLHYDROXYMETHYLENE)-D-CAMPHORATO
Claim 3
Independent Claim
38 words
The method for determination of enantiomeric compositions by NMR analysis comprising the steps of adding to an enantiomeric composition a chiral shift reagent in the form of tris(3-(heptafluoropropylhydroxymethylene)-d-camphorato)praseodymium(III) and carrying out an NMR analysis of the resulting mixture.
Claim 4
Independent Claim
38 words
The method for determination of enantiomeric compositions by NMR analysis comprising the steps of adding to an enantiomeric composition a chiral shift reagent in the form of tris(3-(heptafluoropropylhydroxymethylene)-d-camphorato)praseodymium(III) and carrying out an NMR analysis of the resulting mixture.
References Cited (Backward Citations)
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US3716335A
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US3700410A
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US3867418A
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USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1978-10-27 | 1979-04-28 | 1979-10-28 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1982-10-27 | 1983-04-28 | 1983-10-28 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1986-10-27 | 1987-04-28 | 1987-10-28 | $7700.00 | Window Closed / Lapsed |