US4436923A
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Trifluoromethyl-substituted chromogenic crown ethers and methods of using same
Assignee: PRESIDENT AND TRUSTEES OF MIAMI UNIVERSITY OXFORD OH 45045 A CORP OF
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Filing: 1982-06-07
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Granted: 1984-03-13
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Expires: 2002-06-07
Abstract
Abstract Two novel trifluoromethyl-substituted chromogenic crown ethers are disclosed, 4'-(2",6"-dinitro-4" trifluoromethylphenyl) aminobenzo-15-crown-5 and 4'-(2",4"-dinitro-6"-trifluoromethylphenyl) aminobenzo-15-crown-5. These compounds are useful as reagents for the extraction and spectrophotometric determination of potassium in the presence of sodium. The compounds, their methods of manufacture, and methods of utilizing the compounds for the analysis of potassium are disclosed and claimed.
Inventors
- 👤 Gilbert E. Pacey
- 👤 Benard P. Bubnis
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-01 17:29
CPC Classifications
C; C07; C07D; C07D323/00
Claims Analysis
Total Claims: 8
Claim 1
Independent Claim
17 words
Chromogenic crown ethers of the formula ##STR5## where R is taken from the group consisting of ##STR6##
Claim 2
Dependent Claim
17 words
Chromogenic crown ethers of the formula ##STR5## where R is taken from the group consisting of ##STR6##
Claim 3
Dependent Claim
2 words
4'-(2",6"-dinitro-4"-trifluoromethylphenyl) aminobenzo-15-crown-5.
Claim 4
Dependent Claim
2 words
4'-(2",6"-dinitro-4"-trifluoromethylphenyl) aminobenzo-15-crown-5.
Claim 5
Dependent Claim
2 words
4'-(2",4"-dinitro-6"-trifluoromethyl-phenyl) aminobenzo-15-crown-5.
Claim 6
Dependent Claim
2 words
4'-(2",4"-dinitro-6"-trifluoromethyl-phenyl) aminobenzo-15-crown-5.
Claim 7
Dependent Claim
54 words
A process for synthesis of trifluoromethyl-substituted, 15-crown-5 chromogenic ethers, comprising the following steps in sequence: (a) forming a reaction mixture in an organic solvent of (i) 4'-aminobenzo-15-crown-5, (ii) a compound selected from the group consisting of 1-chloro-2,6-dinitro-4-trifluoromethylbenzene, and 1-chloro-2,4-dinitro-6-trifluoromethylbenzene, and (iii) a base, and (b) isolating a trifluoromethyl-substituted crown ether from said reaction mixture.
Claim 8
Dependent Claim
54 words
A process for synthesis of trifluoromethyl-substituted, 15-crown-5 chromogenic ethers, comprising the following steps in sequence: (a) forming a reaction mixture in an organic solvent of (i) 4'-aminobenzo-15-crown-5, (ii) a compound selected from the group consisting of 1-chloro-2,6-dinitro-4-trifluoromethylbenzene, and 1-chloro-2,4-dinitro-6-trifluoromethylbenzene, and (iii) a base, and (b) isolating a trifluoromethyl-substituted crown ether from said reaction mixture.
References Cited (Backward Citations)
No citation records indexed.
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1987-03-13 | 1987-09-12 | 1988-03-13 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1991-03-13 | 1991-09-12 | 1992-03-13 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1995-03-13 | 1995-09-12 | 1996-03-13 | $7700.00 | Window Closed / Lapsed |