US4181654A
Expired / Lapsed
US
⏱️ 0.0 years remaining
2,3-Dihydroxybenzoic acid amides of tetraazaalkanes and tetaaza cycloalkanes
Assignee: United States Department of Energy
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Filing: 1978-07-24
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Granted: 1980-01-01
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Expires: 1998-07-24
Abstract
Abstract A compound of the formula: <IMAGE> <IMAGE> wherein X is hydrogen or a conventional electron-withdrawing group, particularly -SO3H or a salt thereof; n is 2, 3, or 4; m is 2, 3, or 4; and p is 2 or 3. The present compounds are useful as specific sequestering agents for actinide (IV) ions. Also described is a method for the 2,3-dihydroxybenzamidation of azaalkanes.
Inventors
- 👤 Frederick L. Weitl
- 👤 Kenneth N. Raymond
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-02 17:35
CPC Classifications
C; C07; C07D; C07D257/00; C07D257/02
Claims Analysis
Total Claims: 13
Claim 1
Independent Claim
39 words
A compound of the formula: ##STR5## wherein X is hydrogen, --SO 3 H or a salt thereof, or --NO 2 ; n is 2, 3, or 4; m is 2, 3, or 4; and p is 2 or 3.
Claim 2
Dependent Claim
39 words
A compound of the formula: ##STR5## wherein X is hydrogen, --SO 3 H or a salt thereof, or --NO 2 ; n is 2, 3, or 4; m is 2, 3, or 4; and p is 2 or 3.
Claim 3
Dependent Claim
20 words
A compound as in claim 1 wherein the formula is ##STR6## and n, m, and p are 2 or 3.
Claim 4
Dependent Claim
11 words
A compound as in claim 2 wherein the compound is 1,4,8,11-N,N',N",N'"-tetra(2,3-dihydroxybenzoyl)tetraazacyclotetradecane.
Claim 5
Dependent Claim
11 words
A compound as in claim 2 wherein the compound is 1,4,8,11-N,N',N",N'"-tetra(2,3-dihydroxy-5-nitrobenzoyl)tetraazacyclotetradecane.
Claim 6
Dependent Claim
11 words
A compound as in claim 2 wherein the compound is 1,5,9,13-N,N',N",N'"-tetra(2,3-dihydroxybenzoyl)tetraazacyclohexadecane.
Claim 7
Dependent Claim
18 words
A compound as in claim 2 wherein the compound is a 1,5,9,13-N,N',N",N'"-tetra(2,3-dihydroxybenzoyl)tetraazacyclohexadecane sulfonic acid or a salt thereof.
Claim 8
Dependent Claim
11 words
A compound as in claim 2 wherein the compound is 1,4,8,12-N,N',N",N'"-tetra(2,3-dihydroxybenzoyl)tetraazacyclopentadecane.
Claim 9
Dependent Claim
17 words
A compound as in claim 2 wherein the compound is 1,4,8,12-N,N',N",N'"-tetra(2,3-dihydrobenzoyl)tetraazacyclopentadecane sulfonic acid or a salt thereof.
Claim 10
Dependent Claim
11 words
A compound as in claim 1 wherein the formula is ##STR7##
Claim 11
Dependent Claim
11 words
A compound as in claim 9 wherein the compound is 1,4,8,11-N,N',N",N'"-tetra(2,3-dihydroxybenzoyl)tetraazaundecane.
Claim 12
Dependent Claim
17 words
A compound as in claim 9 wherein the compound is 1,4,8,11-N,N',N",N'"-tetra(2,3-dihydroxybenzoyl)tetraazaundecane sulfonic acid or a salt thereof.
Claim 13
Dependent Claim
11 words
A compound as in claim 9 wherein the compound is 1,6,11,16-N,N',N",N'"-tetra(2,3-dihydroxybenzoyl)tetraazahexadecane.
References Cited (Backward Citations)
USB403326I5
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1982-12-31 | 1983-07-02 | 1984-01-01 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1986-12-31 | 1987-07-02 | 1988-01-01 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1990-12-31 | 1991-07-02 | 1992-01-01 | $7700.00 | Window Closed / Lapsed |