Patent US4149003A successfully refreshed from Google Patents.
US4149003A
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Pyridine disulfide compounds
Assignee: Cytiva Sweden AB
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Filing: 1978-03-02
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Granted: 1979-04-10
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Expires: 1998-03-02
Abstract
Abstract Novel pyridine compounds having the formula R 1 -S-S-A-Z are disclosed, in which formula R 1 is 2-pyridyl, 5-nitro-2-pyridyl or 4-pyridyl, A is a hydrocarbon residue having 1-10 carbon atoms and Z is a group ##STR1## or acid addition salts of the last mentioned group, where n is 2 or 3, R 1 has the same significance as R 1 above and is equal thereto and R 2 is methyl or ethyl. These compounds are particularly useful as bifunctional coupling agents and as thiolating agents.
Inventors
- 👤 Jan P. E. Carlsson
- 👤 Rolf E. A. V. Axen
- 👤 Hakan N. Y. Drevin
- 👤 Goran E. S. Lindgren
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 19:01
CPC Classifications
C; C12; C12N; C12N11/00; C12N11/02; C12N11/06; C07; C07D; C07D213/00; C07D213/02; C07D213/04; C07D213/60; C07D213/62; C07D213/70; C07D213/71; G; G01; G01N; G01N33/00; G01N33/48; G01N33/50; G01N33/53; G01N33/543; G01N33/54353
Claims Analysis
Total Claims: 4
Claim 1
Independent Claim
75 words
Pyridine compounds, characterized in that they have the formulae R.sup.1 --S--S--A--Z (I) where R 1 is 2-pyridyl, 5-nitro-2-pyridyl or 4-pyridyl, A is a hydrocarbon residue having 1-10 carbon atoms, preferably 1-6 carbon atoms, and Z is a group ##STR25## or acid adddition salts of the last mentioned group, where n is 2 or 3, R 1 has the same significance as R 1 above and is equal thereto, and R 2 is methyl or ethyl.
Claim 2
Dependent Claim
75 words
Pyridine compounds, characterized in that they have the formulae R.sup.1 --S--S--A--Z (I) where R 1 is 2-pyridyl, 5-nitro-2-pyridyl or 4-pyridyl, A is a hydrocarbon residue having 1-10 carbon atoms, preferably 1-6 carbon atoms, and Z is a group ##STR25## or acid adddition salts of the last mentioned group, where n is 2 or 3, R 1 has the same significance as R 1 above and is equal thereto, and R 2 is methyl or ethyl.
Claim 3
Dependent Claim
24 words
A compound according to claim 1, wherein R 1 is 2-pyridyl, A is --CH 2 --CH 2 --, and Z is the group ##STR26##
Claim 4
Dependent Claim
24 words
A compound according to claim 1, wherein R 1 is 2-pyridyl, A is --CH 2 --CH 2 --, and Z is the group ##STR27##
References Cited (Backward Citations)
US2872450A
Cited
US3950348A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1982-04-09 | 1982-10-09 | 1983-04-10 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1986-04-09 | 1986-10-09 | 1987-04-10 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1990-04-09 | 1990-10-09 | 1991-04-10 | $7700.00 | Window Closed / Lapsed |