Patent US4017622A successfully refreshed from Google Patents.
US4017622A
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Piperazine derivatives
Assignee: Sumitomo Pharma Co Ltd
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Filing: 1975-01-30
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Granted: 1977-04-12
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Expires: 1995-01-30
Abstract
Abstract Piperazine derivatives of the following formula <IMAGE> wherein A and B are a carbon atom or a nitrogen atom except the case where both A and B are nitrogen atoms, R1 is hydrogen atom, an alkyl group having 1 to 4 carbon atoms, a benzyl group or acetyl group; R2 is a hydrogen atom, an alkyl group having 1 to 4 carbon atoms, a benzyl group or a vinyl group; and R3 is hydrogen atom or an alkyl group having 1 to 6 carbon atoms, and pharmaceutically acceptable salts thereof.
Inventors
- 👤 Shinsaku Minami
- 👤 Jun-ichi Matsumoto
- 👤 Minoru Sugita
- 👤 Masanao Shimizu
- 👤 Yoshiyuki Takase
- 👤 Shinichi Nakamura
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-28 07:47
CPC Classifications
C; C07; C07D; C07D401/00; C07D401/02; C07D401/04; C07D215/00; C07D215/02; C07D215/16; C07D215/48; C07D215/54; C07D215/56; C07D471/00; C07D471/02; C07D471/04
Claims Analysis
Total Claims: 17
Claim 1
Independent Claim
73 words
A compound of the formula ##STR34##wherein: A and B are carbon or nitrogen, provided that A and B are not both nitrogen; R 1 is hydrogen, alkyl having 1 to 4 carbon atoms, benzyl, or acetyl; R 2 is hydrogen, alkyl having 1to 4 carbon atoms, benzyl, or vinyl and R 3 is hydrogen or alkyl having 1 to 6 carbon atoms; or the pharmaceutically acceptable acid addition or alkali metal salts thereof.
Claim 2
Dependent Claim
73 words
A compound of the formula ##STR34##wherein: A and B are carbon or nitrogen, provided that A and B are not both nitrogen; R 1 is hydrogen, alkyl having 1 to 4 carbon atoms, benzyl, or acetyl; R 2 is hydrogen, alkyl having 1to 4 carbon atoms, benzyl, or vinyl and R 3 is hydrogen or alkyl having 1 to 6 carbon atoms; or the pharmaceutically acceptable acid addition or alkali metal salts thereof.
Claim 3
Dependent Claim
26 words
The compound or salt of claim 1 wherein: R 1 is hydrogen, methyl, or ethyl; R 2 is ethyl, or vinyl; and R 3 is hydrogen.
Claim 4
Dependent Claim
13 words
The compound or salt of claim 2 wherein A and B are carbon.
Claim 5
Dependent Claim
13 words
The compound of claim 2 wherein A is carbon and B is nitrogen.
Claim 6
Dependent Claim
15 words
The compound or salt of claim 2 wherein A is nitrogen and B is carbon.
Claim 7
Dependent Claim
12 words
The compound or salt of claim 2 wherein R 2 is vinyl.
Claim 8
Dependent Claim
21 words
The compound or salt of claim 1 wherein: R 1 is hydrogen; R 2 is ethyl; and R 3 is hydrogen.
Claim 9
Dependent Claim
21 words
The compound or salt of claim 1 wherein: R 1 is methyl; R 2 is ethyl; and R 3 is hydrogen.
Claim 10
Dependent Claim
12 words
The compound or salt of claim 1 wherein R 2 is vinyl.
Claim 11
Dependent Claim
16 words
The compound or salt of claim 2 wherein A is carbon and R 2 is vinyl.
Claim 12
Dependent Claim
11 words
The compound or salt of claim 10 wherein B is nitrogen.
Claim 13
Dependent Claim
11 words
The compound or salt of claim 10 wherein B is carbon.
Claim 14
Dependent Claim
12 words
The compound or salt of claim 11 wherein R 1 is hydrogen.
Claim 15
Dependent Claim
12 words
The compound or salt of claim 12 wherein R 1 is methyl.
Claim 16
Dependent Claim
12 words
The compound or salt of claim 12 wherein R 1 is ethyl.
Claim 17
Dependent Claim
42 words
An antibacterial pharmaceutical composition comprising: an active ingredient consisting essentially or salt of the compound or salt of claim 2 present in a pharmaceutically effective amount; and in admixture therewith at least one pharmaceutically acceptable adjuvant which is inert to the compound.
References Cited (Backward Citations)
US3149104A
Cited
GB1129358A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1980-04-11 | 1980-10-11 | 1981-04-12 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1984-04-11 | 1984-10-11 | 1985-04-12 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1988-04-11 | 1988-10-11 | 1989-04-12 | $7700.00 | Window Closed / Lapsed |