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US4125615A Expired / Lapsed US ⏱️ 0.0 years remaining

2-[4-(P-Aminobenzyl)-1-piperazinyl]-8-ethyl-5,8-dihydro-5-oxopyrido[2,3-d]py

Assignee: Sumitomo Pharma Co Ltd
•
Filing: 1977-07-20
•
Granted: 1978-11-14
•
Expires: 1997-07-20
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Abstract

Abstract 2-[4-(P-Aminobenzyl)-1-piperazinyl]-8-ethyl-5,8-dihydro-5-oxopyrido-[2 ,3-d]pyrimidine-6-carboxylic acid, and its pharmaceutically acceptable salt. This novel compound can be prepared by reacting a compound of the formula <IMAGE> (II) wherein R is a hydrogen atom or an alkyl group having 1 to 6 carbon atoms, with a compound of the formula <IMAGE> (III) wherein R1 is an amino group or a group convertible to the amino group, and X is a reactive moiety capable of splitting off together with the hydrogen atom at the 4-position of the 1-piperazinyl group of the compound of the formula (II). Pharmaceutical compositions containing aforesaid compounds as active ingredients are useful for treating a bacterial infection of man and other warm-blooded animals.

Inventors

  • 👤 Jun-ichi Matsumoto

Bibliographic Details

Application Number —
Jurisdiction US
Data Source google_patents
Last Synchronized 2026-11-01 17:50
CPC Classifications
C; C07; C07D; C07D471/00; C07D471/02; C07D471/04; A; A61; A61P; A61P31/00; A61P31/04

Claims Analysis

Total Claims: 8
Claim 1
Independent Claim 2 words
2-[4-(p-Aminobenzyl)-1-piperazinyl]-8-ethyl-5,8-dihydro-5-oxopyrido-[2,3-d]pyrimidine-6-carboxylic acid.
Claim 2
Dependent Claim 2 words
2-[4-(p-Aminobenzyl)-1-piperazinyl]-8-ethyl-5,8-dihydro-5-oxopyrido-[2,3-d]pyrimidine-6-carboxylic acid.
Claim 3
Dependent Claim 7 words
A pharmaceutically acceptable salt of 2-[4-(p-aminobenzyl)-1-piperazinyl]-8-ethyl-5,8-dihydro-5-oxopyrido[2,3-d]pyrimidine-6-carboxylic acid.
Claim 4
Dependent Claim 7 words
A pharmaceutically acceptable salt of 2-[4-(p-aminobenzyl)-1-piperazinyl]-8-ethyl-5,8-dihydro-5-oxopyrido[2,3-d]pyrimidine-6-carboxylic acid.
Claim 5
Dependent Claim 26 words
A pharmaceutical composition comprising from 10 to 60% by weight of 2-[4-(p-aminobenzyl)-1-piperazinyl]-8-ethyl-5,8-dihydro-5-oxopyrido[2,3-d]pyrimidine-6-carboxylic acid or a pharmaceutically acceptable salt thereof in admixture with a pharmaceutically acceptable carrier.
Claim 6
Dependent Claim 26 words
A pharmaceutical composition comprising from 10 to 60% by weight of 2-[4-(p-aminobenzyl)-1-piperazinyl]-8-ethyl-5,8-dihydro-5-oxopyrido[2,3-d]pyrimidine-6-carboxylic acid or a pharmaceutically acceptable salt thereof in admixture with a pharmaceutically acceptable carrier.
Claim 7
Independent Claim 35 words
A method of treating a bacterially infected patient which comprises administering to such patient 2-[4-(p-aminobenzyl)-1-piperazinyl]-8-ethyl-5,8-dihydro-5-oxopyrido[2,3-d]pyrimidine-6-carboxylic acid or a pharmaceutically acceptable salt thereof in a daily dose of from 100 mg to 5 g for adult.
Claim 8
Independent Claim 35 words
A method of treating a bacterially infected patient which comprises administering to such patient 2-[4-(p-aminobenzyl)-1-piperazinyl]-8-ethyl-5,8-dihydro-5-oxopyrido[2,3-d]pyrimidine-6-carboxylic acid or a pharmaceutically acceptable salt thereof in a daily dose of from 100 mg to 5 g for adult.

References Cited (Backward Citations)

US3320257A Cited
US3770742A Cited
US3673184A Cited
US3950338A Cited
US3887557A Cited
US3992380A Cited

USPTO Annuity & Maintenance Windows

Annuity Stage Window Opens Payment Deadline Surcharge Period Until Estimated Fee Status
3.5 Years (Year 4) 1981-11-13 1982-05-15 1982-11-14 $2000.00 Window Closed / Lapsed
7.5 Years (Year 8) 1985-11-13 1986-05-15 1986-11-14 $3760.00 Window Closed / Lapsed
11.5 Years (Year 12) 1989-11-13 1990-05-15 1990-11-14 $7700.00 Window Closed / Lapsed

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