Patent EP0041644A2 successfully refreshed from Google Patents.
EP0041644A2
Expired / Lapsed
EP
⏱️ 0.0 years remaining
Salts of 2-hydroxymalonato diammine platinum (II) compounds, process for preparing said compounds and pharmaceutical compositions containing said compounds
Assignee: Bristol Myers Co
•
Filing: 1981-05-25
•
Granted: —
•
Expires: 2001-05-25
Abstract
Abstract Disclosed are water-soluble salts otthe known antitumor agents 2-hydroxymalonato diammine platinum (II), 2-hydroxymalonato (1,2-diaminocyclohexane)platinum (II) and 2-hydroxymalonato (1,1-diaminomethylcyclohexane)-platinum (II). The novel sodium and ammonium salts of the present invention possess high water-solubility, thus allowing intravenous dosage forms to be prepared for treatment of mammalian tumors.
Inventors
- 👤 Murray A. Kaplan
- 👤 Alphonse P. Granatek
Bibliographic Details
Application Number
—
Jurisdiction
EP
Data Source
google_patents
Last Synchronized
2026-10-29 06:38
CPC Classifications
C; C07; C07F; C07F15/00; C07F15/0006; C07F15/0086; C07F15/0093; C07H; C07H13/00; C07H13/02; C07H13/10; A; A61; A61P; A61P3/00; A61P3/06
Claims Analysis
Total Claims: 17
Claim 1
Independent Claim
8 words
The ammonium salt of 2-hydroxymalonato diammine platinum (II).
Claim 2
Dependent Claim
8 words
The ammonium salt of 2-hydroxymalonato diammine platinum (II).
Claim 3
Dependent Claim
8 words
The sodium salt of 2-hydroxymalonato diammine platinum (II).
Claim 4
Dependent Claim
8 words
The sodium salt of 2-hydroxymalonato diammine platinum (II).
Claim 5
Dependent Claim
6 words
The ammonium salt of 2-hydroxymalonato(1,2-diaminocyclohexane)platinum (II).
Claim 6
Dependent Claim
6 words
The ammonium salt of 2-hydroxymalonato(1,2-diaminocyclohexane)platinum (II).
Claim 7
Dependent Claim
6 words
The sodium salt of 2-hydroxymalonato(1,2-diaminocyclohexane)-platinum (II).
Claim 8
Dependent Claim
6 words
The sodium salt of 2-hydroxymalonato(1,2-diaminocyclohexane)-platinum (II).
Claim 9
Dependent Claim
8 words
The ammonium salt of 2-hydroxymalonato (1,1-diamino- methyl-cyclohexane)platinum (II).
Claim 10
Dependent Claim
8 words
The ammonium salt of 2-hydroxymalonato (1,1-diamino- methyl-cyclohexane)platinum (II).
Claim 11
Dependent Claim
7 words
The sodium salt of 2-hydroxymalonato (1,1-diaminomethylcyclohexane)platinum (II).
Claim 12
Dependent Claim
7 words
The sodium salt of 2-hydroxymalonato (1,1-diaminomethylcyclohexane)platinum (II).
Claim 13
Dependent Claim
73 words
Process for preparing the ammonium or sedium salt according to claims 1 to 6, which comprises the steps of (1) providing a suspension of 2-hydroxymalonato diammine platinum (II), or of 2-hydroxymalonato-(1,2-diamminocyclohexane)platinum (II) or of 2-hydroxymalonato-(1,1-diaminomethylcyclohexane)-platinum (II) in water; (2) adding to said suspension with stirring at least about one equivalent of ammonium hydroxide or sodium hydroxide to form a solution; and (3) recovering the desired ammonium or sodium salt, respectively, from said solution.
Claim 14
Dependent Claim
13 words
The process according to claim 7 wherein the dalt is recovered by lyophilization.
Claim 15
Dependent Claim
18 words
The process according to claim 7 wherein the salt is recovered by solvent precipitation with acetone or isopropanol.
Claim 16
Dependent Claim
23 words
The process according to claim 7, 8 or 9 wherein the solution prepared in step (2) is filtered prior to the recovery step.
Claim 17
Dependent Claim
18 words
Pharmaceutical composition comprising at least one compound according to claims 1 to 6 in a pharmaceutically acceptable carrier.
References Cited (Backward Citations)
No citation records indexed.
USPTO Annuity & Maintenance Windows
Maintenance schedule is calculated for granted US utility patents.