Patent US3586978A successfully refreshed from Google Patents.
Patent US741325A successfully refreshed from Google Patents.
Patent US3984429A successfully refreshed from Google Patents.
← Back to Patent Explorer
US3984429A Expired / Lapsed US ⏱️ 0.0 years remaining

Pharmaceutically active compounds

Assignee: Allen and Hanburys Ltd
•
Filing: 1974-12-05
•
Granted: 1976-10-05
•
Expires: 1994-12-05
📄 Original PDF 🌐 Google Patents 🔄 Sync Now

Abstract

Abstract Compounds of the general formula: ##SPC1## Wherein X represents a 5-[1H]-tetrazolyl group, R 1 represents a hydrogen atom, a halogen atom, a hydroxyl group or a group --OR 2 , (in which R 2 may be a lower alkyl or alkenyl group containing from 1 to 6 carbon atoms optionally substituted by one or more hydroxy groups, an aryl group, an aryloxy group, an alkoxy group or a dialkylamino group) or a group --NR 3 R 4 , in which R 3 and R 4 which may be the same or different, represent a hydrogen atom, a lower alkyl group containing from 1 to 6 carbon atoms, optionally substituted by a hydroxy group, or R 3 and R 4 together with the nitrogen atom may form a ring which may optionally be substituted with another heteroatom and pharmaceutically acceptable salts thereof. These compounds have useful immunological activity and inhibit the release of spasmogen mediators.

Inventors

  • 👤 Mervyn Evan Peel
  • 👤 Alexander William Oxford

Bibliographic Details

Application Number —
Jurisdiction US
Data Source google_patents
Last Synchronized 2026-10-24 23:09
CPC Classifications
C; C07; C07D; C07D257/00; C07D257/02; C07D257/04

Claims Analysis

Total Claims: 10
Claim 1
Independent Claim 53 words
A compound of the formula ##SPC4## wherein: X is 5-[1H]-tetrazolyl, and R 1 is hydrogen or OR 2 , where R 2 is lower alkyl containing up to 6 carbon atoms or lower alkyl containing up to 6 carbon atoms substituted by one or more hydroxy groups; or a pharmaceutically acceptable salt thereof.
Claim 2
Dependent Claim 53 words
A compound of the formula ##SPC4## wherein: X is 5-[1H]-tetrazolyl, and R 1 is hydrogen or OR 2 , where R 2 is lower alkyl containing up to 6 carbon atoms or lower alkyl containing up to 6 carbon atoms substituted by one or more hydroxy groups; or a pharmaceutically acceptable salt thereof.
Claim 3
Dependent Claim 12 words
The compound of claim 1 wherein R 1 is OR 2 .
Claim 4
Dependent Claim 14 words
The compound of claim 1 which is 5-(anthraquinon-2-yl)-1H-tetrazole or a pharmaceutically acceptable salt thereof.
Claim 5
Dependent Claim 9 words
The dimethylaminoethanol salt of the compound of claim 3.
Claim 6
Dependent Claim 9 words
The sodium salt of the compound of claim 3.
Claim 7
Dependent Claim 15 words
A compound selected from the group consisting of 5-(Anthraquinon-2-yl)-1H-tetrazole dimethylaminoethanol salt, 5-(7-methoxy-anthraquinon-2-yl)-1H-tetrazole, and 5-[7-(2-hydroxyethoxy) anthraquinon-2-yl]-1H-tetrazole.
Claim 8
Dependent Claim 15 words
A compound selected from the group consisting of 5-(Anthraquinon-2-yl)-1H-tetrazole dimethylaminoethanol salt, 5-(7-methoxy-anthraquinon-2-yl)-1H-tetrazole, and 5-[7-(2-hydroxyethoxy) anthraquinon-2-yl]-1H-tetrazole.
Claim 9
Dependent Claim 8 words
The compound of claim 6 which is 5-(7-Methoxyanthraquinon-2-yl)-1H-tetrazole.
Claim 10
Dependent Claim 9 words
The compound of claim 6 which is 5-[7-(2-Hydroxyethoxy) anthraquinon-2-yl]-1H-tetrazole.

References Cited (Backward Citations)

No citation records indexed.

USPTO Annuity & Maintenance Windows

Annuity Stage Window Opens Payment Deadline Surcharge Period Until Estimated Fee Status
3.5 Years (Year 4) 1979-10-05 1980-04-05 1980-10-05 $2000.00 Window Closed / Lapsed
7.5 Years (Year 8) 1983-10-05 1984-04-05 1984-10-05 $3760.00 Window Closed / Lapsed
11.5 Years (Year 12) 1987-10-05 1988-04-05 1988-10-05 $7700.00 Window Closed / Lapsed

Assigned Categories & Tags

No categories assigned to this patent yet.

Assign Category Tag