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—
JurisdictionUS
Data Sourcegoogle_patents
Last Synchronized2026-10-24 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.