Ureylene naphthalene sulfonic acid intermediates
AssigneeAmerican Cyanamid Company
InventorsRansom B. Conrow, Seymour Bernstein
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Abstract
Ureylenebis substituted phenylenecarbonylimino symmetrical phenenylbiscarbonylimino dinaphthalenepoly-sulfonic acid salts, and nitro and amino substituted benzamido phenylenedicarbonyl dinaphthalenepoly-sulfonic acid salts that are new intermediates for the preparation of the active ureides, which have complement inhibiting activity.
Claims3
A compound of the formula:
- ##STR4## wherein R is selected from the group consisting of nitro and amino;
- and A is selected from the group consisting of alkali metal.
The compound according to claim 1, 8,8'-[5-(4-nitro-2-sulfobenzamido)-1,3-phenylenedicarbonylimino]di-1,3,6-n aphthalenetrisulfonic acid heptasodium salt.
The compound according to claim 1, 8,8'-[5-(4-amino-2-sulfobenzamido)-1,3-phenylenedicarbonylimino]di-1,3,6-n aphthalenetrisulfonic acid heptasodium salt.
Dependencies are inferred from the claim text.