Coumarins containing sulphonylamino groups
AssigneeBayer Aktiengesellschaft
InventorsCarl Wolfgang Schellhammer, Florin Seng
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Abstract
Coumarins of the formula ##STR1## wherein R denotes an alkyl radical with 1 to 4 C atoms, which is optionally substituted by halogen atoms or a phenyl radical which is optionally substituted by halogen, C.sub.1 -C.sub.4 -alkyl or C.sub.1 -C.sub.4 -alkoxy and R' represents hydrogen, a phenyl radical which is optionally substituted by nitro, C.sub.1 -C.sub.4 alkyl, halogen or C.sub.1 -C.sub.4 -alkoxy, the tetralin-6-yl radical or an aromatic heterocyclic radical which is bonded via C or N and which can contain further substituents, for example C.sub.1 -C.sub.4 -alkyl groups and halogen atoms Are valuable intermediates for the production of dyestuffs and optical brightening agents.
Claims7
A coumarin of the formula ##STR7## wherein R is C.sub.1 -C.sub.4 -alkyl unsubstituted or substituted with halogen;
- or phenyl unsubstituted or substituted with halogen, C.sub.1 -C.sub.4 -alkyl, or C.sub.1 -C.sub.4 -alkoxy;
- and
- R' is an aromatic heterocyclic radical selected from the group consisting of benzofuran-2-yl, 1,2,4-triazol-1-yl, pyrazol-1-yl, 4-chloropyrazol-1-yl and benzotriazol-2-yl, each of which is unsubstituted or subtituted with C.sub.1 -C.sub.4 -alkyl or halogen.
Dependencies are inferred from the claim text.