申请人:Bayer Aktiengesellschaft
公开号:US04069228A1
公开(公告)日:1978-01-17
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.
式为## STR1 ##的香豆素,其中R表示1至4个C原子的烷基基团,该基团可以选择性地由卤素原子或苯基基团取代,该苯基基团可以选择性地由卤素,C.sub.1-C.sub.4-烷基或C.sub.1-C.sub.4-烷氧基取代,R'表示氢,可以选择性地由硝基,C.sub.1-C.sub.4-烷基,卤素或C.sub.1-C.sub.4-烷氧基取代的苯基基团,四氢萘-6-基基团或通过C或N键结合的芳香族杂环基团,该基团可以包含进一步的取代基,例如C.sub.1-C.sub.4-烷基团和卤素原子,是生产染料和光亮剂的有价值的中间体。