8.
    发明专利
    未知

    公开(公告)号:CH599216A5

    公开(公告)日:1978-05-12

    申请号:CH267076

    申请日:1976-03-03

    Applicant: BASF AG

    Abstract: 1535855 Lactones BASF AG 4 March 1976 [6 March 1975] 08652/76 Heading C4P [Also in Division C2] The invention comprises diazarhodamine lactones of the general formula wherein R 1 is H or C 1 -C 4 alkyl, R 2 is C 1 -C 4 alkyl, phenyl which may be substituted by one or two C 1 -C 3 alkyl, Cl or Br substituents which may be different, R 3 and R 4 are H, C 1 -C 7 alkyl, C 5 -C 7 cycloalkyl, phenylalkyl having 7-10 C atoms or alkoxyalkyl having 3-8 C atoms or the group -N(R 3 )R 4 may form a 5-, 6- or 7- membered saturated heterocyclic ring or a 6-membered saturated heterocyclic ring which contains one of the groups -O-, -S-or-N(R 6 )- where R 6 is H, methyl or ethyl, and R 5 is phenyl which may be substituted by C 1 -C 3 alkyl, methoxy, ethoxy, Cl or Br. They are prepared by condensing a benzoylbenzoic acid of the general formula with a 2-aminopyrimidine of the general formula wherein R 1 -R 5 are as above and R 7 and R 8 are independently H, C 1 -C 4 -alkyl or C-acyl having 2-7 C atoms. Condensation takes place at 60-160‹C. in an acid solvent in presence of one or more acidic dehydrating agents. The compounds are used in pressure sensitive copying processes.

    10.
    发明专利
    未知

    公开(公告)号:DE58908067D1

    公开(公告)日:1994-08-25

    申请号:DE58908067

    申请日:1989-09-20

    Applicant: BASF AG

    Abstract: Concentrated solutions of cationic dyes are prepared by treating the cationic dyes, which contain as the counterions the anions customarily present during their preparation, with alkali metal salts of monocarboxylic acids and with or without complexing agents in an aqueous glycol ether medium, and separating off the organic phase, which contains the dyes in the form of their monocarboxylic acid salts.

Patent Agency Ranking