| 摘要 |
1,164,743. Anthraquinone dyes. SANDOZ Ltd. 12 Jan., 1967 [21 Jan., 1966; 25. Jan., 1966; 22 Dec., 1966], No. 1688/67. Heading C4P. The invention comprises compounds of the formula which are free from sulphonic acid groups, where R is H, alkyl, aralkyl, cycloalkyl or phenyl and may be substituted, K<SP>+</SP> stands for a group of the formula X<SP>-</SP> is an anion, R 1 and R 2 are alkyl, cycloalkyl or aralkyl and may be substituted or together complete a heterocyclic ring, R 3 and R 4 are H, or cycloalkyl or aralkyl and may be substituted or R 1 and R 3 and/or R 2 and R 4 complete heterocyclic rings and R 5 , R 6 and R 7 are alkyl, cycloalkyl or aralkyl and may be substituted or R 5 and R 6 or R 5 , R 6 and R 7 complete a heterocyclic ring. The compounds are prepared by reacting one mole of a compound of the formula where E is the acid radical of an ester with one mole of a compound of the formula |
