Process for preparing disazo dyes with bis-anilino methane coupl

Details Process for preparing disazo dyes with bis-anilino methane coupl Process for preparing disazo dyes with bis-anilino methane coupl

1983-01-14

1988-07-26

Higel, Floyd D.

Organic compounds -- part of the class 532-570 series

Organic compounds

Azo

534753, 534761, 534775, 534791, 534887, C09B 3112, C09B 3900, C09B 4100, C09B 4300

Patent

active

047601337

ABSTRACT:
A process for preparing a disazo dye represented by the following formula: ##STR1## wherein R.sup.1 and R.sup.2 each represents a hydrogen atom, a halogen atom, a nitro group, a trifluoromethyl group, a lower alkoxycarbonyl group or a lower alkylsulfonyl group, R.sup.3 represents a lower alkyl or allyl group which may optionally have a substituent or substituents, and R.sup.4 represents a lower alkyl or allyl group having a substituent or substituents, which comprises diazotizing an amine represented by the following formula: ##STR2## wherein R.sup.1 and R.sup.2 are the same as defined above, and coupling the diazotized product with a bis(N,N-di-substituted anilino)methane represented by the following formula: ##STR3## wherein R.sup.3 and R.sup.4 are the same as defined above.

REFERENCES:
patent: 989953 (1911-04-01), Dressel et al.
patent: 4180503 (1979-12-01), Vor der Bruck et al.
patent: 4207233 (1980-06-01), Seybold et al.
Pinnow, Ber. Deut. Chem. Gesell., vol. 27, pp. 3161 to 3167 (1894).
Scharwin et al., Ber. Deut Chem Gesell., vol. 41, pp. 2056 to 2060 (1908).
Ziegler et al., Monatshefte fur Chem., vol. 84, pp. 610 to 618 (1953).
Zollinger, "Azo and Diazo Chemistry", p. 239 (1961).

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