Preparation of cationic methine dyestuffs

Details Preparation of cationic methine dyestuffs Preparation of cationic methine dyestuffs

1982-08-30

1985-04-23

Hollrah, Glennon H.

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

Organic compounds

Heterocyclic carbon compounds containing a hetero ring...

548455, 548490, 548494, 548427, 548504, C09B 2300

Patent

active

045131422

ABSTRACT:
A method of preparation of cationic dyestuffs having the formula ##STR1## wherein A, B, R, and R.sup.1 are defined in the specification carried out in the substantial absence of solvent and removing water formed in the reaction.

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