Tetraindolylheptamethine dyestuffs

Details Tetraindolylheptamethine dyestuffs Tetraindolylheptamethine dyestuffs

1988-10-24

1991-05-21

Springer, David B.

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

Organic compounds

Heterocyclic carbon compounds containing a hetero ring...

546201, 546176, 546273, 282 27A, 4384111, 438480, 4385371, 8654, 427144, 548217, 548159, 548336, 430495, C07D40306

Patent

active

050177079

ABSTRACT:
Tetraindolylheptamethine ethers and alcohols of the isomeric formulae ##STR1## and ##STR2## and dyestuffs of the formula ##STR3## in which A, B, D and E denote ##STR4## and D'.sup..sym. denotes ##STR5## and the remaining symbols have the meanings given in the description, are used in pressure- and heat-sensitive recording materials.

REFERENCES:
patent: 2154926 (1939-04-01), Wolff et al.
patent: 2158287 (1935-05-01), Konig et al.
patent: 3957288 (1976-05-01), Lemahieu et al.

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