Indolyl methylene leuco dyestuffs

Details Indolyl methylene leuco dyestuffs Indolyl methylene leuco dyestuffs

1975-01-23

1978-02-07

Love, Ethel G.

Chemistry of carbon compounds

Miscellaneous organic carbon compounds

C-metal

548374, 548364, 548358, 106 145, 106 21, 106 22, 260288R, 260296B, 260304R, 260308B, 260308R, 260310A, 260310R, 260315, 26032612R, 26032615, 542469, 544102, 544 37, 544 35, C07D20920, C07D40310, C07D40314

Patent

active

040726908

ABSTRACT:
Indolyl methylene leuco dyestuffs of the formula ##STR1## wherein X.sub.1 and X.sub.2 independently of the other, represent alkyl with 2 to 12 carbon atoms, alkenyl with at most 12 carbon atoms or phenylalkyl with 1 to 4 carbon atoms in the alkyl part, Y.sub.1 and Y.sub.2 independently of the other, represent hydrogen, alkyl with 1 to 12 carbon atoms or phenyl, Z represents alkyl with 1 to 12 carbon atoms, alkenyl with at most 12 carbon atoms, aryl, aralkyl or a heterocyclic residue and the rings A and B may be further substituted by cyano, nitro, halogen, alkyl having 1 to 4 carbon atoms, alkoxy having 1 to 4 carbon atoms or acyl with 1 to 8 carbon atoms, said methylene compounds are particularly useful as slow developing color formers in pressure-sensitive recording material and exhibit good light and air stability.

REFERENCES:
patent: 3527517 (1970-09-01), Hackman
Scott, "Chem. Abstracts", vol. 62 p. 517h (1965).
Treibs et al., "Tetrahedron Supp., ", No. 8, pt. 1. pp. 165-170 (1966) referred to in Chem. Abstracts 1967-1971 Subject Index, p. 15839 and Chem. Abstracts, vol. 66, p. 7964, #85220g.

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