Chemistry of carbon compounds – Miscellaneous organic carbon compounds – C-metal
Patent
1974-06-17
1976-07-20
Sneed, Helen M. S.
Chemistry of carbon compounds
Miscellaneous organic carbon compounds
C-metal
2602475H, 260281N, 260282, 260288R, 26027356, 260307D, 260309, 26032611R, 2603265C, 260566R, 2602471R, 2602475R, 2602475F, C09B 302
Patent
active
039706753
ABSTRACT:
Dyestuffs of the formula (I) ##EQU1## WHEREIN F represents a ring system with at least 3 rings which are angularly condensed with one another, n is 1, 2 or 3, and R, R.sub.1 and R.sub.2 represent optionally substituted alkyl groups which can be interrupted by heteroatoms and also represent cycloalkyl, aralykyl, aryl or heterocyclic radicals, R and R.sub.1 can also represent hydrogen atoms, R.sub.1 and R.sub.2, together with the nitrogen atom, are able to form a ring with 5 or 6 members, and R and R.sub.2 can combine to form a nitrogen-containing heterocycle.
REFERENCES:
patent: 1565229 (1925-12-01), Kalischer et al.
patent: 1628280 (1927-05-01), Schmidt et al.
patent: 2059647 (1936-11-01), Perkins
patent: 3184482 (1965-05-01), Steiger
Dengler Siegfried
Loew Peter
Schwander Hansrudolf
Zickendraht Christian
Almaula Prabodh I.
Ciba-Geigy Corporation
Kolodny Joseph G.
McC. Roberts Edward
Sneed Helen M. S.
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