Organic compounds -- part of the class 532-570 series – Organic compounds – Chalcogen in the nitrogen containing substituent
Patent
1990-12-14
1995-06-27
Berch, Mark L.
Organic compounds -- part of the class 532-570 series
Organic compounds
Chalcogen in the nitrogen containing substituent
544343, 544348, C07D24146, C07D24142, C07D47104, C07D41310
Patent
active
054281610
ABSTRACT:
3,7-Diamo phenazine dye having at least one electron-withdrawing substituent on at least one of the groups attached to the amine groups at the 3- and 7-positions, provided that the algebraic sum of the para position Hammett sigma (.rho..sub.p) values for the groups attached to the nitrogen atoms of the amine groups at the 3- and 7-positions is more positive khan about -0.6. The group containing the electron-withdrawing substituent can be selected from
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Berch Mark L.
Griswold Gary L.
Kirn Walter N.
Minnesota Mining and Manufacturing Company
Weinstein David L.
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