Thieno-benzo-azole compounds useful as optical brightness

Details Thieno-benzo-azole compounds useful as optical brightness Thieno-benzo-azole compounds useful as optical brightness

C - Chemistry, Metallurgy

07

D

8/52, 260/305.05

C07D 495/04 (2006.01) C09B 57/00 (2006.01) D06L 3/12 (2006.01)

Patent

CA 1195984

Abstract Compounds of formula I Image I in which X is O or S; Y is O, S or NR3 where R3 is hydrogen or C1-4alkyl (preferably methyl or ethyl) and rings A and B may be further substituted by non-chromophoric substituents, are described. They are useful as optical brighteners.

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