Method of producing polymethine dyes

Details Method of producing polymethine dyes Method of producing polymethine dyes

C - Chemistry, Metallurgy

09

B

C09B 23/14 (2006.01) C07C 213/02 (2006.01) C09B 23/08 (2006.01)

Patent

CA 2133031

ABSTRACT OF THE DISCLOSURE A method for producing polymethine dyes comprising the steps of: (a) reacting a 1,1-diaryl-2-metallo-ethene with an .omega.,.omega.,-diaryl- polyalkene-aldehyde in an anhydrous solvent under an inert atmosphere; and (b) neutralizing the reaction mixture from step (a) with an acid, thereby producing a polymethine dye.

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