Preparation of styryl dyes

Details Preparation of styryl dyes Preparation of styryl dyes

C - Chemistry, Metallurgy

09

B

C09B 23/14 (2006.01)

Patent

CA 2399164

Process for preparing compounds of the formula (I) Image where R1, R2 and R3 are independently hydrogen, alkyl or cycloalkyl, characterized in that an aldehyde of the formula (II) Image is reacted with CH2(CN)2 in the presence of butanol.

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