Hydrazone compounds, their preparation and use

Details Hydrazone compounds, their preparation and use Hydrazone compounds, their preparation and use

C - Chemistry, Metallurgy

09

B

260/196.5

C09B 47/04 (2006.01) C09B 43/00 (2006.01) C09B 47/26 (2006.01) C09B 56/14 (2006.01)

Patent

CA 1104565

Astract of the Disclosure New phthalocyanine hydrazones having at least one group of the formula Image wherein R3, R4 and R5 denote optionally substituted alkyl, and R3 additionally denotes hydrogen and ar is a divalent aromatic or araliphatic radical, are prepared by diazotizing phthalocyanine amines having at least one group of the formula Image wherein the amino group is linked to an aromatic C atom of the radical ar and coupling the diazonium compound with a succinic acid derivatives of the formula V Image wherein Z denotes hydrogen or an optionally substituted hydrocarbon radical. The new compounds are valuable inter- mediates for the synthesis of phthalocyanine azo dyestuffs.

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