Efficient Synthesis of Transition-Metal Phthalocyanines in Functional Ionic Liquids

S. M. S. Chauhan; Pratibha Kumari; Shweta Agarwal

doi:10.1055/s-2007-990879

PAPER

Efficient Synthesis of Transition-Metal Phthalocyanines in Functional Ionic Liquids

S. M. S. Chauhan*, Pratibha Kumari, Shweta Agarwal
Bioorganic Laboratory, Department of Chemistry, University of Delhi, Delhi 110 007, India
Fax: +91(11)27666845; e-Mail: smschauhan@chemistry.du.ac.in;

Abstract

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Abstract

The synthesis of transition-metal phthalocyanines by the reaction of substituted and unsubstituted phthalonitriles in the presence of 1,8-diazabicyclo[5.4.0]undec-7-ene (DBU) and metal salts in functional imidazolium, pyridinium and ammonium ionic liquids at 100-140 °C, is reported. The best yields of metallated phthalocyanines were achieved in butyl(2-hydroxyethyl)dimethylammonium bromide ionic liquid. Metallation of free-base phthalocyanines with different metal salts in the above ionic liquid has also been achieved in good yields.

Key words

phthalocyanines - ionic liquids - 1,8-diazabicyclo[5.4.0]undec-7-ene - DBU - metallations - complexes

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