Preparation of magnesium azaphthalocyanines by cyclotetramerisation of S-substituted 4,5-disulfanylpyrazine-2,3-dicarbonitriles

Four novel S-substituted 4,5-disulfanylpyrazine-2,3-dicarbonitriles have been obtained in a multistep synthesis from diaminomaleonitrile. Two of these dicarbonitriles, with ethyl or benzyl S-substituents, give pure magnesium azaphthalocyanines in good yields when reacted with magnesium propoxide in...

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Published inActa chemica Scandinavica (Copenhagen. 1989) Vol. 50; no. 12; pp. 1153 - 1156
Main Authors Morkved, EH, Holmaas, LT, Kjosen, H, Hvistendahl, G
Format Journal Article
LanguageEnglish
Published COPENHAGEN Wiley 1996
Subjects
Biochemistry & Molecular Biology
Chemistry
Chemistry, Multidisciplinary
Life Sciences & Biomedicine
Physical Sciences
Science & Technology
PHOTODYNAMIC THERAPY
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Summary:Four novel S-substituted 4,5-disulfanylpyrazine-2,3-dicarbonitriles have been obtained in a multistep synthesis from diaminomaleonitrile. Two of these dicarbonitriles, with ethyl or benzyl S-substituents, give pure magnesium azaphthalocyanines in good yields when reacted with magnesium propoxide in propanol and dioxane. Aromatic S-substituents are less stable during the reaction conditions used for cyclisations, and product mixtures are obtained.
ISSN:0904-213X
DOI:10.3891/acta.chem.scand.50-1153