4.4 Article

Ester-functionalized phthalonitriles and zinc phthalocyanines via palladium-catalyzed cyanation of 4,5-dichlorophthalates

期刊

TETRAHEDRON
卷 64, 期 19, 页码 4155-4161

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PERGAMON-ELSEVIER SCIENCE LTD
DOI: 10.1016/j.tet.2008.03.004

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phthalocyanines; phthalonitriles; palladium; cyanation

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Dicyanophthalates 3 were synthesized via Pd-catalyzed two-fold cyanation of the corresponding 4,5-dichlorophthalates with Zn(CN)(2), Appropriate modification of reaction conditions allowed one-pot synthesis of the corresponding zinc phthalocyanines 7 bearing eight peripheral alkyl ester groups. Powder X-ray diffraction study of a mesogenic zinc phthalocyanine bearing branched alkyl substituents revealed a rare case of a transition between two columnar rectangular liquid crystalline mesophases with different symmetry. (c) 2008 Elsevier Ltd. All rights reserved.

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