Synlett

Novel synthesis of metal-free phthalocyanines from phthalimides and phthalic anhydrides with hexamethyldisilazane

H Uchida, H Yoshiyama, PY Reddy, S Nakamura…

Index: Uchida, Hitoshi; Yoshiyama, Hideyuki; Reddy, Paidi Yella; Nakamura, Shuichi; Toru, Takeshi Synlett, 2003 , # 13 p. 2083 - 2085

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Citation Number: 17

Abstract

Under similar reaction conditions, tert-butyl-, 4,5-dichloro- and 3,4,5,6-tetrachlorophthalimides gave the corresponding phthalocyanines in good to moderate yields. Crude metal-free phthalocyanines were purified as follows: For 3a, 3c, [15] and 3d [10] the reaction mixture obtained was dissolved in conc. H 2 SO 4 and the resulting solution was poured into cold water. The precipitates were collected, washed with water thoroughly, and further purified by soxhlet extractor with ...

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