Regioisomer-Free C4h β-Tetrakis(tert-butyl)metallo-phthalocyanines: Regioselective Synthesis and Spectral Investigations

نویسندگان

  • Norihito Iida
  • Kenta Tanaka
  • Etsuko Tokunaga
  • Hiromi Takahashi
  • Norio Shibata
چکیده

Metal β-tetrakis(tert-butyl)phthalocyanines are the most commonly used phthalocyanines due to their high solubility, stability, and accessibility. They are commonly used as a mixture of four regioisomers, which arise due to the tert-butyl substituent on the β-position, and to the best of our knowledge, their regioselective synthesis has yet to be reported. Herein, the C 4h -selective synthesis of β-tetrakis(tert-butyl)metallophthalocyanines is disclosed. Using tetramerization of α-trialkylsilyl phthalonitriles with metal salts following acid-mediated desilylation, the desired metallophthalocyanines were obtained in good yields. Upon investigation of regioisomer-free zinc β-tetrakis(tert-butyl)phthalocyanine using spectroscopy, the C 4h single isomer described here was found to be distinct in the solid state to zinc β-tetrakis(tert-butyl)phthalocyanine obtained by a conventional method.

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Regioisomer-Free C4h b-Tetrakis(tert-butyl)metallo- phthalocyanines: Regioselective Synthesis and Spectral Investigations

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عنوان ژورنال:

دوره 4  شماره 

صفحات  -

تاریخ انتشار 2015