16-membered N2S2-donor macrocycles linked to a 2-pyridinyl methyl moiety

A metal-free phthalocyanine (H2Pc) containing four diazadithiamacrocycles a with 2-pyridinyl methyl groups attached was synthesized via cyclotetramerization of 4,5-bis{2-[13(2-pyridinylmethyl)-1, 9-dithia-5,13-diazacyclohexadecanyl-5]ethyl} thiophthalonitrile in the presence of DBU as a strong organic base. New compounds were characterized by a combination of elemental analysis, H-1 NMR, C-13 NMR, IR, UV/vis, and MS spectral data. (C) 2013 Elsevier Ltd. All rights reserved