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Metal-free (3b) and metallo-porphyrazines (3a, 3c, 3d) (MMg, Ni and Co) carrying eight functional tosylaminoethylthia-groups on peripheral positions have been synthesised for the first time from cyclotetramerization of 1,2-bis(2-tosylaminoethylthia)maleonitrile (2) in the presence of magnesium propoxide; the metal-free derivative 3b was obtained by treatment of 3a with trifluoroacetic acid and it...
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