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The synthesis of zinc (2‐diethoxyphosphorylethynyl)porphyrins and their self‐organization in solid state and in solution are reported. Copper‐cocatalyzed Sonogashira reaction involving bromoporphyrins and diethyl ethynylphosphonate was used to prepare meso‐substituted derivatives Zn4 and Zn5 bearing one or two ethynylphosphonate substituents at the macrocycle. In contrast, copper‐free Sonogashira...
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