Water → 5,10,15-tris-(4-Hydroxy-phenyl)-20-(4-tridecyloxy-phenyl)-porphyrin

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Reaction Steps

5,10,15,20-tetrakis-(4-Hydroxy-phenyl)-porphyrin (400 mg, 0.59 mmol) is dissolved and K2CO3 (1.0 g, 7.1 mmol) is suspended in DMF (75 mL). To the vigorously stirred reaction mixture a solution of 1-bromotridecane (0.1 mL, 0.45 mmol) in DMF (10 mL) is added dropwise at 50° C. during 30 mins and the mixture is then heated for 1.5 h. The reaction mixture is cooled to room temperature and poured into water (150 mL). The porphyrins are extracted with ethyl acetate (100 mL) and the extract washed with brine (3×50 mL) and dried (Na2SO4). After evaporation of solvent, the residue is dissolved in toluene:ethanol (1:1, by vol., ca. 10 mL) and purified by chromatography using a column (200 g) of silica gel (Merck 60) with toluene as the eluent. After the elution of the first three compounds, the eluent is changed to toluene:ethyl acetate (2:1, by vol.). The fifth compound eluted is collected and dried under high vacuum to yield product as violet crystals.

Provenance & Evidence