2,4,6-Triiodophenol → (2,4,6-Triiodophenyl)-2,2,3,4,4-pentafluoro-3,4-dibromo-butyrate

Participants

Reaction Conditions

Reaction Steps

100 grams of triiodophenol were dissolved in 100 ml of pyridine with warming to 50° C. 75 grams of 2,2,3,4,4-pentafluoro-3,4-dibromo-butyryl chloride were added dropwise through a dropping funnel with stirring at such a rate that the temperature did not rise above 65° C. The mixture was stirred at 50° C. for an additional 30 minutes, then overnight at room temperature. The mixture was washed in a separatory funnel three times with 500 ml of DI water, then filtered through a column of silica and the solvent evaporated. The material was then chromatographed on a column of silica using FREON 113 (trichlorotrifluroethane) as eluent. Chromatography on silica gave 75.5 grams of material 99% pure. The material solidified at room temperature and has a melting point of 50° C. I.R.(ν, in cm-1)=3050, 3090 (Ar--H); 1800 (C=O); 1570, 1415 (Ar C=C). m/e 62 (47, C5H2); 69 (18%, CF3); 129 (22, CF2Br); 131 (70, CF2Br and C3F5); 189 (60%, C5H2I); 344 (56%, 471 (100%, C6H2I3O).

Provenance & Evidence