Sodium Iodide → Methyl 5-iodo-1-benzothiophene-2-carboxylate

Participants

Reaction Steps

Under an argon atmosphere 0.35 g (1.84 mmol) of CuI, 5.53 g (36.88 mmol) of NaI, and 0.39 mL (3.67 mmol) of N,N′-dimethylethylenediamine were added to a solution of 5.0 g (18.4 mmol) of methyl 5-bromobenzo[b]thiophen-2-carboxylate in 18 mL of 1,4-dioxane and after rinsing again with argon the reaction mixture was heated overnight to 110° C. After cooling, the reaction mixture was combined with 30% aqueous ammonia and water, exhaustively extracted with EtOAc, and the combined organic phases were twice washed with water and dried over magnesium sulfate. After the desiccant and solvent had been eliminated, the residue was triturated with DIPE and MTBE, suction filtered, and dried in the air. Yield: 3.4 g (58% of theoretical); C10H7IO2S (M=318.132); calc.: molpeak (M)+: 318; found: molpeak (M)+: 318; HPLC-MS: 6.4 minutes (method B).

Provenance & Evidence