5-Iodosalicylic acid → N-cyclopropyl-2-hydroxy-5-iodo-benzamide

Beteiligte Stoffe

Reaktionsschritte

13bh) A mixture of 2.64 g of 2-hydroxy-5-iodo-benzoic acid, 0.69 g of cyclopropylamine and 3.65 g of carbon tetrabromide in 40 ml of methylene chloride is treated portionwise at room temperature with 2.62 g of triphenylphosphine. After 2 hrs. the mixture is filtered and the filtrate is concentrated. Chromatography on silica gel with ethyl acetate/cyclohexane 1:4 gives 550 mg of crude N-cyclopropyl-2-hydroxy-5-iodo-benzamide. Yield: 18%.

Herkunft & Nachweise