反应详情

温度

110 °C

N-(5-Iodo-pyridin-2-yl)-2,2-dimethyl-propionamide (example 39, step 1) (5.8 g, 19.1 mmol) was dissolved in 30 ml of toluene and Lawesson's reagent (7.7 g, 19.1 mmol, 1 equiv.) was added at room temperature. The reaction mixture was stirred for 48 hours at 110° C. The crude product was purified by flash chromatography by directly loading the cooled toluene reaction mixture onto a 300 g silica gel column and eluting with heptane:ethyl acetate 100:0->80:20. The desired N-(5-iodo-pyridin-2-yl)-2,2-dimethyl-thiopropionamide was obtained as a yellow oil (5.1 g, 75% yield), MS: m/e=321.0 (M+H+).

1. customThe crude product was purified by flash chromatography
2. customthe cooled toluene reaction mixture onto a 300 g silica gel column
3. washeluting with heptane:ethyl acetate 100:0->80:20