反应详情

To a mixture of (R)-3-bromo-4-chloro-N-(1-(3-chlorophenyl)ethyl)benzamide 32 (0.634 g, 1.7 mmol), Pd2(dba)3 (0.100 g, 0.11 mmol), and 4,5-bis(diphenylphosphino)-9,9-dimethyl-9H-xanthene (0.125 g, 0.22 mmol) was added benzenethiol (0.173 mL, 1.7 mmol), dioxane (4.5 mL) and N-ethyl-N-isopropylpropan-2-amine (0.590 mL, 3.4 mmol). The reaction mixture was degassed and heated to reflux. After 18 h, the reaction mixture was diluted with EtOAc, washed with water (1×), brine (1×), dried over MgSO4, filtered, and concentrated in vacuo. Purification by flash column chromatography on silica gel (eluted with 5% to 30% EtOAc in hexanes) gave (R)-4-chloro-N-(1-(3-chlorophenyl)ethyl)-3-(phenylthio)benzamide 33 (0.631 g, 92% yield) as a white solid. Mass spectrum: calculated for C21H17Cl2NOS 401.0. found 402.1 (M++1).

1. customThe reaction mixture was degassed
2. temperatureheated to reflux
3. additionthe reaction mixture was diluted with EtOAc
4. washwashed with water (1×), brine (1×)
5. dry with materialdried over MgSO4
6. filtrationfiltered
7. concentrationconcentrated in vacuo
8. customPurification by flash column chromatography on silica gel (eluted with 5% to 30% EtOAc in hexanes)