反应详情

温度

110 °C

A mixture of 2-(3,4-dichloro-phenyl)-3-(3-hydroxy-cyclopentyl)-propionic acid methyl ester (25 mg, 0.08 mmol) and 2-aminothiazole (9.4 mg, 0.09 mmol) in a solution of magnesium methoxide in methanol (7.4 wt. %, 0.22 mL, 0.15 mmol) was heated to 110° C. for 18 h. At this time, the reaction mixture was cooled to 25° C. and then filtered through a pad of celite (methylene chloride as eluent). The filtrate was washed with a 1N aqueous hydrochloric acid solution. The organics were dried over sodium sulfate, filtered and then concentrated in vacuo. Flash chromatography (Merck Silica gel 60, 230–400 mesh, 75/25 ethyl acetate/hexanes) afforded 2-(3,4-dichloro-phenyl)-3-(3-hydroxy-cyclopentyl)-N-thiazol-2-yl-propionamide (16.4 mg, 54%) as light tan oil: EI-HRMS m/e calcd for C17H18Cl2N2O2S (M+H)+ 385.0537, found 385.0542.

1. temperatureAt this time, the reaction mixture was cooled to 25° C.
2. filtrationfiltered through a pad of celite (methylene chloride as eluent)
3. washThe filtrate was washed with a 1N aqueous hydrochloric acid solution
4. dry with materialThe organics were dried over sodium sulfate
5. filtrationfiltered
6. concentrationconcentrated in vacuo