反应详情

温度

25 °C

A mixture of 2-(3,4-dichloro-phenyl)-3-(2-hydroxy-cyclopentyl)-propionic acid methyl ester (prepared as in Example 25, 408.5 mg, 1.28 mmol), N-methylmorpholine N-oxide (679 mg, 5.79 mmol), and powdered molecular sieves (1.29 g) in methylene chloride (2.6 mL) at 25° C. was treated with tetrapropylammonium perrhuthenate (45 mg, 0.12 mmol). The resulting mixture was stirred at 25° C. for 2 h. At this time, the reaction was filtered through a pad of celite (ethyl acetate as eluent). The filtrate was concentrated in vacuo. Flash chromatography (Merck Silica gel 60, 230–400 mesh, 75/25 hexanes/ethyl acetate) afforded 2-(3,4-dichloro-phenyl)-3-(2-oxo-cyclopentyl)-propionic acid methyl ester (278.2 mg, 68.5%) as a clear oil: EI-HRMS m/e calcd for C15H16Cl2O3 (M+) 314.0476, found 314.0476.

1. customat 25° C.
2. filtrationAt this time, the reaction was filtered through a pad of celite (ethyl acetate as eluent)
3. concentrationThe filtrate was concentrated in vacuo