反应详情

To a solution of (S)-5-(4-cyclohexyl-phenoxymethyl)-4,5-dihydro-oxazol-2-ylamine (0.48 g, 1.74 mmol) (prepared in accordance with the procedures described in Steps 1 and 2 of Example 1 and starting from R-epichlorohydrin and 4-cyclohexylphenol) in ethanol (16 mL) was added 2-formyl-3-methyl-butyric acid ethyl ester (0.33 g, 2.1 mmol). The reaction mixture was heated at reflux for 24 hours. It was then concentrated to remove solvent and loaded on silica gel column. Chromatography with (1-5%) 2-propanol/methylene chloride gave 0.144 g of the title compound. [α]D25 −15.80 (c 0.5, CHCl3).

1. temperatureThe reaction mixture was heated
2. temperatureat reflux for 24 hours
3. concentrationIt was then concentrated
4. customto remove solvent