反应详情

温度

0 °C

To a solution of 230 mg (0.5 mmol) of 1-{1-[bis(4-chlorophenyl)methyl]azetidin-3-yl}-1-(3,5-difluorophenyl)acetone in 10 mL of THF was added slowly a solution of 0.42 mL (1.25 mmol) of methylmagnesium chloride (3.0M solution in THF) at −78° C. and stirred for 1 h. The reaction mixture was warmed to 0° C. for 1 h, followed by adding 1 g of sodium sulfate decahydrate to quench the reaction, and stirring for 1 h at rt. The quenched reaction mixture was filtered and the organic layer was dried over Na2SO4 and concentrated. The residue was purified by silica gel chromatography with hexanes/acetone=8:1 to afford racemic 1-{1-[bis(4-chlorophenyl)methyl]azetidin-3-yl}-1-(3,5-difluorophenyl)-2-methylpropan-2-ol as a white solid. The enantiomers were separated by a chiral column (OJ Column with hexanes/ethyl alcohol); 1H NMR(CDCl3) δ 1.06 (s, 3H), 1.15 (S, 3H), 2.29 (t, 1H, J=7.5 Hz), 6.73 (m, 3H), 7.21-7.33 (m, 8H); Mass Spectrum: m/e=476 (M+1 35Cl, 35Cl) and 478 (M+1 35Cl, 37Cl).

1. customto quench
2. customthe reaction
3. stirringstirring for 1 h at rt
4. customThe quenched reaction mixture
5. filtrationwas filtered
6. dry with materialthe organic layer was dried over Na2SO4
7. concentrationconcentrated
8. customThe residue was purified by silica gel chromatography with hexanes/acetone=8:1