反应详情

A solution of methyl 3-[2-(2,6-dichlorophenyl)ethyl]-5-(1-methylethyl)-4-isoxazolecarboxylate (0.900 g, 2.63 mmol) in THF (7.3 mL) was stirred at 0° C. as a 1.5M solution of diisobutylaluminum hydride in toluene (3.7 mL, 5.6 mmol) was added. The solution was allowed to warm to room temperature and stir overnight. Additional diisobutylaluminum hydride in toluene (1.8 mL, 2.7 mmol) was added and the solution was allowed to stir for another 3 hours. Methanol was added followed by a saturated aqueous solution of Rochelle's salt. The solution was stirred for two hours then was partitioned between ethyl acetate and brine. The organic layer was dried with magnesium sulfate, concentrated and purified by chromatography (silica gel, 0-60% ethyl acetate in hexane) to provide the title compound (0.80 g, 51.6% as 0.25EtOAc). 1H NMR (DMSO-d6): δ 7.45 (d, J=8 Hz, 2H), 7.28 (t, J=8 Hz, 1H), 4.89 (t, J=5 Hz, 1H), 4.26 (d, J=5 Hz, 2H), 3.31-3.18 (m, 3H), 2.83-2.79 (m, 2H), 1.21 (d, J=7 Hz, 6H).

1. additionwas added
2. stirringto stir for another 3 hours
3. stirringThe solution was stirred for two hours
4. customthen was partitioned between ethyl acetate and brine
5. dry with materialThe organic layer was dried with magnesium sulfate
6. concentrationconcentrated
7. custompurified by chromatography (silica gel, 0-60% ethyl acetate in hexane)