反应详情

To a solution of methyl 4-(4-chlorophenyl)-2-(2-methylimidazol-1-yl)-5-oxazolepropionate (716.6 g) in toluene (7166 ml) was added dropwise sodium bis(2-methoxyethoxy)aluminum hydride (70% toluene solution, 957.6 g) at not higher than 5° C. over 4 h. To the reaction mixture was added dropwise 10% aqueous Rochelle salt solution (7166 ml) at not higher than 10° C. and the precipitated crystals were collected by filtration. The obtained crystals were washed with 10% Rochelle salt and water, and dried under reduced pressure. The residue was suspended in a mixture of ethyl acetate (717 mL) and isopropyl ether (2866 mL) and the suspension was stirred at room temperature for 3 h. The obtained crystals were collected by filtration to give the title compound (509 g, yield: 77.3%).

1. filtrationthe precipitated crystals were collected by filtration
2. washThe obtained crystals were washed with 10% Rochelle salt and water
3. customdried under reduced pressure
4. additionThe residue was suspended in a mixture of ethyl acetate (717 mL) and isopropyl ether (2866 mL)
5. filtrationThe obtained crystals were collected by filtration