反应详情

To a solution of (2S,4R)-1-tert-butyl 2-ethyl 4-allyl-5-oxopyrrolidine-1,2-dicarboxylate (30 g, 0.1 mol) in MeOH/H2O (700/70 mL) was added NaBH4 (25 g, 0.66 mol), the result mixture was stirred 1 hr at rt and quenched with sat. aq. NH4Cl (300 mL). The organic solvent was removed under vacuum and extracted with EtOAc (3×250 mL). The combined organic phases were washed with brine (250 mL) and dried over anhydrous Na2SO4, filtered and evaporated to afford crude tert-butyl (2S,4R)-1-hydroxy-4-(hydroxymethyl)hept-6-en-2-ylcarbamate (22 g, 85%). It was used in the next step without further purification.

1. customquenched with sat. aq. NH4Cl (300 mL)
2. customThe organic solvent was removed under vacuum
3. extractionextracted with EtOAc (3×250 mL)
4. washThe combined organic phases were washed with brine (250 mL)
5. dry with materialdried over anhydrous Na2SO4
6. filtrationfiltered
7. customevaporated