反应详情

(a-2) To a stirred solution of 47.8 parts of ethyl N-(4-formyl-2-nitrophenyl)glycine in 280 parts of ethanol were added in small portions 3.8 parts of sodium tetrahydroborate. The whole was stirred for 30 minutes at room temperature. The reaction mixture was decomposed by a solution of 12 parts of acetic acid in 50 parts of water. The mixture was concentrated. The product was extracted with dichloromethane. The extract was dried, filtered and evaporated. The residue was crystallized from 2-propanol. The product was filtered off and dried, yielding 34.1 parts (70.6%) of ethyl N-[4-(hydroxymethyl)-2-nitrophenyl]glycine (int. 30).

1. concentrationThe mixture was concentrated
2. extractionThe product was extracted with dichloromethane
3. customThe extract was dried
4. filtrationfiltered
5. customevaporated
6. customThe residue was crystallized from 2-propanol
7. filtrationThe product was filtered off
8. customdried