Methanamine, N-methoxy-, hydrochloride (1:1) → 4,4,N-Trimethoxy-N-methylbutyramide

温度

-10 °C

To a solution of methyl 4,4-dimethoxy-butyrate (4.99 g, 30.8 mmol) and N,O-dimethylhydroxylamine HCl (4.65 g, 47.68 mmol) in 60 mL of THF at −20° C., is added isopropylmagnesiumchloride (46 mL, 92.28 mmol, 2.0M in THF) maintaining the temperature below −20° C. After stirring at −10° C. for 30 min, the reaction mixture is quenched with 50 mL of water and extracted with 3×80 mL of EtOAc. The combined organic layers is dried over Na2SO4 and filtered through a short silica gel pluge. The solution is concentrated to give 4,4,N-Trimethoxy-N-methyl-butyramide (5.9 g, 99%) as pale liquid. M/Z=191.0

1. temperaturemaintaining the temperature below −20° C
2. customthe reaction mixture is quenched with 50 mL of water
3. extractionextracted with 3×80 mL of EtOAc
4. dry with materialThe combined organic layers is dried over Na2SO4
5. filtrationfiltered through a short silica gel pluge
6. concentrationThe solution is concentrated

ORDレコード

ord-8d8d11905634430f88025f1c87d402c0

出典データセット

uspto-grants-2012_12

DOI

10.6084/m9.figshare.5104873.v1

特許番号

US08338440B2