methyl (S)-lactate → methyl (S)-2-(methoxymethoxy)propionate

Methyl L-lactate (208 mg, 2 mmol) was dissolved in benzotrifluoride (2.0 mL), pyridinium p-toluenesulfonate (PPTS, 50 mg, 0.2 mmol) was added and then 2-(chloromethyl)-3,5-dioxahexa-1-ene (manufactured by Tokyo Kasei Kogyo Co., Ltd., 327 mg, 2.4 mmol) was added, and the mixture was stirred at room temperature for 24 hrs. Saturated aqueous sodium hydrogencarbonate solution (3 mL) was added to the reaction mixture, and the mixture was extracted with ethyl acetate (4 mL). The organic layer was washed with saturated aqueous sodium hydrogencarbonate solution (2 mL) and dried over anhydrous magnesium sulfate (0.5 g), and the solvent was evaporated under reduced pressure to give methyl (S)-2-(methoxymethoxy)propionate (248 mg, yield 84%).

1. extractionthe mixture was extracted with ethyl acetate (4 mL)
2. washThe organic layer was washed with saturated aqueous sodium hydrogencarbonate solution (2 mL)
3. dry with materialdried over anhydrous magnesium sulfate (0.5 g)
4. customthe solvent was evaporated under reduced pressure

ORD-Eintrag

ord-5d5db703235044468071285d6242b432

Quelldatensatz

uspto-grants-2009_10

DOI

10.6084/m9.figshare.5104873.v1

Patentnummer

US07605286B2