Hydroxyamine hydrochloride → HCID 57827570, compound

Participants

Reaction Steps

Potassium carbonate (5.14 g) and methyl iodide (4.90 mL) were added to a mixed solution of 2-((R)-2-allyloxy-3-benzyloxy-propyl)-[1,3]dithiane (12 g) in acetonitrile (27 mL) and water (4.5 mL), and then the mixture was stirred at 40° C. After four hours, water (3 mL) and methyl iodide (2 mL) were added to the reaction solution. After further three hours, methyl iodide (1 mL) was added to the reaction solution. After stirring for eight hours in total, water and t-butyl methyl ether were added to the reaction solution, and the organic layer was separated. The organic layer was washed with brine. The organic layer was dried over anhydrous magnesium sulfate. The drying agent was removed by filtration and the filtrate was concentrated under reduced pressure to obtain crude (R)-3-allyloxy-4-benzyloxy-butyraldehyde (about 10 g). The crude product was used for the next reaction without further purification. Hydroxylamine hydrochloride (4.29 g) and sodium acetate (4.92 g) were sequentially added to a solution of ethanol (60 mL) and water (15 mL). The above aldehyde (10 g) was added to the mixture, followed by stirring for 20 hours. A saturated sodium bicarbonate solution and ethyl acetate were added to the reaction solution, and the organic layer was separated. The organic layer was sequentially washed with a saturated sodium bicarbonate solution and brine and dried over anhydrous magnesium sulfate. The drying agent was removed by filtration and then the filtrate was concentrated under reduced pressure to obtain a residue. The residue was subjected to silica gel column chromatography to obtain the title compound (5.74 g).

Provenance & Evidence