methyl (2S)-2-amino-3-[tert-butyl(dimethyl)silyl]oxypropanoate

Conditions: temp:0.00; pressure:0.00; stir:; See reaction.notes.procedure_details.

Procedure: L-Serine methyl ester hydrochloride (7.09 g) was suspended in dichloromethane (100 mL), and to the suspension 4-(dimethylamino)pyridine (700 mg) and triethylamine (9.69 g) were added, and tert-butyldimethylchlorosilane (7.0 g) were added portionwise at 0° C. to the mixture to conduct stirring at room temperature. The reaction mixture was washed with water and saturated brine, dried over anhydrous sodium sulfate and concentrated under reduced pressure. The residue was purified by column chromatography on silica gel (chloroform:methanol=20:1) to obtain the title compound. The reaction mixture was washed with water and saturated brine dried over anhydrous sodium sulfate concentrated under reduced pressure The residue was purified by column chromatography on silica gel (chloroform:methanol=20:1)

Conditions: temp:0.00; pressure:0.00; stir:; See reaction.notes.procedure_details.

Procedure: L-Serine methyl ester hydrochloride (7.09 g) was suspended in dichloromethane (100 mL), and to the suspension 4-(dimethylamino)pyridine (700 mg) and triethylamine (9.69 g) were added, and tert-butyldimethylchlorosilane (7.0 g) were added portionwise at 0° C. to the mixture to conduct stirring at room temperature. The reaction mixture was washed with water and saturated brine, dried over anhydrous sodium sulfate and concentrated under reduced pressure. The residue was purified by column chromatography on silica gel (chloroform:methanol=20:1) to obtain the title compound. The reaction mixture was washed with water and saturated brine dried over anhydrous sodium sulfate concentrated under reduced pressure The residue was purified by column chromatography on silica gel (chloroform:methanol=20:1)