Methylamine → HCID 117748918, compound

Participants

Reaction Steps

Prepared using General Procedures 7: To (R)-3-((((9H-fluoren-9-yl)methoxy)carbonyl)amino)-4-(tert-butoxy)-4-oxobutanoic acid (205.7 mg, 0.5 mmol) in DMF (5 mL) at 0° C. was added HATU (380 mg, 1.0 mmol). After stirring for 3 min, DIEA (277 μL, 1.5 mmol) and methylamine (40 wt % in water, 116 μL, 1.5 mmol) were added. The reaction mixture was stirred at room temperature for 1 h. The reaction mixture was added to water (75 mL) and the precipitate was filtered and dried to give 201 mg (95%) of tert-butyl N2-(((9H-fluoren-9-yl)methoxy)carbonyl)-N4-methyl-D-asparaginate as a colorless semi-solid. LCMS-ESI (m/z) calculated for C24H28N2O5: 424.2. found 425.2 [M+H]+, tR=3.22 min (Method 16).

Provenance & Evidence