反应详情

Prepared using General Procedure 7: To a stirred solution of tert-butyl 2-((4-cyanobenzyl)amino)acetate (14.7 g, 47.7 mmol) INT-31 in DCM (150 mL) stirring in a 0° C. in an ice bath was added TEA (9.98 mL, 71.6 mmol) followed by 4-nitrobenzoyl chloride. The reaction mixture was allowed to warm to room temperature over 1.5 h. The reaction mixture was diluted with DCM (300 mL) and washed with NaHCO3 (2×200 mL). The organics were dried over dried over MgSO4 and concentrated in vacuo. The crude product was purified by chromatography (MeOH/DCM) followed by evaporation from hexanes to provide 11.5 g (61%) tert-butyl 2-(N-(4-cyanobenzyl)-4-nitrobenzamido)acetate INT-56 as a white powder. LCMS-ESI (m/z) calculated for C21H21N3O5: 395; found 394 [M−H]−, tR=2.33 min broad (Method 10).

1. customPrepared
2. washwashed with NaHCO3 (2×200 mL)
3. customThe organics were dried
4. dry with materialover dried over MgSO4
5. concentrationconcentrated in vacuo
6. customThe crude product was purified by chromatography (MeOH/DCM)
7. customfollowed by evaporation from hexanes