反应详情

Prepared using General Procedure 6: To a stirred solution of 4-((tert-butoxycarbonyl)amino)benzoic acid (2.0 g, 8.43 mmol), tert-butyl 2-((4-bromobenzyl)amino)acetate INT-60 (2.53 g, 8.43 mmol) and TEA (1.76 mL, 12.6 mmol) in DMF (15 mL) was added HATU (3.53 g, 9.27 mmol) at room temperature. After stirring at room temperature for 2 h the reaction mixture was diluted with EA (150 mL) and washed with brine (200 mL). The organics were concentrated in vacuo and the residue was purified by chromatography (EA/hexanes) to afford 3.97 g (91%) of tert-butyl 2-(N-(4-bromobenzyl)-4-((tert-butoxycarbonyl)amino)benzamido)acetate INT-61 as a viscous oil. LCMS-ESI (m/z) calculated for C25H31BrN2O5: 519; found: 517/519 [M−H]−, tR=2.68 min (Method 10).

1. customPrepared
2. washwashed with brine (200 mL)
3. concentrationThe organics were concentrated in vacuo
4. customthe residue was purified by chromatography (EA/hexanes)