反应详情

To a RT solution of 1H-imidazole-4-carboxylic acid (1.12 g, 9.99 mmol) in pyridine (15 mL) and DMF (30 mL) was added triphenylmethyl chloride (3.06 g, 11.0 mmol). The reaction mixture was stirred at RT overnight, then was partitioned between EtOAc (500 mL) and H2O (50 mL). The organic phase was washed with H2O (20 mL), 10% citric acid (20 mL) and brine (5 mL), dried (MgSO4) and concentrated in vacuo. The residue was triturated with EtOAc to afford 1-trityl-1H-imidazole-4-carboxylic acid (2.78 g, 79% yield) as a white solid. LCMS Method A (ESI, positive ion spectrum): (M+H)/z=not observed, tR=3.27 min.

1. customwas partitioned between EtOAc (500 mL) and H2O (50 mL)
2. washThe organic phase was washed with H2O (20 mL), 10% citric acid (20 mL) and brine (5 mL)
3. dry with materialdried (MgSO4)
4. concentrationconcentrated in vacuo
5. customThe residue was triturated with EtOAc