8-Quinolinecarboxaldehyde → quinolin-8-yl(1-trityl-1H-imidazol-5-yl)methanol

Participants

Reaction Steps

A solution of 4-iodo-1-tritylimidazole (commercially available) 5.2 g, 11.94 mmol) in dichloromethane (80 mL) at −10° C. was treated with ethyl magnesium bromide (3.98 mL, 11.94 mmol, 3M in ether) and allowed to react for 45 m. A solution of quinoline-8-carbaldehyde, (Intermediate 11) (1.5 g, 9.55 mmol) in dichloromethane was added via syringe at −10° C. and stirred for 16 h at room temperature. The mixture was quenched with water (50 mL) and a sat. solution of ammonium chloride (50 mL) and subjected to an aqueous work-up. The residue was purified by chromatography on silica gel with 3% NH3-MeOH: CH2Cl2 to give to give quinolin-8-yl(1-trityl-1H-imidazol-5-yl)methanol, (Intermediate 12) as a solid, (3.7 g 82.7%).

Provenance & Evidence