Imidazole → HCID 86588759, compound

Participants

Reaction Conditions

Reaction Steps

To a solution of intermediate 60 (1.5 g, 3.85 mmol) in dimethylformamide (5 mL) was added imidazole (0.917 g, 13.5 mmol) and tert-butyldimethylsilyl chloride (0.870 g, 5.77 mmol). The reaction mixture was stirred at 35° C. for 20 h, and then ethyl acetate (100 mL) was added. The resulting organic phase was washed with water (4×20 mL) and brine (1×) and then dried (Na2SO4). After concentrating on a rotary evaporator the resulting residue was purified by column chromatography (silica gel, 1:1 hexanes/ethyl acetate-3:7 hexanes/ethyl acetate) to afford intermediate 61 as a white solid (1.6 g, 83%). ESI-MS m/e 504.0 (M+1).

Provenance & Evidence