反应详情

To a stirred suspension of (1-trityl-1H-imidazol-4-ylmethyl)-phosphonic acid diethyl ester (921 mg; CAS 473659-21-1) at r.t. in THF (20 ml) under an argon atmosphere was added potassium tert-butylate (241 mg). The mixture was then stirred at r.t. for 15 minutes, and isobutyrophenone (0.25 ml) was added in one portion. The mixture (clear brown orange solution) was heated to 80° C. for 21 hours. The reaction mixture was filtered and the cake was washed with EtOAc. The filtrate was concentrated. The crude product was purified by column chromatography (silica gel; gradient: cyclohexane→cyclohexane/EtOAc 1:1) to give 4-(3-methyl-2-phenyl-but-1-enyl)-1-trityl-1H-imidazole (91 mg; not completely pure) as orange sticky solid. MS (ISP): 243.2 ([Trt]+)

1. temperatureThe mixture (clear brown orange solution) was heated to 80° C. for 21 hours
2. filtrationThe reaction mixture was filtered
3. washthe cake was washed with EtOAc
4. concentrationThe filtrate was concentrated
5. customThe crude product was purified by column chromatography (silica gel; gradient: cyclohexane→cyclohexane/EtOAc 1:1)