反应详情

To a slurry of 3-iodo-4-nitro-1H-indazole (1.0 g, 3.46 mmol) and methyl 3-(bromomethyl)benzoate (1.59 g, 6.92 mmol) and CH3CN (12 mL) was added 2-tert-butyl-1,1,3,3-tetramethylguanidine (0.697 mL, 3.46 mmol) dropwise and the mixture was allowed to stir overnight at ambient temperature. The mixture was concentrated and diluted with saturated aqueous NH4Cl (40 mL) and EtOAc (70 mL). The layers were mixed and separated and the aqueous phase was extracted with EtOAc (25 mL). The combined organic extracts were washed with brine, dried over Na2SO4, filtered and concentrated. The crude product was purified by column chromatography (50% EtOAc/hexane) to provide 1.04 g (68%) of the product as a yellow/orange solid.

1. concentrationThe mixture was concentrated
2. additiondiluted with saturated aqueous NH4Cl (40 mL) and EtOAc (70 mL)
3. additionThe layers were mixed
4. customseparated
5. extractionthe aqueous phase was extracted with EtOAc (25 mL)
6. washThe combined organic extracts were washed with brine
7. dry with materialdried over Na2SO4
8. filtrationfiltered
9. concentrationconcentrated
10. customThe crude product was purified by column chromatography (50% EtOAc/hexane)