反应详情

To a solution of methyl 2-tert-butyl-5-nitro-1H-indole-7-carboxylate (6.15 g, 22.3 mmol) and dichloromethane (30 ml) was added DIBAL-H (1.0 M, 20 mL, 20 mmol) at 78° C. The mixture was stirred for 1 h before water (10 mL) was added slowly. The resulting mixture was extracted with EtOAc (120 mL×3). The combined organic extracts were dried over anhydrous Na2SO4 and evaporated under vacuum to give (2-tert-butyl-5-nitro-1H-indol-7-yl)methanol (4.0 g, 73%), which was used in the next step directly.

1. additionwas added slowly
2. extractionThe resulting mixture was extracted with EtOAc (120 mL×3)
3. dry with materialThe combined organic extracts were dried over anhydrous Na2SO4
4. customevaporated under vacuum