1,8-Diazabicyclo(5.4.0)undec-7-ene → HCID 9947705, compound

Participants

Reaction Steps

Into a solution of 5-iodo-1H-indole-2,3-dione (1.0 g, 3.66 mmol) in anhydrous THF (18 ml) were added DBU (0.82 mL, 5.49 mmol) and methyl 4-bromobutanoate (0.6 mL, 5.49 mmol). After stirring at rt for 2 hrs, the reaction mixture was quenched with water (60 mL) and HCl (IN, 10 mL). Extraction with EtOAc (3×50 mL), drying over MgSO4 and evaporation under vacuo gave a residue. Purification by flash chromatography (chexanes/Et2O (1/3)) gave the title compound as an orange powder (1.10 g, 71%) in 90.1% purity by HPLC (MaxPlot detection between 230 and 400 nm).

Provenance & Evidence