HCID 86642127, compound → HCID 66636723, compound

Participants

Reaction Steps

To a solution of (±)-diethyl 2,2′-(3-methyl-4-nitro-2-thioxo-2,3-dihydro-1H-indole-1,3-diyl)diacetate from Step C (900 mg, 6.31 mmol) in THF (40 mL) was added activated Raney nickel (ca. 4 g) and the reaction mixture was stirred at ambient temperature for 10 min. The reaction mixture was filtered through a pad of Celite, washing with THF. EtOAc (100 mL) was added to the filtrate and the mixture was concentrated under reduced pressure to a volume of about 100 mL. This mixture was diluted with EtOAc (300 mL) and washed with saturated aqueous NaHCO3 (100 mL), brine (100 mL), then dried over Na2SO4, filtered, and concentrated in vacuo. The crude product was purified by silica gel chromatography, eluting with a gradient of hexane:EtOAc—100:0 to 50:50, to give the title compound. MS: m/z=321 (M+1).

Provenance & Evidence