HCID 10830922, compound → HCID 69921283, compound

Participants

Reaction Steps

1.20 g (18.4 mmol) of Zn granules are washed with 2×3 ml of 2 N HCl, then immediately added to 90 mg (0.33 mmol) of HgCl2 in 1.5 ml of H2O and 1.5 ml of conc. HCl and the mixture is shaken at room temp. for 10 min. The aq. phase is decanted and the zinc amalgam is additionally washed with 2×3 ml of dil. HCl before it is added to a solution of 60.0 mg (0.18 mmol) of 1,2,3,8,9,10-hexahydroindolo[3′,2′:5,6]pyrrolo-[3′,4′:3,4]cyclohepta[b]indole-1,3-dione in 1.5 ml of 5 N HCl, 1.5 ml of EtOH and 1.5 ml of toluene and heated under reflux. After 1 h, as soon as the reaction solution has cooled to room temp. H2O is added and the mixture is extracted with 2×10 ml of CH2Cl2. The org. extracts are dried over Na2SO4, concentrated in vacuo and purified by column chromatography (SiO2; CH2Cl2/ethyl acetate/MeOH 8:2:0.5): colourless wax, yield 14 mg (23%).

Provenance & Evidence