Sodium Iodide → 6-bromo-4-{5-[(8aS)-hexahydropyrrolo[1,2-a]pyrazin-2(1H)-ylmethyl]-1,3,4-oxadiazol-2-yl}-1-(phenylsulfonyl)-1H-indazole

Participants

Reaction Conditions

Reaction Steps

6-Bromo-4-[5-(chloromethyl)-1,3,4-oxadiazol-2-yl]-1-(phenylsulfonyl)-1H-indazole (300 mg, 0.661 mmol) and sodium iodide (99 mg, 0.661 mmol) were weighed into a round-bottomed flask and dissolved in acetonitrile (2 ml) before (S)-1,4-diazabicyclo[4.3.0]nonane (167 mg, 1.322 mmol, available from ABCR GmbH & CO.KG) and DIPEA (0.231 ml, 1.322 mmol) were added. The mixture was heated to 70° C. for 2 h. The mixture was cooled, diluted with DCM and washed with 2 M aqueous HCl (2 ml). The organic layer was separated by hydrophobic frit. The aqueous extracts were combined and neutralised to pH 7 with NaOH then extracted with more DCM (2×10 ml) which was combined with the other organic extracts and evaporated under a stream of nitrogen to give an orange oil. This was dissolved in DCM and loaded onto the top of a 10 g silica cartridge that was subsequently eluted with 0-15% MeOH(+1% triethylamine)/DCM over 15 mins. The appropriate fractions were combined and the solvent removed in vacuo to give the title compound as a cream solid (220 mg).

Provenance & Evidence