Hydrogen Bromide → HCID 24775392, compound

Participants

Reaction Conditions

Reaction Steps

To 4-(1,4-Diazepan-1-ylmethyl)-6-methoxy-1-(phenylsulfonyl)-1H-indole (0.12 g, 0.03 mmol; Example 58) was 33% HBr in acetic acid (2 mL) added and the mixture was refluxed in STEM-block at 125° C. for 20 h which gave 70% conversion to product. Additional HBr in acetic acid (1 mL) was added and the mixture was refluxed for additional 20 h which gave 90% conversion product. Additional HBr in acetic acid (1 mL) was added and the mixture was refluxed for additional 21 h. The mixture was cooled to rt and sat. NaHCO3-solution was added (foaming) until neutral pH. The mixture was extracted with 3*EtOAc/ethanol (10:1). The organic layers were dried (Na2SO4), filtrated and the solvent was evaporated yielding 9.5 mg (82%) of a brownish-red solid. MS (ESI+) for C20H23N3O3S m/z 386 (M+H)+.

Provenance & Evidence