Sodium Azide → HCID 86621226, compound

Participants

Reaction Steps

C-(2,5-dichloro-thiophen-3-yl)-methylamine: To 103A (250 mg, 1.016 mmol) in DMF (4 mL) was added sodium azide (661 mg, 10.16 mmol) and the reaction mixture was stirred at rt for 16 h. The reaction mixture was quenched with water and extracted with EtOAc. The organic layer was washed with water and brine, dried over Na2SO4, filtered and concentrated yielding 3-azidomethyl-2,5-dichloro-thiophene (135 mg). To a solution of this intermediate (135 mg, 0.519 mmol) in methanol (5 mL) was added 10% palladium on carbon. The reaction mixture was stirred at rt under a hydrogen balloon for 1 h. The mixture was filtered and the catalyst was washed with MeOH. The combined filtrate was concentrated and the resulting residue was dissolved in 0.25 N HCl (2 mL) and washed with EtOAc (10 mL). The aqueous layer was basified with 1N NaOH and extracted with EtOAc (5×10 mL). The combined organic layers were washed with brine, dried with Na2SO4, filtered and concentrated yielding 103B (41 mg). LCMS m/z 182.1 (M+H)+.

Provenance & Evidence