Iodine → Trifluoroacetic acid

Participants

Reaction Conditions

Reaction Steps

Iodine (105 mg, 0.412 mmol) and H3PO2 (0.225 mL of a 50% aqueous solution, 2.059 mmol) were added to a solution of (rac)-1-(6-chloro-imidazo[1,2-b]pyridazin-3-yl)-2,2,2-trifluoro-1-(quinolin-6-yl)ethanol (Stage 274.1, 52 mg, 0.137 mmol) in acetic acid (1.4 mL). The RM was heated at 150° C. for 45 min under microwave irradiations. The solvent was removed. The residue was taken up with EtOAc and extracted with 1N HCl twice. The combined aqueous layers was basified to pH 14 with NaOH pellets. It was then extracted with EtOAc/MeOH (9:1) twice. Combined organic layers was dried over Na2SO4, filtered and concentrated. After purification by preparative HPLC with acetonitrile and water (+0.1% TFA), the fraction containing the product was lyophilized to give a TFA salt of the title compound (tR 1.0 min (conditions 1), MH+=363).

Provenance & Evidence