Hydrochloric Acid → HCID 68517394, compound

Participants

Reaction Conditions

Reaction Steps

Dissolve the product of Example 33 in ethyl acetate (10 mL) and diethyl ether (5 mL). Add 2M HCl in diethyl ether (0.5 mL, 1.0 mmol). Concentrate the slurry and dry in vacuo. Dilute the residue in dichloromethane (5.0 mL) and blanket with nitrogen. Cool the solution to 0° C. with external ice bath. Add BBr3 (0.1 mL, 1.1 mmol) and stir for 1 hour. Quench with water (1.0 mL) and dilute with dichloromethane (10 mL). Separate the layers, wash the organic layer with saturated aqueous NaHCO3 (10 mL) and brine (10 mL). Dry with MgSO4, filter, and concentrate in vacuo. Chromatograph the residue on a SiO2 column eluting the 6-(2,3-dichloro-4-methanesulfonyl-phenyl)-5-[4-(2-piperidin-1-yl-ethoxy)-phenoxy]-naphthalen-2-ol with a step gradient of methanol/dichloromethane (0 to 5%). Dissolve the free base in diethyl ether (5.0 mL), ethyl acetate (6.0 mL) and methanol (1.0 mL) and add 2M HCl in diethyl ether (0.5 mL, 1.0 mmol). Collect the precipitate on filter paper, rinse with diethyl ether to give 38 mg of the title compound (30%): mass spectrum (ion spray): m/z=586.2.

Provenance & Evidence