Triethylamine → HCID 68809854, compound

Participants

Reaction Conditions

Reaction Steps

To a stirred mixture of compound from Step B (0.42 g, 1.68 mmol) and triethylamine (0.64 mL, 4.6 mmol) in dioxane was added 1-bromo-3,3,3-trifluoroacetone. The resultant mixture was heated at 50° C. overnight. After solvent was removed, the residue was dissolved in isopropanol and refluxed overnight. After an aqueous work-up, the residue purified by flash chromatography (silica gel, 4% of 10% methanolic ammonium hydroxide solution in dichloromethane). The intermediate was dissolved in acidic (three drops of concentration hydrochloric acid) methoxyethanol (8 mL) and heated at 120° C. overnight. After solvent was removed, the residue was treated with 4 N hydrogen chloride in dioxane for 3 h. Purification by flash chromatography (silica gel, eluting with 6% of 10% methanolic ammonium hydroxide in dichloromethane) gave the title compound.

Provenance & Evidence