Hydrochloric Acid → HCID 56644526, Verbindung

Beteiligte Stoffe

Reaktionsbedingungen

Reaktionsschritte

To a solution of 1-naphthylmethanol (19.8 mg, 0.13 mmol) in anhydrous tetrahydrofuran were added potassium tert butoxide (0.14 mL, 1 M solution in anhydrous tetrahydrofuran 0.14 mmol) followed by a solution of methyl 3-cyano-4-fluorobenzoate (22.4 mg, 0.13 mmol) in dimethylsulfoxide (0.1 mL). The reaction mixture was shaken at 80° C. for 16 hours, evaporated in vacuo, and water (1 mL) was added. The mixture was extracted with ethyl acetate (3×1 mL) and the combined organic extracts were dried over anhydrous sodium sulphate, filtered and evaporated in vacuo. The residue was dissolved in tetrahydrofuran (0.7 mL), an aqueous solution of lithium hydroxide (0.7 mL, 1 M, 0.70 mmol) added and the mixture was shaken at 60° C. for 2 hours. The reaction mixture was evaporated in vacuo and hydrochloric acid (0.70 mL, 1 M, 0.70 mmol) was added. The resulting mixture was extracted with ethyl acetate (3×1 mL) and the combined organic extracts were dried over anhydrous sodium sulphate, filtered and evaporated in vacuo. To the residue were added methanesulfonamide (27 mg, 0.28 mmol), a solution of 4-dimethylaminopyridine (24.4 mg, 0.20 mmol) and 1-(3-dimethylaminopropyl)-3-ethylcarbodiimide hydrochloride (38.3 mg, 0.20 mmol) in dichloromethane (1 mL). The mixture was shaken for 16 hours at 30° C. and then evaporated in vacuo. The residue was purified on an HPLC column (Grace Vydac C18 200*20 mm*5 mm column) with a gradient of acetonitrile/water (0.1% trifluoroacetic acid) to yield the title compound (4.25 mg, 9%).

Herkunft & Nachweise