Sodium Hydroxide → 1-[(1-Benzofuran-2-carbonyl)amino]cyclohexane-1-carboxylic acid

Beteiligte Stoffe

Reaktionsschritte

To the solution of methyl 1-[N-(benzofuran-2-ylcarbonyl)amino]-1-cyclohexanecarboxylate (105.0 g) in 450 ml of methanol, was added 2N-sodium hydroxide solution (170 ml, 0.34 mol). The reaction mixture was refluxed for 23 hours and concentrated to obtain a residue, which was diluted with 400 ml of water and washed with 300 ml of diethyl ether. 6N-hydrochloride was added dropwise to the resulting aqueous layer to adjust the pH of the solution to pH 3. The resulting white solid was filtered and dried to give the titled compound (49.5 g).

Herkunft & Nachweise