Dichloromethane → Didodecyl 2-(thiophen-3-yl)malonate

Beteiligte Stoffe

Reaktionsschritte

In a one-necked flask, 3-thienylmalonic acid (10.0 g, 53.7 mmol) and 1-dodecanol (4 eq., 40.0 g, 215 mmol) were dissolved in THF (80 mL) at room temperature. To this solution was added methanesulphonic acid (1.99 g, 20.7 mmol). The reaction mixture was stirred at room temperature for 3 days. The solvent was then evaporated at 40° C. The residue was re-dissolved in CH2Cl2 to form a solution, which was loaded onto a column (eluent: CH2Cl2) to give didodecyl 2-(thiophen-3-yl)malonate (yield: 18.0 g, 69%). 1H NMR (CDCl3): 0.9 (6H, t), 1.3 (36H, m), 1.7 (4H, m), 4.2 (4H, t), 4.8 (1H, s), 7.2 (1H, d), 7.3 (1H, d), 7.4 (1H, s).

Herkunft & Nachweise