Benzylamine → 2-amino-N-benzyl-6-methoxybenzamide

Beteiligte Stoffe

Reaktionsschritte

To a solution of 2-amino-6-methoxybenzoic acid (0.841 g, 5.0 mmol, 1.0 equiv), benzylamine (0.643 g, 6.0 mmol, 1.2 equiv), and diisopropylethylamine (1.935 g, 15.0 mmol, 3.0 equiv) in 50 mL of dichloromethane was added 2-chloro-1,3-dimethylimidazolinium chloride (1.099 g, 6.5 mmol, 1.3 equiv) at room temperature. The mixture was stirred at room temperature for 6 hours, poured into water, and extracted with dichloromethane. The organic solution was successively washed with aqueous saturated NaHCO3 and water. The organic layer was dried over MgSO4 and the solvent was removed by rotary evaporator. The residue was purified by column chromatography (silica gel, 2% 2.0 M ammonia MeOH solution in CH2Cl2) to give 2-Amino-N-benzyl-6-methoxybenzamide (0.593 g, 46%) as a solid. 1H NMR (400 MHz, CHLOROFORM-d) δ 3.81 (s, 3H), 4.62 (s, 1H), 4.63 (s, 1H), 6.07 (vb.s., 2H), 6.19 (d, J=8.2 Hz, 1H), 6.32 (d, J=8.2 Hz, 1H), 7.07 (t, J=8.2 Hz, 1H), 7.14-7.54 (m, 5H), 8.05 (br. s., 1H); HPLC: tR=4.72 min, UV254=99%; HRMS (ESI): m/z calcd for C15H16N2O2 [M+1]+257.1296. Found 257.1294.

Herkunft & Nachweise