Oxalyl chloride → 2-Methylcyclohexanecarbonyl chloride

関与物質

反応手順

To a solution of 2-methylcyclohexanecarboxylic acid (6.00 mL, 42.6 mmol, mixture of cis and trans) in DCM (60 mL) was added oxalyl chloride (4.80 mL, 55.3 mmol) followed by DMF (0.03 mL, 0.4 mmol). The reaction mixture was stirred at ambient temperature for about 4 h before it was concentrated under reduced pressure to constant weight to afford 2-methylcyclohexanecarbonyl chloride (mixture of diastereomers) as a yellow oil (7.0 g, 97%): 1H NMR (400 MHz, CDCl3) δ 2.98-2.94 (m, 1H), 2.39-2.35 (m, 1H), 1.91-1.82 (m, 1H), 1.79-1.72 (m, 1H), 1.69-1.60 (m, 2H), 1.57-1.47 (m, 2H), 1.42-1.36 (m, 1H), 1.34-1.26 (m, 1H), 1.04-0.96 (m, 3H).

情報源と証拠