Ethanol → Ethyl 2-chloropyrimidine-4-carboxylate

関与物質

反応手順

The reaction mixture of 2-chloropyrimidine-4-carboxylic acid, 9.A (avialable from Anichem LLC, 1.00 g, 6.3 mmol), 1,3-dicyclohexylcarbodiimide (1.4 g, 6.9 mmol) and ethanol (0.32 g, 6.9 mmol) in DCM (10 ml) was stirred at room temperature overnight. The solid was filtrated off. DCM (80 ml) was added and washed with brine (30 ml) and dried over MgSO4. The solvent was evaporated. The crude product was purified by Cobi-Flash silica gel column to give 9.B. 0.74 g, yield, 63%. 1H NMR (400 MHz, chloroform-d) δ ppm 8.87 (1H, d, J=4.7 Hz), 7.95 (1H, d, J=4.7 Hz), 4.51 (2H, q, J=7.4 Hz), 1.45 (3H, t, J=7.0 Hz). MS ESI (pos.) m/e: 187.0 (M+H)+.

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