Propyl chloroformate → (4-Bromo-2,6-dimethyl-phenyl)-carbamic acid propyl ester

関与物質

反応手順

4-Bromo-2,6-dimethyl-aniline (4.3 g) and propyl chloroformate (2.70 mL) were mixed in acetonitrile (50 mL) and tetrahydrofuran (20 mL) and the reaction mixture was heated to reflux for 1 hour. Potassium carbonate (4.5 g) was added and the reaction mixture was refluxed for 1 hour and then poured onto crushed ice and saturated aqueous potassium carbonate (50 mL). The product was collected by filtration and washed with water (100 mL) to furnish 5.26 g (86% yield) of the title compound as a solid. LC-MS (m/z) 287 (MH+); tR=3.18, (UV, ELSD) 99%, 95%. 1H NMR (500 MHz, CDCl3): 0.93 (t, 3H), 1.62 (m, 2H), 2.15 (s, 6H), 4.00 (t, 2H), 7.28 (s, 2H), 8.74 (b, 1H).

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