Hydrochloric Acid → HCID 44632857, compound

Participants

Reaction Steps

To a cooled (0° C.) suspension of ethyl 2-hydrazinyl-4-methylthiazole-5-carboxylate (3.00 g, 14.92 mmol) in a mixture of diethyl ether (15 mL) and water (15 mL) was added hydrochloric acid (2.72 mL) dropwise. The reaction mixture was stirred for 10 minutes, and a solution of sodium nitrite (1.21 g, 17.46 mmol) in water (2 mL) was added. The mixture was stirred for 2 hours at 0° C. and extracted with diethyl ether. The organic layer was separated, washed with brine, dried over anhydrous sodium sulphate, filtered and concentrated in vacuo. The residue was purified by column chromatography (ethyl acetate:hexanes, 1:4) to afford the title compound as a yellowish solid (1.49 g, 47%): 1H NMR (300 MHz, CDCl3) δ 4.29 (q, J=6.0 Hz, 2H), 2.62 (s, 3H), 1.33 (t, J=6.0 Hz, 3H); MS (ES+) m/z 213.2 (M+1).

Provenance & Evidence