Acetic Acid → HCID 63386443, compound

Participants

Reaction Conditions

Reaction Steps

To a mixture of 5-pyridin-3-yl-[1,3,4]thiadiazol-2-ylamine (5.5 g, 30.9 mmol) and copper powder (0.335 g, 5.27 mmol), in a mixture of glacial acetic acid (93 mL) and concentrated hydrochloric acid (19 mL) at 0° C., was added dropwise a solution of sodium nitrite (10.67 g, 154.6 mmol) dissolved in water (13 mL). The reaction mixture was then allowed to warm to 23° C. overnight. The reaction mixture was diluted with 300 g of ice, resulting in an emulsion, and extracted with dichloromethane (3×200 mL). The emulsion was then passed through a medium porosity scintered glass funnel containing celite. The cake was stirred and washed well with chloroform. The filtrate was combined with the organic extracts. The organic phase was dried over MgSO4 and concentrated to dryness to give the title compound as a yellow solid (4.42 g, 72%): 1H NMR (300 MHz, CDCl3) δ 9.08 (br s, 1H), 8.78 (br s, 1H), 8.29 (dt, J=8, 2 Hz, 1H), 7.49 (dd, J=8, 5 Hz, 1H).

Provenance & Evidence