Diethyl Ether → 5-Bromo-2-[3-(2,2,2-trichloro-ethanoyl)-ureido]-thiophene-3-carboxylic Acid Amide

Participants

Reaction Steps

N-Bromosuccinimide (1.56 g, 8.8 mmol) was added to a solution of 2-[3-(2,2,2-trichloro-ethanoyl)-ureido]-thiophene-3-carboxylic acid amide (2.9 g, 8.8 mmol) in acetic acid (30 mL) and chloroform (10 mL) at room temperature. The resulting solution was stirred under nitrogen with an aliquot was taken for LC-MS every 10 min. After 30 min., the LC-MS showed no remaining starting material. Diethyl ether (80 mL) was added to the solution and the resulting precipitate was filtered and dried under vacuum to give the above titled compound as a light brown solid (3.5 g, 8.55 mmol, 97% yield).

Provenance & Evidence