4-Methylphenyl isocyanate → HCID 9858766, compound

Participants

Reaction Steps

A solution of 2-amino-5-tert-butylthiophene-3-carboxamide (0.14 g, 0.7 mmol) and p-tolyl isocyanate (0.093 g, 0.7 mmol) in toluene (5 mL) was stirred at 60° C. overnight. The reaction mixture was separated between with water (10 mL) and EtOAc (10 mL). The aqueous phase was back-extracted with EtOAc (3×10 mL), and the combined organic phases were washed with a saturated NaCl solution (25 mL), dried (Na2SO4), and concentrated under reduced pressure. The residue was purified by chromatography (SiO2; gradient from 20% EtOAc/80% pet. ether to 30% EtOAc/70% pet ether) to give N-(3-carbamoyl-5-tert-butyl-2-thienyl)-N′-(4-methylphenyl)urea (0.092 g, 40%): 1H-NMR (CDCl3) δ1.38 (s, 9H), 2.32 (s, 3H), 5.58 (br s, 2H), 6.53 (s, 1H), 7.13 (app d, 2H), 7.35 (app d, 2H), 7.45 (br, 1H), 11.23 (br s, 1H).

Provenance & Evidence