Sulfuric Acid → HCID 53861315, compound

Participants

Reaction Steps

A mixture of 3-(4-cyano-3-hexylsulfanyl-isothiazol-5-yl)-1,1-dimethyl-urea (0.09 g, 0.29 mmol) and concentrated sulfuric acid (0.18 mL) was stirred at ambient temperature for 1.5 hours. The mixture was diluted with ice water, extracted three times into ethyl acetate. The combined organic layers were dried over Na2SO4, filtered and concentrated in vacuo affording 0.076 g (78%) of 5-(3,3-dimethyl-ureido)-3-hexylsulfanyl-isothiazole-4-carboxylic acid amide as a colorless solid: 1H NMR (300 MHz, acetone-d6) δ 7.08 (bs, 2H), 3.20 (t, 2H, J=7.2 Hz), 3.02 (s, 6H), 1.63 (p, 2H, J=7.2 Hz), 1.35 (m, 2H), 1.23 (m, 4H), 0.78 (t, 3H, J=6.9 Hz) ppm; MS (APCl, m/z): 331 [M+H]+.

Provenance & Evidence