Butyl isocyanate → HCID 13937615, compound

Participants

Reaction Steps

A mixture of 7.7 g of the product from Example 4, 3.5 g of n-butyl isocyanate, and 4.8 g anhydrous potassium carbonate in 100 ml of methyl ethyl ketone was stirred at reflux temperature for 4 hours. After cooling to room temperature, the reaction mixture was concentrated to approximately one-third volume and diluted with 150 ml of water. The resulting solid was collected by filtration and washed with one portion of water and one portion of n-butyl chloride. The yield of N-[(n-butyl)aminocarbonyl]-2-(methoxycarbonyl)-6-nitrophenylmethanesulfonamide, m.p. 144°-150°, was 9.1 g as a tan solid; IR(nujol): 1725, 1665 cm-1, NMR (CDCl3 /DMSO-d6): δ 0.6-1.7 (7H, m), 2.9-3.4 (2H, m), 4.0 (3H, s, CO2CH3), 5.7 (2H, s, --CH2 --), 7.4-8.3 (3H, m), 10.5 (1H, br s, NH).

Provenance & Evidence