1,1'-Carbonyldiimidazole → 3,3,3-Trifluoro-2-hydroxy-2-methyl-N-[2-nitro-4-(phenylsulfonyl)phenyl]propanamide

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Reaction Conditions

Reaction Steps

A mixture of 3,3,3-trifluoro-2-hydroxy-2-methylpropanoic acid (1.00 g), 1,1'-carbonyldiimidazole (1.03 g) and dry tetrahydrofuran (25 mL) was heated, under N2, at 45° C. in an ultrasound bath for 0.5 hours. 2-Nitro-4-(phenylsulfonyl)aniline (1.75 g) was added, the mixture was heated at 45° C. for 18 hours; poured onto water (350 mL) and extracted with Et2O. The combined extracts were washed (brine), dried and evaporated to give an orange solid (3.01 g) that was purified by chromatographed, with chloroform as the eluent, to yield the title compound as a pale yellow solid (0.46 g); mp 191°-192.5° C.; MS: m/z=419(M+1); NMR: 1.58 (s,3), 7.63-7.76 (m,3), 8.02-8.07 (d,3), 8.34 (dd,1, J=2.2, 8.6), 8.59 (s,1), 8.61 (d,1, J=2.3). Analysis for C 16 H13F3N2O6S: Calculated: C, 45.94; H, 3.13; N, 6.70; Found: C, 45.95; H, 3.19; N, 6.53.

Provenance & Evidence