Water → HCID 24757165, compound

Participants

Reaction Steps

A solution of cyclohexanone oxime (2.66 g, 23.51 mmol) in methylene chloride (50 mL) was added dropwise with stirring to a solution of LTA (10.42 g, 23.51 mmol) and 4-nitrobenzoic acid (39.29 g, 235.1 mmol) in methylene chloride (300 mL) at 0° C. A blue color gradually appeared with the addition of the oxime. After 1 h at 0° C., the reaction mixture was warmed to room temperature. After 3 h at room temperature, water (50 mL) was added and the organic layer was extracted with water (2×50 mL) and 3% sodium bicarbonate solution (2×50 mL). The organic layer was dried over Na2SO4, the solvent evaporated and the residue was recrystallized in diethyl ether/petroleum ether (1:1) in a −5° C. freezer to give 1-Nitroso-1-para-nitrobenzoxycyclohexane as bright blue crystals (20-25% yield): Rf 0.55 (pentane/ethyl acetate=20:1); 1H NMR (300 MHz, Benzene-d6) δ 1.17-2.04 (m, 10H), 7.38-7.98 (d, 4H); 13C NMR (300 MHz, Benzene-d6) δ 22.1 (2CH2), 25.0 (CH2), 29.7 (2CH2), 123.8 (2Ph-CH), 125.3 (O—C—N), 131.1 (2Ph-CH), 135.3 (Ph-C), 151.1 (Ph-C), 162.6 (C═O).

Provenance & Evidence