Hydroxylamine → HCID 52914535, compound

Participants

Reaction Conditions

Reaction Steps

Hydroxylamine (50 wt % solution in water, 0.45 mL, 7.3 mmol) was added to 5-(diethylamino)-3-ethyl-1-(4-hydroxyphenyl)-1H-pyrazole-4-carbonitrile (16 mg, 0.06 mmol) dissolved in DMSO (1 mL) in a microwave vial. The reaction was heated at 160° C. in the microwave for 30 min. Purification using preparative HPLC gave (Z)-5-(diethylamino)-3-ethyl-N′-hydroxy-1-(4-hydroxyphenyl)-1H-pyrazole-4-carboximidamide (6.22 mg, 35%). Identification of the title compound by 1II-NMR showed that the oxime product was a single isomer, but did not confirm whether the (E) or (Z) oxime isomer had been obtained. ES/MS m/z: 318.29 (M+H), 316.32 (M−H); 1H NMR (acetone-d6, 500 MHz): 7.40 (m, 2H), 6.90 (m, 2H), 2.96 (q, 4H, J=7.2 Hz), 2.65 (q, 2H, J=7.4 Hz), 1.19 (t, 3H, J=7.4 Hz) and 0.95 (t, 6H, J=7.2 Hz).

Provenance & Evidence