3-羟基苄肼二盐酸盐

反应条件: temp:0.00; pressure:0.00; stir:; See reaction.notes.procedure_details.

实验步骤: Prepare the title compound from 1-[1-phenyl-3-methyl-5-oxo-4,5-dihydro-1H-pyrazol-4-yl]-butane-1,3-dione and 3-hydroxybenzyl hydrazine dihydrochloride according to the procedure of Example 28.

反应条件: temp:0.00; pressure:0.00; stir:; See reaction.notes.procedure_details.

实验步骤: A stirred mixture of 4-(3,5-dibromo-4-hydroxyphenyl)-4-oxobutanoic acid (H) (150 mg, 0.426 mmol) and 3-hydroxybenzylhydrazine dihydrochloride (135 mg, 0.639 mmol) in ethanol was heated to reflux. After heating for 16 h, the reaction mixture was cooled down and the precipitate formed was collected and dried in vacuo. This gave the title compound as a red solid (95 mg, 49%)1H NMR δ (ppm) (DMSO-d6): 2.59 (2 H, t), 3.01 (2 H, t, J=8.2 Hz), 4.88 (2H, s), 6.67 (1 H, d, J=8.2 Hz), 6.69-6.76 (2 H, m), 7.14 (1 H, t, J=7.8 Hz), 7.92 (2 H, s), 9.39 (1 H, s), 10.44 (1 H, s). LCMS (10 cm_apci_formic) Rt 3.33 min; m/z 453/455/457 [M+H]. was heated to reflux After heating for 16 h the reaction mixture was cooled down the precipitate formed was collected dried in vacuo

反应条件: temp:0.00; pressure:0.00; stir:; See reaction.notes.procedure_details.

实验步骤: Prepare the title compound from 1-[1-phenyl-3-methyl-5-oxo-4,5-dihydro-1H-pyrazol-4-yl]-butane-1,3-dione and 3-hydroxybenzyl hydrazine dihydrochloride according to the procedure of Example 28.