| 摘要 |
PURPOSE:To safely obtain the titled stable high-quality compound in high yield by simple operation in a short time, by reducing an aromatic nitro compound in the presence of a hydrogen donor, e.g. formic acid, etc., in a solvent under ordinary pressure using a specific, safe, readily handleable and inexpensive catalyst. CONSTITUTION:An aromatic nitro compound expressed by formula I (X is H, Cl, OCH3 or CH3) is reduced in the presence of a hydrogenation catalyst selected from complexes expressed by formulas II, III and IV and Pd/C and a hydrogen donor selected from formic acid, acetic acid and formates in a solvent at 20-100 deg.C under ordinary pressure to afford the aimed compound expressed by formula V. Alcohols (particularly inexpensive and readily recoverable CH3OH) are preferably used as the solvent. The reaction can be safely carried out using an ordinary reaction apparatus in the same reactor at a low cost and operability is excellent. The method is economical and suitable for mass production. The equipment cost is low with hardly any deterioration of the catalyst and environmental pollution. The resultant compound is used as an intermediate for dyes or other organic synthetic chemicals. |
