| abstract |
PURPOSE: To obtain a compound useful as a synthetic intermediate for heat- and pressure-sensitive paper, xanthene dyes, etc., in high selectivity without problems in material corrosion, by reacting an aminophenol with an aldehyde under specific condition. n CONSTITUTION: An aminophenol is reacted with an aldehyde expressed by the formula R.CHO (R is 1W5C alkyl) in the presence of a platinum or/and catalyst supported on active carbon carrier in a solvent, e.g. aliphatic alcohol, under 2W30kg/cm 2 G pressure of hydrogen at 0W80°C to afford the aimed substance. In the process, the molar ratio of the aminophenol to the aldehyde is ≥1.5W<4 and the aldehyde is continuously introduced into the reaction system at ≤0.1mol/ min introduction rate based on 1mol aminophenol to carry out the reaction. n COPYRIGHT: (C)1987,JPO&Japio |