Ammonia → 2,6-Dimethylcyclohexylamine
反応式
[CH3:1][C:2]1[CH:7]=[CH:6][CH:5]=[C:4]([CH3:8])[C:3]=1O.[O-2].[Pr+3].[O-2].[O-2].[Pr+3].[O-2].[Al+3].[O-2].[O-2].[Al+3].[NH3:20]>[H][H].[Pd]>[CH3:1][CH:2]1[CH2:7][CH2:6][CH2:5][CH:4]([CH3:8])[CH:3]1[NH2:20][CH3:1][C:2]1[CH:7]=[CH:6][CH:5]=[C:4]([CH3:8])[C:3]=1O.[O-2].[Pr+3].[O-2].[O-2].[Pr+3].[O-2].[Al+3].[O-2].[O-2].[Al+3].[NH3:20]>[H][H].[Pd]>[CH3:1][CH:2]1[CH2:7][CH2:6][CH2:5][CH:4]([CH3:8])[CH:3]1[NH2:20]1.650 kg of 2,6-dimethylphenol and 150 g of a pulverulent catalyst which contains 5.0% by weight of palladium and 2.5% by weight of praseodymium oxide, the remainder being aluminum oxide, are introduced into a 10 l stirred autoclave. The autoclave is closed and 1.370 kg of ammonia are forced in. The mixture is then heated to 230° C. and a pressure of 200 bar is established by forcing in hydrogen. The mixture is kept at the reaction temperature until a constant pressure is achieved (about 8 hours). It is then left to cool, and is filtered to give 1.710 kg of crude 2,6-dimethylcyclohexylamine (a mixture of 3 stereoisomeric 2,6-dimethylcyclohexylamines). The crude product is distilled to give 1.685 kg of 2,6-dimethylcyclohexylamine, boiling point=167°-168° C., corresponding to a yield of 98%.
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