Hydrogenation of Dinitriles to Aminonitriles

34 catalyst in diaminoethane at 100°Cand7MPaH2.68 In another patent, succinoni-trile was hydrogenated to a product mixture comprising 85% aminobutyronitrile, 14% diaminolactone, and 1% pyrrolidine at 100% conversion over Raney Ni in diaminoethane at 80°C and 7 MPa H2. The Raney Ni was washed with anhydrous MeOH, treated with KOMe in MeOH and then washed with diaminoethane.69 Iron catalysts have also been applied to the selective hydrogenation of aliphatic dinitriles to aminonitriles.70 

4-Cyclohexanedicarbonitrile was converted to a mixture of 61.9% of 4-(ami-nomethyl)cyclohexanecarbonitrile, 19.8% of l,4-cyclohexanebis(methylamine), and 

TABLE 7.1 Hydrogenation of a to -Dinitriles to co-Aminonitriles over Rh-MgO Catalyst  

In NC(CH2)nCN Conversion (%) Aminonitrile Cyclic Imine Diamine Dimeric product 

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Selective hydrogenation of dinitriles to aminonitriles on Raney catalysts... 

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