Process for hydrogenation of cyanopropionaldehyde-containing cya

Details Process for hydrogenation of cyanopropionaldehyde-containing cya Process for hydrogenation of cyanopropionaldehyde-containing cya

1997-10-28

1999-03-23

Trinh, Ba K.

Organic compounds -- part of the class 532-570 series

Organic compounds

Amino nitrogen containing

564491, 564473, 564504, C07C20948

Patent

active

058862277

ABSTRACT:
Disclosed is an improved process for the catalytic hydrogenation of cyanopropionaldehyde alkyl acetals (CPAA) to form the aminobutyraldehyde alkyl acetals. The basic process comprises hydrogenating the cyanopropionaldehyde alkyl acetals by contacting said cyanopropionaldehyde alkyl acetals with hydrogen in the presence of a nickel or cobalt catalyst under conditions for reducing the nitrile group to the primary amine. The improvement resides in effecting the hydrogenation of a cyanopropionitrile dialkyl acetal feedstock containing contaminating levels of cyanopropionaldehyde in the presence of a secondary alkanol or water.

REFERENCES:
patent: 4885391 (1989-12-01), Herkes
patent: 5741930 (1998-04-01), Hearn et al.

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