Process for hydrogenation of cyanopropionaldehyde-containing cya

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

1997-06-16

1998-12-08

Burn, Brian M.

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

Organic compounds

Amino nitrogen containing

C07C20946

Patent

active

058472207

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 ammonia or a primary amine and alkali metal hydroxide.

REFERENCES:
patent: 2449036 (1948-09-01), Grunfeld
patent: 3427356 (1969-02-01), Baer et al.
patent: 3896173 (1975-07-01), Drake
patent: 4375003 (1983-02-01), Allain et al.

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