Preparation of .alpha.,.beta.-unsaturated nitriles

Details Preparation of .alpha.,.beta.-unsaturated nitriles Preparation of .alpha.,.beta.-unsaturated nitriles

1980-04-24

1982-02-16

Brust, Joseph Paul

Chemistry of carbon compounds

Miscellaneous organic carbon compounds

C-metal

546246, 260465B, 260464, C07C12010

Patent

active

043158692

ABSTRACT:
.alpha.,.beta.-Unsaturated nitriles are prepared by reacting an aldehyde with formamide in the presence of an acid and the presence or absence of a non-aromatic solvent to give an N-alkenyl-formamide, which is then passed, in the gas phase, over a dehydration catalyst at an elevated temperature.
The nitriles obtainable by the process of the invention are valuable starting materials for the preparation of dyes, crop protection agents, plasticizers and drugs.

REFERENCES:
patent: 3256311 (1966-06-01), Becke et al.
patent: 3514478 (1970-05-01), Becke et al.
Eiden et al., Archiv. der Pharmazie, 299, (1966), pp. 493-498.
Houben-Weyl, Methoden der Organischen Chemie, vol. 4/2, pp. 209-218, 1955.
Ullmanns Encyklopadie der technischen Chemie, vol. 12, pp. 751-764, (1960).
Moffat, Journal of Physical Chemistry, 81, (1977), pp. 82-86.
Lenz, Synthesis, 1978, pp. 489-495.

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