Preparation of nitriles from formamides

Details Preparation of nitriles from formamides Preparation of nitriles from formamides

1982-01-20

1983-12-06

Brust, Joseph Paul

Chemistry of carbon compounds

Miscellaneous organic carbon compounds

C-metal

260464, 260465B, C07C12000, C07C12010

Patent

active

044192975

ABSTRACT:
Aliphatic, araliphatic or aromatic nitriles of the formula R--CN are obtained by reacting N-substituted formamides of the formula R--NHCHO with at least the stoichiometric quantity of an acylating agent (generally a carboxylic acid anhydride, such as acetic anhydride, or ketene) in the gas phase at temperatures above 250.degree. C., without using a catalyst. The process is especially useful in the preparation of nitriles wherein the connecting carbon of R is a tertiary carbon atom. The nitriles are important intermediate products, for example for the preparation of herbicides, surface-active agents and anti-corrosive agents.

REFERENCES:
patent: 2121551 (1938-06-01), Rigby
patent: 2417749 (1947-03-01), Hagemeyer, Jr.
patent: 2458373 (1949-01-01), Hagemeyer, Jr.
patent: 3256311 (1966-06-01), Becke et al.
patent: 3514478 (1970-05-01), Becke et al.
patent: 4203917 (1980-05-01), Delmon et al.
patent: 4315869 (1982-02-01), Merger et al.
Chemical Abstracts, vol. 72, Jan. 5, 1970, pp. 348, 349,[3701b] (Grrenhalgh et al.).

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