| 摘要 |
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 DEG 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. |
