| 摘要 |
The invention comprises a nitrile corresponding to the general formula: X-NH-CH(CN)-R wherein X is naphthyl, hydroxyphenyl or alkyl-hydroxyphenyl, and R is a higher alkyl group having at least 6 carbon atoms. The nitrile compounds are prepared by addition of an appropriate amine to a suitable cyanohydrin which is prepared by the addition of hydrogen cyanide to the corresponding aldehyde. The reaction of hydrogen cyanide and the aldehyde, for example, may be performed in the same reaction vessel wherein the amine is reacted to produce the final aminonitrile. Besides hydrogen cyanide, any suitable cyanide generating compound may be used and any aliphatic aldehyde having at least 7 carbon atoms is also suitable as starting material. Preferred aldehydes include heptaldehyde, octaldehyde, nonaldehyde, decanaldehyde, hendecanaldehyde and dodecanaldehyde. Preferred amino compounds for reaction with the cyanohydrin compound are the aminophenols, such as p-amino- and substituted-p-aminophenols. Preferably also, alkylaminophenols, e.g. methylaminophenol, dimethylaminophenol, ethylaminophenol, diethylaminophenol, propylaminophenol, dipropylaminophenol, butylaminophenol, dibutylaminophenol, pentylaminophenol, dipentylaminophenol, hexylaminophenol, dihexylaminophenol. Examples are given of the preparation of a -(p-hydroxyanilino)-n-octanenitrile, a -(p-hydroxyanilino)-trimethyloctanenitrile, a -(p-hydroxyanilino)-n-tridecanenitrile, a -(4-hydroxy-3, 5-di-t-butylanilino)-n-octanenitrile, a -(1-naphthylamino)-n-octanenitrile. Specification 512,691 is referred to.ALSO:Lubricating oil is stabilized against oxidative deterioration by the addition of phenylnitriles corresponding to the general formula X-NH-CH(CN)-R wherein X is naphthyl, hydroxyphenyl or alkyl-hydroxyphenol, and R is a higher alkyl group having at least 6 carbon atoms. Examples are given of the stabilization of mineral oil by the addition of 0.05% by weight of a -(p-hydroxy-anilino) - n - octanenitrile or 0.05% by weight of each of a - (p - hydroxyanilino) - trimethyl - octanenitrile, a - (p - hydroxyanilino) - n - tridecane - nitrile, a - (4 - hydroxy - 3,5 - di - t. - butylanilino) - n - octanenitrile, a - (1 - naphthylamino) - n - octanenitrile. Specification 512,691 is referred to.
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