Patent ID: 9567293
Date: 2017-02-14
CPC Classifications: C07C,C08F,C08G,C11B

Claim:
1. A process for the conjugate synthesis of a monounsaturated nitrile ester (acid) and of a difunctional carbonyl compound (V), of formula R 2 —(CH 2 ) n —COR′ in which R′ is H or OH, from the same unsaturated fatty compound (I) comprising at least one ester or acid function, respectively, of formula: in which R wherein the process comprises: a step of cross metathesis cm1 of compound (I) with an unsaturated nitrile compound (II) chosen from: acrylonitrile, fumaronitrile, 2-butenenitrile, 1-butenenitrile, 2-pentenenitrile, 3-pentenenitrile, 4-pentenenitrile and 1-pentenenitrile, in which cm1 is brought to partial conversion so as to obtain, and to recover separately, at least the following products: a monounsaturated acid (ester)-nitrile (Ill) and a symmetrical compound (IV), respectively a diester or diacid comprising a double bond located in the middle of the molecular chain of compound (IV) of formula R a step of oxidative cleavage cl2 of the double bond respectively of the diester or diacid compound (IV), so as to form a single type of carbonyl compound (V) of formula R in which the cross metathesis step is performed to a degree of conversion in the range from 30% to 90%.