Patent ID: 9604915
Date: 2017-03-28
CPC Classifications: C07C

Claim:
1. A process for the preparation of a compound of formula (I): wherein G is —CN or —COOR in which R is a C said process comprising the step of reacting a compound of formula (II): wherein G, X and Y are as defined above with a compound of formula (III): wherein Z is CO or SO with the proviso that: i) when Z is CO the reaction is carried out at a temperature ranging from 120° C. to 180° C. and the molar ratio between the compound of formula (II) and the compound of formula (III) is from 1:10 to 1:30; ii) when Z is SO to obtain a compound of formula (I) wherein the reaction is carried out in the presence of a compound able to complex alkaline metal cations selected from the group consisting of polyethylene glycols (PEG), phosphonium salts and crown ethers.