Patent ID: 9670145
Date: 2017-06-06
CPC Classifications: C07C,C07D,C07F

Claim:
1. Process for preparing 1,1-disubstituted ethylene monomers of general formula (I) wherein: A and D are independently selected from each other from the following functional groups: CN, CO characterized in that it comprises the reaction of a compound of general formula (II) wherein: E is (CH m is between 1 and 20, X is O or S, when n=1, F is selected from the functional groups: when n=2, F is selected from the functional groups: when n=3, F is: G is selected from the functional groups: G and F are independently selected from each other, and R when n=1, F may be connected to G through one R with a compound of general formula (III) in the presence of a catalytic amount of an ammonium or iminium salt, wherein this salt is in homogeneous phase or supported on a solid substrate.