Patent ID: 8765980

Claim:
A process for the preparation of β,γ-unsaturated-γ,γ-disubstituted esters 1, said process comprising the step of reacting at a temperature of between about 100 and 350 degrees centigrade the conjugated malonate with a MX n in the presence of an inorganic proton source and optionally a polar solvent, wherein MX n is an inorganic salt or an organic cation/halide anion pair, X is a halide and n is an integer of 1 to 3, and M is a group I, II or III metal when MX n is an inorganic salt, or M is selected from the group consisting of pyrridinium, piperidinium, pyrrolidinium, imidazolium, ammonium, phosphonium and sulphonium, when MX n is an organic cation/halide anion pair; and wherein the groups R 1 , R 2 and R are organic residues independently selected from the group consisting of hydrogen; and linear, branched or (poly)cyclic C 1-15 alkyl, aryl or arylalkyl groups, which optionally contain unsaturated bonds and/or 1 to 4 heteroatoms independently selected from O, S, N and Si.