Patent ID: 8431710

Claim:
A process for the manufacture of a cyclic compound of formula (I): wherein R 1 is a halogenated alkyl group; wherein Z and Y are independently selected from the group consisting of oxygen, sulfur, nitrogen, and carbon; wherein A is a linking group between Z and Y comprising 0, 1, 2 or 3 atoms in the cycle, said process comprising: (a) adding an acid halide of formula R 1 —C(O)—X wherein X is selected from the group consisting of fluorine, chlorine, and bromine, and R 1 has the meaning given above, to a vinyl ether of formula (II) CH 2 ═CH—OR 2 (II) wherein R 2 is selected from the group consisting of alkyl groups, aralkyl groups, and aryl groups, to produce an addition product, and wherein the addition reaction of step (a) is carried out in the absence of a base; and (b) reacting said addition product with a compound of formula (III): Y-A-Z (III), wherein Z, Y and A are as defined above, and wherein the addition product supplied to step (b) is a crude product from step (a).