Patent ID: 11919834
Assignee: SOLVAY SPECIALTY POLYMERS ITALY S.P.A.
Field: Organic fine chemistry (Chemistry)
Classification: CPC C | IPC C

Claim 0:
1. A method for manufacturing a compound of general formula [formula (I)]:, wherein each of G and G′, equal to or different from each other, is independently selected from the group consisting of
halogens selected from F, Cl, Br, I;
—NRH1RH2, with RH1 and RH2 being independently H or a C1-C6, hydrocarbon group;
—OH;
nitrile group of formula —CN and nitro group of formula —NO2;
—COY, with Y being —X, with X being a halogen selected from F, Cl, Br, I; —OH; —ORH3, —NRH1RH2, with RH3 being a C1-C12 hydrocarbon group; and RH1 and RH2 having the meaning detailed above;
—SO2Y′, with Y′ being —OH, or being —X′, with X′ being a halogen selected from F, Cl, Br, I;
-E-Ar—X″, with X″ being hydrogen, —OH, —Xoo, —C(O)X# with X# being —OH, or being —Xoo; with Xoo being a halogen selected from F, Cl, Br, I; -E- being a divalent bridging group selected from the group consisting of a bond, a C1-C6 carbon-containing bridging group; a sulphur-containing bridging group,
a group of formula, with Xz being —NH2; —NO2; —OH, —Xoo, —C(O)X# with X# being —OH, or being —Xoo; with Xoo being a halogen selected from F, Cl, Br, I;
each of n, equal to or different from each other, is an integer of 1 to 3, said method comprising:

Step (a): a step of reacting an anion of formula [formula (II)]:, wherein G″ is a group G or G′, as described above, or is a precursor thereof, with tetrafluoroethylene at a temperature of at most 115° C. and at a pressure of at least 4 bar, so as to obtain a compound of formula [formula (III)]:, Step (b): a step of dimerizing at least one compound of formula (III) obtained from step (a) by thermal treatment at a temperature exceeding 150° C., so as to obtain a compound of formula [formula (IV)]:, wherein each of G″ and G′″ is a group G or G′, as described above, or is a precursor thereof, being understood that when G″ and G′″ are a group G or G′ as detailed above, compound of formula (IV) qualifies as a compound of formula (I); and
Step (c): optionally, a step of reacting compound of formula (IV) in appropriate conditions to transform precursor groups G″ and G′″ of formula (IV) into groups G and G′ so as to obtain compound of formula (I) above.