Patent application EP19305605A (EP), filed 2019-05-10
Publication number: EP3736260A1
Title: PROCESS FOR THE PREPARATION OF DIHALOBENZOPHENONES, NEW CHEMICALS USEFUL FOR ITS IMPLEMENTATION AND METHODS FOR PREPARING SAID CHEMICALS
Abstract: The invention relates to new compounds of formulae (IV):wherein X represents a halogen atom selected from the group consisting of fluorine, chlorine, bromine and iodine, said compounds being useful as precursors and/or intermediates for the preparation of 4,4'dihalobenzophenones of formula (I):wherein X is as defined above.
IPC codes: C07C  45/    69            A I
C07C  49/   807            A I
Claims: number: 1
text: Process for the preparation of a 4,4'-dihalobenzophenone of formula (I):
number: 2
text: Process according to claim 1, wherein the dehydrogenation/aromatization is carried out in the presence of a solvent.
number: 3
text: Compound of formula (IV):
number: 4
text: Compound according to claim 3, wherein the halogen atom is selected from fluorine and chlorine.
number: 5
text: Process for the preparation of a compound of formula (IV) as defined in any of claims 3 or 4, comprising reacting a 2-halobutadiene of formula (II) as defined above with a 4-haloacrylophenone of formula (III), and optionally further isolating compound of formula (IV).
number: 6
text: Process according to claim 5, wherein the molar ratio of the 2-halobutadiene of formula (II) to the 4-haloacrylophenone of formula (III) is of at least 1/1.
number: 7
text: Process for the preparation of a 4,4'-dihalobenzophenone of formula (I):
number: 8
text: Process for the preparation of a 4,4'-dihalobenzophenone of formula (I):
number: 9
text: Use of a compound of formula (IV) as defined in claim 3 for the manufacture of a poly(aryl ether ketone), in particular poly(ether ether ketone).
Office action: search_report, dated 2020-11-11
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Final disposition: pending (2020-11-11)