Patent application EP19305606A (EP), filed 2019-05-10
Publication number: EP3736259A1
Title: NEW CYCLOADDUCT PRECURSORS OF DIHALOBENZOPHENONES AND PREPARATIONS THEREOF
Abstract: [0001]    The invention relates to new compounds of formula (I):

<img class="EMIRef" id="681419130-ia01" />
wherein X represents a halogen atom selected from the group consisting of fluorine, chlorine, bromine and iodine, which are useful for the preparation of 4,4'dihalobenzophenones of formula (III):

<img class="EMIRef" id="681419130-ia02" />
wherein X is as defined above.
IPC codes: C07C  45/    61            A I
C07C  49/   543            A I
C07C  45/    69            A I
C07C  45/    65            A I
C07C  49/   567            A I
C07C  49/   813            A I
C08G  65/    40            A I
Claims: number: 1
text: Compound of formula (I):
number: 2
text: Compound according to claim 1, wherein the halogen atom is selected from fluorine and chlorine.
number: 3
text: Process for the preparation of a compound of formula (I) as defined in claim 1 or 2, comprising reacting divinylketone with a 2-halobutadiene (II):
number: 4
text: Process according to claim 3, wherein the 2-halobutadiene is 2-chlorobutadiene or 2-fluorobutadiene.
number: 5
text: Process according to claim 3 or 4, wherein the molar ratio of the 2-halobutadiene of formula (II) to divinylketone is of at least 2/1.
number: 6
text: Use of a compound of formula (I) as defined in claim 1 or 2, for the preparation of a 4,4'-dihalobenzophenone of formula (III):
number: 7
text: Process for the preparation of a 4,4'-dihalobenzophenone of formula (III):
number: 8
text: Process according to claim 6 or 7, wherein the dehydrogenation/aromatization is carried out in the presence of a solvent.
number: 9
text: Process for the preparation of a 4,4'-dihalobenzophenone of formula (III):
number: 10
text: Process according to claim 9, wherein compound of formula (I) is prepared by reacting divinylketone with a 2-halobutadiene of formula (II):
number: 11
text: Use of a compound of formula (I) as defined in claim 1 or 2 for the manufacture of a poly(aryl ether ketone).
number: 12
text: Use according to claim 11, wherein the poly(aryl ether ketone) is poly(ether ether ketone).
number: 13
text: Use of a 4,4'-dihalobenzophenone of formula (III):
number: 14
text: Use according to claim 13, wherein X represents a fluorine atom.
Office action: search_report, dated 2020-11-11
Prior art cited: ref_id: US4943358A
ref_type: patent
severity: background
ref_id: WO2012001131A1
ref_type: patent
severity: background
ref_id: US5777172A
ref_type: patent
severity: background
ref_id: US7687668B2
ref_type: patent
severity: background
ref_id: US2469848A
ref_type: patent
severity: background
ref_id: US2437308A
ref_type: patent
severity: background
ref_id: US2451612A
ref_type: patent
severity: background
ref_id: US2437148A
ref_type: patent
severity: background
ref_id: US4453009A
ref_type: patent
severity: background
ref_id: US2002161227A1
ref_type: patent
severity: background
ref_id: US4792618A
ref_type: patent
severity: background
ref_id: US4873372A
ref_type: patent
severity: background
ref_id: US3953400A
ref_type: patent
severity: background
ref_id: US3956240A
ref_type: patent
severity: background
ref_id: US3928295A
ref_type: patent
severity: background
ref_id: US4176222A
ref_type: patent
severity: background
ref_id: - DUNLOP ET AL.: "The preparation of 4- uoro- and 4,4'-difluorobenzophenone", J. AM. CHEM. SOC., vol. 55, no. 4, 1933, pages 1665 - 1666
ref_type: npl
severity: background
ref_id: - J. GEN. CHEM. USSR, vol. 33, no. 5, 1963, pages 1512
ref_type: npl
severity: background
ref_id: - CHEM. EUR. J., vol. 13, 2007, pages 3354 - 3368
ref_type: npl
severity: background
ref_id: - ORG. BIOMOL. CHEM., vol. 8, 2010, pages 751 - 754
ref_type: npl
severity: background
ref_id: WO2007014692A1
ref_type: patent
severity: background
ref_id: US5777172A
ref_type: patent
severity: background
ref_id: US5777172
ref_type: patent
severity: background
ref_id: WO2007014692
ref_type: patent
severity: background
Final disposition: pending (2020-11-11)