The present invention provides a process whereby fluorinated ketones of various structures can be produced by short process steps and which is useful as an industrial production process.
Namely, it is a process for producing a fluorinated ketone of the following formula (5), which comprises reacting a compound of the following formula (3) having a fluorine content of at least 30 mass %, with fluorine in a liquid phase to obtain a compound of the following formula (4), and then, subjecting the ester linkage of the compound of the formula (4) to a dissociation reaction:
R
C
COOCHR
A
R
B
(3)
R
CF
COOCFR
AF
R
BF
(4)
R
AF
R
BF
C═O (5)
wherein each of R
A
and R
AF
are each a monovalent organic group such as an alkyl group, or R
A
and R
B
may be bonded to each other to form a bivalent organic group such as an alkylene group, R
AF
and R
BF
are a monovalent organic group such as a perfluoroalkyl group formed by fluorination of R
A
and R
B
, or they are bonded to each other to form a bivalent organic group such as a perfluoroalkylene group, and R
C
and R
CF
are each a monovalent organic group such as a perfluoroalkyl group which may contain an etheric oxygen atom.
本发明提供了一种过程,可以通过简短的步骤生产各种结构的
氟化酮,适用于工业生产过程。即,本发明提供了一种制备以下式(5)的
氟化酮的方法,包括将具有至少30质量%
氟含量的以下式(3)的化合物与液相中的
氟反应,得到以下式(4)的化合物,然后,使式(4)的酯键发生解离反应:RCCOOCHRARB(3)RCFCOOCFRAFRBF(4)RAFRBFC═O (5)其中,RA和RAF各自是一种一价有机基团,例如烷基,或者RA和RB可以连接形成一种二价有机基团,例如烷基;RAF和RBF是通过对RA和RB进行
氟化形成的一种一价有机基团,或者它们连接形成一种二价有机基团,例如
全氟烷基;RC和RCF各自是一种一价有机基团,例如
全氟烷基,可能含有乙氧基氧原子。