[EN] PROCESS FOR THE PREPARATION OF 5-FLUORO-1H-PYRAZOLES<br/>[FR] PROCÉDÉ POUR LA PRÉPARATION DE 5-FLUORO-1H-PYRAZOLES
申请人:BAYER CROPSCIENCE AG
公开号:WO2014012975A1
公开(公告)日:2014-01-23
A new process for the preparation of 5-fluoro-1H-pyrazoles of the general formula (I), is described, resulting from the reaction of an olefin of the general formula (II) with hydrazines of the formula (III) R1-NH-NH2 (III), wherein R1 is selected from C1-C6 alkyl, C5-C10 aryl; R2 is a trihalomethyl moiety with at least one fluorine atom; and R3 is selected from C1-C5 haloalkyl, CF3, C2F5, C3F7, CF2CF2CI, CFCICF3, in the presence of water and a base.
PROCESS FOR THE PREPARATION OF 5-FLUORO-1H-PYRAZOLES
申请人:BAYER CROPSCIENE AG
公开号:US20150152062A1
公开(公告)日:2015-06-04
A new process for the preparation of 5-fluoro-1H-pyrazoles of the general formula (I)
is described, resulting from the reaction of an olefin of the general formula (II)
with hydrazines of the formula (III)
R
1
—NH—NH
2
(III),
wherein
R
1
is selected from C
1
-C
6
alkyl, C
5
-C
10
aryl;
R
2
is a trihalomethyl moiety with at least one fluorine atom; and
R
3
is selected from C
1
-C
5
haloalkyl, CF
3
, C
2
F
5
, C
3
F
7
, CF
2
CF
2
Cl, CFClCF
3
,
in the presence of water and a base.