Back to results
US 10,377,720 B2Granted
Process for preparing a hydroxylamine pyrazole compound
AssigneeAdama Makhteshim Ltd.
InventorsGal Suez, Michael Grabarnick, Alexander Frenklah, Heinz Steiner
Life of this patent
Estimating the term…
Abstract
A process for preparing, 2-[[[1-(4-chlorophenyl)-1H-pyrazol-3-yl]oxy]methyl]-N-hydroxy-benzenamine of formula (I) comprising: mixing 1-(4-chlorophenyl)-3-[(2 -nitrophenyl)methoxy]-1H-pyrazole of formula (II) with a nitrogen-containing base, a sulfur compound, a solvent and a platinum-based catalyst in the presence of hydrogen.
Claims18
A process for preparing 2-[[[1-(4-chlorophenyl)-1H-pyrazol-3-yl]oxy]methyl]-N-hydroxy-benzenamine of formula (I)
- the process comprising:
- mixing 1-(4-chlorophenyl)-3-[(2-nitrophenyl)methoxy]-1H-pyrazole of formula (II)
- with a nitrogen-containing base, a sulfur compound, a solvent and a platinum-based catalyst in the presence of hydrogen, wherein the solvent is a polar aprotic solvent.
A process for preparing methyl 2-((1-(4-chlorophenyl)- 1H-pyrazol-3 -yloxy)methyl)phenyl(hydroxy)carbamate of formula (III)
- the process comprising:
- mixing 1-(4-chlorophenyl)-3-[(2-nitrophenyl)methoxy]-1H-pyrazole of formula (II)
- with a nitrogen-containing base, a sulfur compound, a solvent and a platinum-based catalyst in the presence of hydrogen, wherein the solvent is a polar aprotic solvent, to give 2-[[[1-(4-chlorophenyl)- 1H-pyrazol-3 -yl]oxy]methyl]-N-hydroxy-benzenamine of formula (I)
- and subsequent reacting the resulting compound of formula (I) with methylchloroformate in the presence of a base.
1 more element
Dependencies are inferred from the claim text.