Isopropanol → 2-[3-(Aminooxy)propoxy]-5-(trifluoromethyl)pyridine
Reaction equation
[F:1][C:2]([F:26])([F:25])[C:3]1[CH:4]=[CH:5][C:6]([O:9][CH2:10][CH2:11][CH2:12][O:13][N:14]2C(=O)C3=CC=CC=C3C2=O)=[N:7][CH:8]=1.C(Cl)(Cl)Cl.O.NN.C(O)(C)C>CCCCCC>[F:25][C:2]([F:1])([F:26])[C:3]1[CH:4]=[CH:5][C:6]([O:9][CH2:10][CH2:11][CH2:12][O:13][NH2:14])=[N:7][CH:8]=1Participants
Procedure
To a mixture of 12.8 g of N-(3-(5-trifluoromethyl-2-pyridyloxy)propyloxy)phthalimide and 150 ml of chloroform was slowly added dropwise a mixture of 1.74 g of hydrazine hydrate and 1.5 ml of isopropyl alcohol at room temperature. After stirring for 3 hours with heating under reflux, the reaction mixture was returned to room temperature, in which 150 ml of hexane was poured. The reaction mixture was filtered through Celite, and the filtrate was concentrated to give a residue, in which 100 ml of hexane was again poured. This hexane solution was left stand in a refrigerator in 3 days. The deposited crystals were collected by filtration, and dried under reduced pressure, which afforded 7.0 g (yield, 85%) of O-(3-(5-trifluoromethyl-2-pyridyloxy)propyl)hydroxylamine, nD24.0 1.4652.
Workup
- additionwas slowly added dropwise
- temperaturewith heating
- temperatureunder reflux
- additionwas poured
- filtrationThe reaction mixture was filtered through Celite
- concentrationthe filtrate was concentrated
- customto give a residue
- filtrationThe deposited crystals were collected by filtration
- customdried under reduced pressure, which
Sources & evidence
- ORD record
- ord-ae05c150b289489fb4221dd6690118c8
- Source dataset
- uspto-grants-2002_09
- Patent number
- US06448444B1
Reaction notes
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