Hydroxyamine hydrochloride → HCID 53722706, compound

Reaction equation

C([O-])(=O)C.[Na+].Cl.[NH2:7]O.C(O[CH:12]=[C:13]([C:30]([C:32]1([CH3:35])[CH2:34][CH2:33]1)=[O:31])[C:14]([C:16]1[CH:21]=[CH:20][C:19]([S:22]([CH3:25])(=[O:24])=[O:23])=[CH:18][C:17]=1[C:26]([F:29])([F:28])[F:27])=[O:15])C>>[CH3:25][S:22]([C:19]1[CH:20]=[CH:21][C:16]([C:14]([C:13]2[CH:12]=[N:7][O:31][C:30]=2[C:32]2([CH3:35])[CH2:34][CH2:33]2)=[O:15])=[C:17]([C:26]([F:29])([F:28])[F:27])[CH:18]=1)(=[O:24])=[O:23]

Participants

Reactant 3

HCID 443297Hydroxyamine hydrochloride

HCID 517045Sodium Acetate

HCID 54056056HCID 54056056, compound

Product 1

HCID 53722706HCID 53722706, compoundYield 90.3%

Procedure

Sodium acetate (1.0 g) was added to a stirring mixture of hydroxylamine hydrochloride (0.85 g) and 2-ethoxymethylene-1-(4-methylsulphonyl-2-trifluoromethylphenyl)-3-(1-methylcyclopropyl)propane-1,3-dione (4.2 g) in industrial methylated spirit (200 ml). The mixture was stirred at room temperature for 3 hours. The mixture was evaporated to dryness and then suspended in ethyl acetate (100 ml). The resultant suspension was washed with water (10 ml), dried (anhydrous magnesium sulphate) and filtered. The filtrate was evaporated to dryness to give 4-(4-methylsulphonyl-2-trifluoromethylbenzoyl)-5-(1-methylcyclopropyl)isoxazole (compound 99, 3.5 g) as a white solid, m.p. 141°-142° C.