5-(3,5-Dichlorophenyl)-3-(3-methyl-4-nitrophenyl)-5-trifluoromethyl-4,5-dihydroisoxazole → 3-(4-Amino-3-methylphenyl)-5-(3,5-dichlorophenyl)-5-trifluoromethyl-4,5-dihydroisoxazole

Temperature

100 °C

In a solution of 1.23 g of 5-(3,5-dichlorophenyl)-3-(3-methyl-4-nitrophenyl)-5-trifluoromethyl-4,5-dihydroisoxazole in 10 ml of ethyl acetate, 5.0 ml of water, 5.0 ml of acetic acid and 0.66 g of reduced iron were added and stirred at 100° C. for 2 hours. After the completion of the reaction, the reaction mixture was filtered through Celite, 20 ml of water was added in the filtrate, extracted with ethyl acetate (20 ml×2). The organic phases together were washed with 10 ml of saturated sodium hydrogen carbonate aqueous solution, and then with 10 ml of water, thereafter dehydrated with saturated sodium chloride aqueous solution and dried over anhydrous sodium sulfate, and then the solvent was distilled off under reduced pressure to obtain 1.05 g of crude aimed product as red-brown oily substance. The resulting product was used as such without purification for the next step.

1. customAfter the completion of the reaction
2. filtrationthe reaction mixture was filtered through Celite, 20 ml of water
3. additionwas added in the filtrate
4. extractionextracted with ethyl acetate (20 ml×2)
5. washThe organic phases together were washed with 10 ml of saturated sodium hydrogen carbonate aqueous solution
6. dry with materialdried over anhydrous sodium sulfate
7. distillationthe solvent was distilled off under reduced pressure

ORD record

ord-f45ac07da1384cd0b9b2b39cfcbd526e

Source dataset

uspto-grants-2011_09

DOI

10.6084/m9.figshare.5104873.v1

Patent number

US08022089B2