1,3-Bis(3-nitrophenoxy)-5-trifluoromethylbenzene → 1,3-Bis(3-aminophenoxy)-5-trifluoromethylbenzene

HRID 1655100Notes

Reaction equation

[N+:1]([C:4]1[CH:5]=[C:6]([CH:28]=[CH:29][CH:30]=1)[O:7][C:8]1[CH:13]=[C:12]([C:14]([F:17])([F:16])[F:15])[CH:11]=[C:10]([O:18][C:19]2[CH:24]=[CH:23][CH:22]=[C:21]([N+:25]([O-])=O)[CH:20]=2)[CH:9]=1)([O-])=O.[H][H]>[Pd].COCCO>[NH2:1][C:4]1[CH:5]=[C:6]([CH:28]=[CH:29][CH:30]=1)[O:7][C:8]1[CH:13]=[C:12]([C:14]([F:16])([F:17])[F:15])[CH:11]=[C:10]([O:18][C:19]2[CH:24]=[CH:23][CH:22]=[C:21]([NH2:25])[CH:20]=2)[CH:9]=1

Participants

Conditions

Temperature: 90 °C

Procedure

To a reducing apparatus equipped with a thermometer, reflux condenser and stirrer, 55 g (0.131 mol) of 1,3-bis(3-nitrophenoxy)-5-trifluoromethylbenzene, 150 g of methyl cellosolve and 5 g of 5% Pd/c having a moisture content of 50% were charged and reacted in a hydrogen atmosphere at 70°~80° C. for 4 hours. After finishing the reaction, the catalyst was filtered off. The filtrate was heated to 90° C., mixed with 140 g of water and cooled to room temperature. The precipitated crystals were filtered and dried under reduced pressure to obtain 1,3-bis(3-aminophenoxy)-5-trifluoromethyl benzene as colorless solid. The product was 41 g (87% yield) and had a melting point of 98.0°~98.6° C.

Workup

customTo a reducing apparatus equipped with a thermometer
temperaturereflux condenser and stirrer
additionwere charged
customthe reaction
filtrationthe catalyst was filtered off
additionmixed with 140 g of water
temperaturecooled to room temperature
filtrationThe precipitated crystals were filtered
customdried under reduced pressure

Sources & evidence

ORD record: ord-2b5df9e1d12c4745939712da39e2d31d
Source dataset: uspto-grants-1995_04
DOI: 10.6084/m9.figshare.5104873.v1
Patent number: US05410084

Reaction notes

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