Reaktion #84587

Reaktionsgleichung

Et3N

water

hydrochloric acid

2-chloro-N-(1-(4-chloro-3-fluorophenyl)-2-methylpropan-2-yl)-4-nitroaniline

→

crude product

2-chloro-N1-(1-(4-chloro-3-fluorophenyl)-2-methylpropan-2-yl)benzene-1,4-diamine

Lösungsmittel

MeOH

Reaktionsbedingungen

Aufarbeitung

1. 1
   workup.ADDITIONThe aqueous layer of the mixture was poured out
2. 2
   workup.STIRRINGstirred at 65° C. for 20 min
3. 3
   Filtrationfiltered
4. 4
   Einengenthe filtrate was concentrated in vacuo
5. 5
   workup.DISSOLUTIONThe residue was dissolved in EtOAc (100 mL)
6. 6
   Waschenthe solution was washed with water (30 mL×3) and brine (30 mL×2)
7. 7
   Trocknendried over anhydrous Na2SO4 (10 g)
8. 8
   Einengenconcentrated in vacuo

Vorschrift

To a mixture of water (20 mL) and iron powder (697 mg, 12.50 mmol) at 65° C. was added concentrated hydrochloric acid (0.2 mL) dropwise and the mixture was stirred for 15 min. The aqueous layer of the mixture was poured out and a solution of 2-chloro-N-(1-(4-chloro-3-fluorophenyl)-2-methylpropan-2-yl)-4-nitroaniline (446 mg, 1.25 mmol) in MeOH (20 mL) was added to the above processed iron powder. The mixture was adjusted to pH 2-3 and stirred at 65° C. for 20 min. The mixture was then cooled to rt, adjusted to pH 11 with Et3N, and filtered and the filtrate was concentrated in vacuo. The residue was dissolved in EtOAc (100 mL) and the solution was washed with water (30 mL×3) and brine (30 mL×2), dried over anhydrous Na2SO4 (10 g) and concentrated in vacuo to give the crude product, which was used for next step with out further purification. The compound was characterized by the following spectroscopic data:

Quelle