Reaktion #347596

Reaktionsgleichung

ethanol

Hydrogen

4,4'-dinitrobiphenyl

polysiloxane

hydrogen

→

4,4'-diaminobiphenyl

Ausbeute 123.9%

Lösungsmittel

—

same mixed solvent

benzene

Reaktionsbedingungen

Aufarbeitung

1. 1
   workup.ADDITIONa solution was added
2. 2
   Sonstigesynthesized in Reference Example 2
3. 3
   FiltrationThe catalyst was then filtered off
4. 4
   workup.DISTILLATIONthe solvent was distilled under reduced pressure

Vorschrift

270 mg of 5%-Pd/C was suspended in 14 mL of a 1:1 mixed solvent of ethanol and benzene. While passing hydrogen through the system, a solution was added that consisted of 3.21 g of the 4,4'-dinitrobiphenyl-containing polysiloxane (average value of n: 14.4) synthesized in Reference Example 2 dissolved in 14 mL of the same mixed solvent. Hydrogen was injected into the system for 3 hours while stirring. The catalyst was then filtered off and the solvent was distilled under reduced pressure to give 3.00 g of the 4,4'-diaminobiphenyl-terminated polysiloxane as a viscous yellow liquid.

Quelle