Reaktion #217144

Reaktionsgleichung

acetonitrile

trifluoroacetic acid

bis(1,2,2,6,6-pentamethylpiperidin-4-yl) hydrazine-1,2-dicarboxylate

iodobenzene diacetate

→

title compound

Ausbeute 23.4%

Bis(1,2,2,6,6-pentamethylpiperidin-4-yl) Azodicarboxylate

Ausbeute 23.4%

Lösungsmittel

methylene chloride

Reaktionsbedingungen

Aufarbeitung

1. 1
   Sonstigeat 0°-5° C.
2. 2
   Waschenthe reaction mixture is washed with saturated sodium bicarbonate solution
3. 3
   Trocknenwith brine, and dried over anhydrous magnesium sulfate
4. 4
   SonstigeThe dried solution is evaporated
5. 5
   Sonstigeto afford a pale yellow oil

Vorschrift

To a solution of 30.0 g bis(1,2,2,6,6-pentamethylpiperidin-4-yl) hydrazine-1,2-dicarboxylate in 60 mL of methylene chloride is added 16.0 g (10.8 mL), of trifluoroacetic acid at 0°-5° C., followed the addition of 22.6 g of iodobenzene diacetate at room temperature. After stirring at room temperature for 2.5 hours, the reaction mixture is washed with saturated sodium bicarbonate solution and then with brine, and dried over anhydrous magnesium sulfate. The dried solution is evaporated to afford a pale yellow oil. Trituration with acetonitrile affords 7.0 g of the title compound as a pale yellow solid; mp 135°-137° C. NMR and IR analyses are consistent with the desired structure.

Quelle