Diphosgene → 1-(4-Isocyanatophenyl)piperidin-2-one
Reaktionsgleichung
Cl[C:2](OC(Cl)(Cl)Cl)=[O:3].[NH2:9][C:10]1[CH:15]=[CH:14][C:13]([N:16]2[CH2:21][CH2:20][CH2:19][CH2:18][C:17]2=[O:22])=[CH:12][CH:11]=1>C1COCC1>[N:9]([C:10]1[CH:15]=[CH:14][C:13]([N:16]2[CH2:21][CH2:20][CH2:19][CH2:18][C:17]2=[O:22])=[CH:12][CH:11]=1)=[C:2]=[O:3]Komponenten
4
Edukt 2
Produkt 1
Reagenzien, Katalysatoren, Lösungsmittel 1
Versuchsvorschrift
1.2 0.032 ml of trichloromethyl chloroformate is added under a nitrogen atmosphere to a solution of 50 mg of 1-(4-aminophenyl)piperidin-2-one (prepared from 1-(4-nitrophenyl)piperidin-2-one by hydrogenation using Raney nickel as catalyst) in 5 ml of THF, and the mixture is subsequently refluxed for 1.5 hours, giving 1-(4-isocyanatophenyl)piperidin-2-one (“AB”).