Ethyl Acetate → N-(2,2,2-Trichloroethoxycarbonyloxy)succinimide

Reaktionsgleichung

[OH:1][N:2]1[C:6](=[O:7])[CH2:5][CH2:4][C:3]1=[O:8].C(OCC)(=O)C.[Cl:15][C:16]([Cl:23])([Cl:22])[CH2:17][O:18][C:19](Cl)=[O:20]>N1C=CC=CC=1>[Cl:15][C:16]([Cl:23])([Cl:22])[CH2:17][O:18][C:19]([O:1][N:2]1[C:6](=[O:7])[CH2:5][CH2:4][C:3]1=[O:8])=[O:20]

Komponenten

Versuchsvorschrift

Dissolve 5.75 gm. of N-hydroxysuccinimide in 200 ml. ethyl acetate and 4 gm. of pyridine; cool the resultant solution to 0° C. To this solution add 10.6 gm. 2,2,2-trichloroethylchloroformate dropwise over a period of 1.5 hours. Filter the resultant mixture and evaporate the filtrate to dryness. Wash the thereby formed needles with hexane to obtain N-(2,2,2-trichloroethoxycarbonyloxy) succinimide, mp. 98°-101° C; νmax (CHCl3) 1825, 1790, 1750, 1185, 826 cm.-1, δ(CDCl3) 2.85 (4H,s,--CO (CH2)2CO--) and 4.90 ppm. (2H,s,--COOCH2CCl3).