Diethyl Ether → 4-(2,3-Dimethoxyphenyl)-4-piperidinylmethanone trifluoroacetate

Reaktionsgleichung

CC(OC([N:8]1[CH2:13][CH2:12][CH:11]([C:14](=O)[C:15]2[CH:20]=[CH:19][CH:18]=[C:17]([O:21][CH3:22])C=2OC)[CH2:10][CH2:9]1)=O)(C)C.[F:26][C:27]([F:32])([F:31])[C:28]([OH:30])=[O:29].C[CH2:34][O:35]CC>>[F:26][C:27]([F:32])([F:31])[C:28]([OH:30])=[O:29].[CH3:22][O:21][C:17]1[C:18]([O:35][CH3:34])=[CH:19][CH:20]=[CH:15][C:14]=1[C:11]1([CH:28]=[O:30])[CH2:10][CH2:9][NH:8][CH2:13][CH2:12]1

Komponenten

Edukt 3

HCID 3283Diethyl Ether

HCID 6422Trifluoroacetic acid

HCID 46780868N-Boc-(2,3-dimethoxyphenyl)-4-piperidinylmethanone

Produkt 1

HCID 218981094-(2,3-Dimethoxyphenyl)-4-piperidinylmethanone trifluoroacetate

Versuchsvorschrift

4-(2,3-Dimethoxybenzoyl)-1-piperidinecarboxylic acid 1,1-dimethylethyl ester (7.75 g, 22.2 mmol) was dissolved in trifluoroacetic acid (50 mL, 650 mmol) and stirred for 45 minutes. The entire solution was poured into ether (900 mL) and allowed to stand overnight. Filtration yielded 4-(2,3-dimethoxyphenyl)-4-piperidinylmethanone trifluoroacetate as fine white needles, m.p. 123° C. Anal. Calcd for C14H19NO3 ·CF3CO2H: C, 52.89; H, 5.55; N, 3.86. Found: C, 52.77; H, 5.62; N, 3.82.