Sulfuric Acid → 4-(Phenyl-2-pyridylmethoxy)-1-[3-(2-nitrophenoxy)propyl]piperidine

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Reaktionsgleichung

[C:1]1([CH:7]([C:9]2[CH:14]=[CH:13][CH:12]=[CH:11][N:10]=2)[OH:8])[CH:6]=[CH:5][CH:4]=[CH:3][CH:2]=1.O[CH:16]1[CH2:21][CH2:20][N:19]([CH2:22][CH2:23][CH2:24][O:25][C:26]2[CH:31]=[CH:30][CH:29]=[CH:28][C:27]=2[N+:32]([O-:34])=[O:33])[CH2:18][CH2:17]1.S(=O)(=O)(O)O.[OH-].[Na+]>C1(C)C=CC=CC=1>[C:1]1([CH:7]([C:9]2[CH:14]=[CH:13][CH:12]=[CH:11][N:10]=2)[O:8][CH:16]2[CH2:17][CH2:18][N:19]([CH2:22][CH2:23][CH2:24][O:25][C:26]3[CH:31]=[CH:30][CH:29]=[CH:28][C:27]=3[N+:32]([O-:34])=[O:33])[CH2:20][CH2:21]2)[CH:2]=[CH:3][CH:4]=[CH:5][CH:6]=1

Komponenten

Reaktionsbedingungen

Temperatur: 120 °C

Versuchsvorschrift

There was stirred at 120° C. for 4 hours a mixture of 6.74 g of phenyl-2-pyridylmethanol, 7.85 g of 4-hydroxy-1-[3-(2-nitrophenoxy)propyl]piperidine, 11.0 g of concentrated sulfuric acid and 15 ml of toluene. After cooling, the reaction solution was poured into ice water, made alkaline with an aqueous sodium hydroxide, and extracted with toluene. The extract was washed with water, and toluene was removed under reduced pressure. The residue was eluted with ethyl acetate-ethanol-dichloromethane (1:1:1) by silica gel column chromatography to give 3.67 g of oily 4-(phenyl-2-pyridylmethoxy)-1-[3-(2-nitrophenoxy)propyl]piperidine.

Aufarbeitung

temperatureAfter cooling
extractionextracted with toluene
washThe extract was washed with water, and toluene
customwas removed under reduced pressure
washThe residue was eluted with ethyl acetate-ethanol-dichloromethane (1:1:1) by silica gel column chromatography

Quellen und Nachweise

ORD-Eintrag: ord-5c072b6699774af5b33fab6be2d33b39
Quelldatensatz: uspto-grants-1993_03
DOI: 10.6084/m9.figshare.5104873.v1
Patentnummer: US05190959

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