2-Hexenoic acid, (2E)- → HCID 178445511, Verbindung

HRID 635136

Reaktionsgleichung

[C:1]([OH:8])(=[O:7])/[CH:2]=[CH:3]/[CH2:4][CH2:5][CH3:6].O[C@H:10]1[CH2:15][CH2:14][C@H:13]([C:16]2[CH:21]=[CH:20][C:19]([C:22]34[CH2:29][CH2:28][C:25]([CH2:30][CH2:31][CH2:32][CH2:33][CH3:34])([CH2:26][CH2:27]3)[CH2:24][CH2:23]4)=[CH:18][CH:17]=2)[CH2:12][CH2:11]1>ClCCl.CN(C)C1C=CN=CC=1>[C:1]([O:8][C@H:10]1[CH2:15][CH2:14][C@H:13]([C:16]2[CH:17]=[CH:18][C:19]([C:22]34[CH2:27][CH2:26][C:25]([CH2:30][CH2:31][CH2:32][CH2:33][CH3:34])([CH2:24][CH2:23]3)[CH2:28][CH2:29]4)=[CH:20][CH:21]=2)[CH2:12][CH2:11]1)(=[O:7])/[CH:2]=[CH:3]/[CH2:4][CH2:5][CH3:6]

Komponenten

Reaktionsbedingungen

Temperatur: 0 °C

Versuchsvorschrift

A solution of N,N-dicyclohexylcarbodiimide (0.22 g, 1.1 mmol) in dichloromethane (10 cm3) is added to a solution of (E)-hex-2-enoic acid (0.10 g, 0.9 mmol), 1-[4-(trans-4-hydroxycyclohexyl) phenyl]-4-pentylbicyclo[2.2.2]octane (0.32 g, 0.9 mmol), 4-(dimethylamino) pyridine (0.04 g) in dichloromethane (20 cm3), cooled in an ice bath (0° C.) under an atmosphere of nitrogen. The reaction mixture is stirred overnight, filtered to remove precipitated material and the filtrate is evaporated down under reduced pressure. The crude product is purified by column chromatography on silica gel using a 9:1 petroleum ether (40-60° C.)/ethyl acetate mixture as eluent, followed by recrystallization from ethanol to yield the desired ester (0.26 g, 64%).

Aufarbeitung

filtrationfiltered
customto remove
customprecipitated material
customthe filtrate is evaporated down under reduced pressure
customThe crude product is purified by column chromatography on silica gel using a 9:1 petroleum ether (40-60° C.)/ethyl acetate mixture as eluent
customfollowed by recrystallization from ethanol

Quellen und Nachweise

ORD-Eintrag: ord-4d60b3901e6844b7b4c3aa10eee24ce8
Quelldatensatz: uspto-grants-2001_02
DOI: 10.6084/m9.figshare.5104873.v1
Patentnummer: US06187393B1

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