Triphenylphosphine → Methyl 4-[1-(4-pyridyl)piperidin-4-yl]oxyphenoxyacetate

HRID 2226

Reaktionsgleichung

CCOC(/N=N/C(OCC)=O)=O.[N:13]1[CH:18]=[CH:17][C:16]([N:19]2[CH2:24][CH2:23][CH:22]([OH:25])[CH2:21][CH2:20]2)=[CH:15][CH:14]=1.O[C:27]1[CH:38]=[CH:37][C:30]([O:31][CH2:32][C:33]([O:35][CH3:36])=[O:34])=[CH:29][CH:28]=1.C1(P(C2C=CC=CC=2)C2C=CC=CC=2)C=CC=CC=1>C1COCC1>[N:13]1[CH:18]=[CH:17][C:16]([N:19]2[CH2:24][CH2:23][CH:22]([O:25][C:27]3[CH:38]=[CH:37][C:30]([O:31][CH2:32][C:33]([O:35][CH3:36])=[O:34])=[CH:29][CH:28]=3)[CH2:21][CH2:20]2)=[CH:15][CH:14]=1

Komponenten

Reaktionsbedingungen

Temperatur: 4 °C

Versuchsvorschrift

Diethylazodicarboxylate (0.47 ml) was added dropwise over 30 minutes to a stirred mixture of 1-(4-pyridyl)-4-piperidinol (534 mg), methyl 4-hydroxyphenoxyacetate (546 mg), triphenylphosphine (787 mg) and dry THF (30 ml) in an atmosphere of argon and cooled to 4° C. After 1 hour at 4° C., the mixture was allowed to reach ambient temperature and stirred for 48 hours. The solvent was removed by evaporation and the residue purified by flash chromatography on silica eluting with 5% v/v methanol/dichloromethane. Recrystallisation from ethyl acetate/hexane gave the title compound, 532 mg, as a white solid: m.p. 74°-76° C.; NMR (d6DMSO) δ 8.15(2H, bd), 6.89(6H, m), 4.71(2H, s), 4.50(1H, m), 3.70(2H, m), 3.69(3H, s), 3.23(2H, m), 1.96(2H, m), 1.62(2H, m); m/e 343 (M+H)+ ; calculated for C19H22N2O4 : C, 66.7; H, 6.5; N, 8.2. found: C, 66.2; H, 6.7; N, 8.2%.

Aufarbeitung

customto reach ambient temperature
customThe solvent was removed by evaporation
customthe residue purified by flash chromatography on silica eluting with 5% v/v methanol/dichloromethane
customRecrystallisation from ethyl acetate/hexane

Quellen und Nachweise

ORD-Eintrag: ord-0b7d284c41804ff1aae25f00491e423c
Quelldatensatz: uspto-grants-1998_03
DOI: 10.6084/m9.figshare.5104873.v1
Patentnummer: US05728701

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