Sodium Carbonate → tert-Butyl 4-(4-fluoro-5-nitro-2-vinylbenzamido)piperidine-1-carboxylate

HRID 2093797

Reaktionsgleichung

Cl[C:2]1[CH:23]=[C:22]([F:24])[C:21]([N+:25]([O-:27])=[O:26])=[CH:20][C:3]=1[C:4]([NH:6][CH:7]1[CH2:12][CH2:11][N:10]([C:13]([O:15][C:16]([CH3:19])([CH3:18])[CH3:17])=[O:14])[CH2:9][CH2:8]1)=[O:5].[CH2:28](OB(C=C)OCCCC)[CH2:29]CC.C(=O)([O-])[O-].[Na+].[Na+]>C1COCC1.O.Cl[Pd](Cl)([P](C1C=CC=CC=1)(C1C=CC=CC=1)C1C=CC=CC=1)[P](C1C=CC=CC=1)(C1C=CC=CC=1)C1C=CC=CC=1>[F:24][C:22]1[C:21]([N+:25]([O-:27])=[O:26])=[CH:20][C:3]([C:4]([NH:6][CH:7]2[CH2:12][CH2:11][N:10]([C:13]([O:15][C:16]([CH3:19])([CH3:18])[CH3:17])=[O:14])[CH2:9][CH2:8]2)=[O:5])=[C:2]([CH:28]=[CH2:29])[CH:23]=1

Komponenten

Reaktionsbedingungen

Temperatur: 90 °C

Versuchsvorschrift

Under nitrogen, the mixture of tert-butyl 4-(2-chloro-4-fluoro-5-nitrobenzamido)piperidine-1-carboxylate (Step 1, 1.52 g, 3.88 mmol), vinylboronic acid dibutyl ester (0.86 mL, 3.88 mmol), dichlorobis(triphenylphosphine)palladium (II) (136 mg, 0.2 mmol) and sodium carbonate (2.9 g, 27.2 mmol) in THF (40 mL) and water (10 mL) was heated at 90° C. overnight. The reaction mixture was cooled to room temperature, partitioned between EtOAc and brine. The organic extracts were dried (Na2SO4), concentrated, and purified by silica gel chromatography (EtOAc/Hexanes:1/4) to afford tert-Butyl 4-(4-fluoro-5-nitro-2-vinylbenzamido)piperidine-1-carboxylate; ESMS m/z 394.2 (M+H+).

Aufarbeitung

temperatureThe reaction mixture was cooled to room temperature
custompartitioned between EtOAc and brine
dry with materialThe organic extracts were dried (Na2SO4)
concentrationconcentrated
custompurified by silica gel chromatography (EtOAc/Hexanes:1/4)

Quellen und Nachweise

ORD-Eintrag: ord-0b1f7f5a13934239807174631747a0f5
Quelldatensatz: uspto-grants-2013_05
DOI: 10.6084/m9.figshare.5104873.v1
Patentnummer: US08445505B2

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