Potassium Carbonate → HCID 86625871, Verbindung

HRID 1485579

Reaktionsgleichung

[NH:1]1[CH2:6][CH2:5][CH:4]([NH:7][C:8](=[O:14])[O:9][C:10]([CH3:13])([CH3:12])[CH3:11])[CH2:3][CH2:2]1.Br[C:16]1[N:17]=[N:18][CH:19]=[CH:20][CH:21]=1.[F-].[Cs+].C([O-])([O-])=O.[K+].[K+]>CS(C)=O.C(Cl)Cl.O>[N:17]1[CH:16]=[CH:21][CH:20]=[C:19]([N:1]2[CH2:2][CH2:3][CH:4]([NH:7][C:8](=[O:14])[O:9][C:10]([CH3:11])([CH3:13])[CH3:12])[CH2:5][CH2:6]2)[N:18]=1

Komponenten

Reaktionsbedingungen

Temperatur: 100 °C

Versuchsvorschrift

The reaction mixture of tert-butyl piperidin-4-ylcarbamate (250 mg, 1.25 mmol), 3-bromopyridazine (258 mg, 1.62 mmol), CsF (37.9 mg, 0.25 mmol), and K2CO3 (518 mg, 3.74 mmol) in DMSO (12.5 mL) was heated at 100° C. for 20 h. Water and DCM were poured into the mixture, and the separated aqueous layer was extracted with DCM, the combined organic layers were dried over Na2SO4, filtered, concentrated in vacuo. The residue was purified by column chromatography (Hexane:EtOAc=1:1) to give tert-butyl 1-(pyridazine-3-yl)piperidin-4-ylcarbamate (123 mg, 35%) as a pale yellow solid. 1H-NMR (CDCl3, Varian 400 MHz) δ 1.45 (9H, s), 1.92-2.12 (2H, m), 3.03-3.17 (2H, m), 3.55-3.80 (2H, m), 4.25-4.38 (2H, m), 4.52 (1H, brs), 6.92 (1H, d, J=9.2 Hz), 7.20 (1H, dd, J=4.4, 9.2 Hz), 8.56 (1H, d, J=4.4 Hz). NH peak was not observed. m/z=279.06 [M+1]+.

Aufarbeitung

extractionthe separated aqueous layer was extracted with DCM
dry with materialthe combined organic layers were dried over Na2SO4
filtrationfiltered
concentrationconcentrated in vacuo
customThe residue was purified by column chromatography (Hexane:EtOAc=1:1)

Quellen und Nachweise

ORD-Eintrag: ord-23525637b4f04fb6a18f2c15dd65498f
Quelldatensatz: uspto-grants-2016_08
DOI: 10.6084/m9.figshare.5104873.v1
Patentnummer: US09422298B2

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