Water → 5-Cyclopropyl-6-(1-hydroxy-1,3-dihydrobenzo[c][1,2]oxaborol-5-yloxy)-2-(4-oxopentyloxy)nicotinonitrile

HRID 1020821

Reaktionsgleichung

Cl[C:2]1[C:9]([CH:10]2[CH2:12][CH2:11]2)=[CH:8][C:5]([C:6]#[N:7])=[C:4]([O:13][CH2:14][CH2:15][CH2:16][C:17](=[O:19])[CH3:18])[N:3]=1.[B:20]1([OH:30])[C:24]2[CH:25]=[CH:26][C:27]([OH:29])=[CH:28][C:23]=2[CH2:22][O:21]1.C([O-])([O-])=O.[Cs+].[Cs+].O>CS(C)=O>[CH:10]1([C:9]2[C:2]([O:29][C:27]3[CH:26]=[CH:25][C:24]4[B:20]([OH:30])[O:21][CH2:22][C:23]=4[CH:28]=3)=[N:3][C:4]([O:13][CH2:14][CH2:15][CH2:16][C:17](=[O:19])[CH3:18])=[C:5]([CH:8]=2)[C:6]#[N:7])[CH2:12][CH2:11]1

Komponenten

Reaktionsbedingungen

Temperatur: 40 °C

Versuchsvorschrift

A mixture of 6-chloro-5-cyclopropyl-2-(4-oxopentyloxy)nicotinonitrile (360 mg, 1.29 mmol), compound benzo[c][1,2]oxaborole-1,5(3H)-diol (232 mg, 1.55 mmol) and Cs2CO3 (505 mg, 1.55 mmol) in DMSO (20 mL) was stirred at 40° C. overnight. The mixture was diluted by water, extracted by EtOAc, the separated organic layer was concentrated in vacuo and the residue was purified by column chromatography (Petroleum ether:EtOAc=10:1˜3:1) to afford 5-cyclopropyl-6-(1-hydroxy-1,3-dihydrobenzo[c][1,2]oxaborol-5-yloxy)-2-(4-oxopentyloxy)nicotinonitrile. (200 mg, 40%). 1H-NMR (400 MHz, DMSO-d6) δ (ppm) 9.20 (s, 1H), 7.86 (s, 1H), 7.75 (d, J=8.0, 1H), 7.24 (d, J=2.0, 1H), 7.16 (dd, J=8.0, 2.0, 1H), 4.97 (s, 2H), 3.94 (t, J=7.8, 2H), 3.29 (t, J=7.8, 2H), 2.02 (m, 4H), 1.65 (t, J=7.8, 2H), 0.92 (m, 2H), 0.77 (m, 2H).

Aufarbeitung

extractionextracted by EtOAc
concentrationthe separated organic layer was concentrated in vacuo
customthe residue was purified by column chromatography (Petroleum ether:EtOAc=10:1˜3:1)

Quellen und Nachweise

ORD-Eintrag: ord-857a57b80c944aacbcb62f82c18ab102
Quelldatensatz: uspto-grants-2014_05
DOI: 10.6084/m9.figshare.5104873.v1
Patentnummer: US08716478B2

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