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

HRID 2284508Notes

Reaction equation

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][O:16][CH:17]([CH3:19])[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][O:16][CH:17]([CH3:19])[CH3:18])=[C:5]([CH:8]=2)[C:6]#[N:7])[CH2:12][CH2:11]1

Participants

Conditions

Temperature: 40 °C

Procedure

A mixture of 6-chloro-5-cyclopropyl-2-(2-isopropoxyethoxy)nicotinonitrile (150 mg, 0.53 mmol), benzo[c][1,2]oxaborole-1,5(3H)-diol (84 mg, 0.56 mmol) and Cs2CO3 (209 mg, 0.64 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˜1:1) to afford 5-cyclopropyl-6-(1-hydroxy-1,3-dihydrobenzo[c][1,2]oxaborol-5-yloxy)-2-(2-isopropoxyethoxy)nicotinonitrile. (120 mg, 57%). 1H-NMR (400 MHz, DMSO-d6) δ (ppm) 9.18 (s, 1H), 7.86 (s, 1H), 7.76 (d, J=8.0, 1H), 7.24 (d, J=2.0, 1H), 7.16 (dd, J=8.0, 2.0, 1H), 4.96 (s, 2H), 4.04 (m, 2H), 3.42 (m, 2H), 2.05 (m, 2H), 0.97 (d, J=6.0, 6H), 0.92 (m, 2H), 0.77 (m, 2H).

Workup

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

Sources & evidence

ORD record: ord-faf49017ee1a4a5e911a6b931879a093
Source dataset: uspto-grants-2015_09
DOI: 10.6084/m9.figshare.5104873.v1
Patent number: US09145429B2

Reaction notes

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