Potassium Carbonate → 5-((2-(1-isopropyl-1H-pyrazol-5-yl)pyridin-3-yl)methoxy)-2-methoxyisonicotinaldehyde

HRID 1770788Notes

Reaction equation

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

Participants

Conditions

Temperature: 70 °C

Procedure

A mixture of 5-hydroxy-2-methoxyisonicotinaldehyde (395 mg, 2.58 mmol, 1 eq.), 3-(chloromethyl)-2-(1-isopropyl-1H-pyrazol-5-yl)pyridine hydrochloride (700 mg, 2.58 mmol, 1 eq.), and K2CO3 (1.4 g, 10.32 mmol, 4 eq.) in DMF (10.0 mL) was heated at 70° C. for 2 h. The mixture was cooled, filtered, concentrated, and purified on silica gel using a mixture of EtOAc and hexanes as eluent to give 5-((2-(1-isopropyl-1H-pyrazol-5-yl)pyridin-3-yl)methoxy)-2-methoxyisonicotinaldehyde (590 mg, 65%) as an off-white solid. 1H NMR (400 MHz, CDCl3) δ 10.41 (s, 1H), 8.76 (dd, J=4.7, 1.6 Hz, 1H), 8.04 (dd, J=7.9, 1.6 Hz, 1H), 7.90 (s, 1H), 7.61 (d, J=1.8 Hz, 1H), 7.44 (dd, J=7.9, 4.8 Hz, 1H), 7.10 (s, 1H), 6.37 (d, J=1.8 Hz, 1H), 5.14 (s, 2H), 4.65 (sep, J=6.6 Hz, 1H), 3.91 (s, 3H), 1.49 (d, J=6.6 Hz, 6H); MS (ESI) m/z 353.1 [M+H]+.

Workup

temperatureThe mixture was cooled
filtrationfiltered
concentrationconcentrated
custompurified on silica gel using
additiona mixture of EtOAc and hexanes as eluent

Sources & evidence

ORD record: ord-c0e5de95188740d6a1710f10bc212316
Source dataset: uspto-grants-2016_02
DOI: 10.6084/m9.figshare.5104873.v1
Patent number: US09248199B2

Reaction notes

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