Potassium Carbonate → ethyl 2-(5-(3-((4-formyl-6-methoxypyridin-3-yloxy)methyl)pyridin-2-yl)-1H-pyrazol-1-yl)acetate

HRID 1471753Notes

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]([CH2:26][C:27]([O:29][CH2:30][CH3:31])=[O:28])[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:8]([C:7]1[CH:6]=[C:5]([O:10][CH3:11])[N:4]=[CH:3][C:2]=1[O:1][CH2:14][C:15]1[C:16]([C:21]2[N:25]([CH2:26][C:27]([O:29][CH2:30][CH3:31])=[O:28])[N:24]=[CH:23][CH:22]=2)=[N:17][CH:18]=[CH:19][CH:20]=1)=[O:9]

Participants

Conditions

Temperature: 70 °C

Procedure

A mixture of 5-hydroxy-2-methoxyisonicotinaldehyde (107 mg, 0.70 mmol, 1 eq.), ethyl 2-(5-(3-(chloromethyl)pyridin-2-yl)-1H-pyrazol-1-yl)acetate hydrochloride (220 mg, 0.70 mmol, 1 eq.), and K2CO3 (386 mg, 2.8 mmol, 4 eq.) in DMF (6.0 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 ethyl 2-(5-(3-((4-formyl-6-methoxypyridin-3-yloxy)methyl)pyridin-2-yl)-1H-pyrazol-1-yl)acetate (261 mg, 94%) as a white solid. 1H NMR (400 MHz, CDCl3) δ 10.45 (s, 1H), 8.69 (d, J=3.8 Hz, 1H), 8.02 (s, 1H), 8.01 (d, J=7.5 Hz, 1H), 7.63 (d, J=1.6 Hz, 1H), 7.40 (dd, J=7.6, 4.0 Hz, 1H), 7.13 (s, 1H), 6.53 (d, J=1.6 Hz, 1H), 5.30 (s, 2H), 5.28 (s, 2H), 4.12 (q, J=7.1 Hz, 2H), 3.93 (s, 3H), 1.18 (t, J=7.1 Hz, 3H). LRMS (M+H+) m/z 397.1.

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-a6a251770a334948bfba9a129d8baa0e
Source dataset: uspto-grants-2015_04
DOI: 10.6084/m9.figshare.5104873.v1
Patent number: US09012450B2

Reaction notes

Loading…