Dimethylformamide → 3-((4-Formyl-6-methoxypyridin-3-yloxy)methyl)picolinonitrile

HRID 1471694Notes

Reaction equation

Br[C:2]1[C:7]([CH2:8][O:9][C:10]2[C:15]([CH:16]=[O:17])=[CH:14][C:13]([O:18][CH3:19])=[N:12][CH:11]=2)=[CH:6][CH:5]=[CH:4][N:3]=1.[CH3:20][N:21](C=O)C>C1C=CC([P]([Pd]([P](C2C=CC=CC=2)(C2C=CC=CC=2)C2C=CC=CC=2)([P](C2C=CC=CC=2)(C2C=CC=CC=2)C2C=CC=CC=2)[P](C2C=CC=CC=2)(C2C=CC=CC=2)C2C=CC=CC=2)(C2C=CC=CC=2)C2C=CC=CC=2)=CC=1>[CH:16]([C:15]1[CH:14]=[C:13]([O:18][CH3:19])[N:12]=[CH:11][C:10]=1[O:9][CH2:8][C:7]1[C:2]([C:20]#[N:21])=[N:3][CH:4]=[CH:5][CH:6]=1)=[O:17]

Participants

Conditions

Temperature: 125 °C

Procedure

To a mixture of 5-((2-bromopyridin-3-yl)methoxy)-2-methoxyisonicotinaldehyde (100 mg, 0.31 mmol, 1 equiv), Zn (CN)2 (71 mg, 0.62 mmol, 2.0 equiv), Pd(PPh3)4 (72 mg, 0.06 mmol, 0.2 equiv) in a 5 mL microwave tube was added DMF (2 mL). The mixture was heated 15 min at 125° C. in a microwave reactor. The solid was filtered off and the filtrate was concentrated to dryness. The crude was purified on silica gel using a mixture of EtOAc and hexanes as eluent to give 3-((4-formyl-6-methoxypyridin-3-yloxy)methyl)picolinonitrile (71 mg, 84%) as a white solid. 1H NMR (400 MHz; CDCl3) δ=10.54 (s, 1H), 8.86 (d, 1H), 8.22 (s, 1H), 8.20 (d, 1H), 7.74 (dd, 1H), 6.37 (s, 1H) 5.52 (s, 2H), 4.04 (s, 3H). LRMS (M+H+) m/z 270.1.

Workup

filtrationThe solid was filtered off
concentrationthe filtrate was concentrated to dryness
customThe crude was purified on silica gel using
additiona mixture of EtOAc and hexanes as eluent

Sources & evidence

ORD record: ord-3bbeaeeeb7e44a2e81676ed8a2c1797b
Source dataset: uspto-grants-2015_04
DOI: 10.6084/m9.figshare.5104873.v1
Patent number: US09012450B2

Reaction notes

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