Dimethylformamide → 1-(4-methoxybenzyl)-4-(5-chloro-2-fluoro-4-nitrophenoxy)-3-iodo-1H-pyrazolo[3,4-b]pyridine

HRID 2241384Notes

Reaction equation

[Cl:1][C:2]1[CH:7]=[C:6](F)[C:5]([F:9])=[CH:4][C:3]=1[N+:10]([O-:12])=[O:11].[CH3:13][O:14][C:15]1[CH:32]=[CH:31][C:18]([CH2:19][N:20]2[C:24]3[N:25]=[CH:26][CH:27]=[C:28]([OH:29])[C:23]=3[C:22]([I:30])=[N:21]2)=[CH:17][CH:16]=1.C([O-])([O-])=O.[K+].[K+].CN(C=O)C>O>[CH3:13][O:14][C:15]1[CH:16]=[CH:17][C:18]([CH2:19][N:20]2[C:24]3=[N:25][CH:26]=[CH:27][C:28]([O:29][C:6]4[CH:7]=[C:2]([Cl:1])[C:3]([N+:10]([O-:12])=[O:11])=[CH:4][C:5]=4[F:9])=[C:23]3[C:22]([I:30])=[N:21]2)=[CH:31][CH:32]=1

Participants

Conditions

Temperature: 50 °C

Procedure

A mixture of 1-chloro-4,5-difluoro-2-nitrobenzene (2.23 g, 11.5 mmol), 1-(4-methoxybenzyl)-3-iodo-1H-pyrazolo[3,4-b]pyridin-4-ol (4.00 g, 10.5 mmol), K2CO3 (1.60 g, 11.5 mmol) and DMF (100 mL) was heated to 50° C. for 18 hours. The reaction was cooled to ambient temperature, diluted with water (500 mL), extracted with EtOAc, dry over sodium sulfate, filter and concentrate. The residue was purified by flash column chromatography (5% MeOH in CH2Cl2) to provide a light pink solid. The solid was triturated with hot MeOH to afford the product (2.35 g, 40% yield) as a white solid. LRMS (APCI pos) m/e 554.8 (M+H).

Workup

temperatureThe reaction was cooled to ambient temperature
extractionextracted with EtOAc
dry with materialdry over sodium sulfate
filtrationfilter
concentrationconcentrate
customThe residue was purified by flash column chromatography (5% MeOH in CH2Cl2)
customto provide a light pink solid
customThe solid was triturated with hot MeOH

Sources & evidence

ORD record: ord-5d51f60b41bb45beb51b2bd2c94845ed
Source dataset: uspto-grants-2010_05
DOI: 10.6084/m9.figshare.5104873.v1
Patent number: US07723330B2

Reaction notes

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