Water → HCID 89704786, compound

HRID 928949Notes

Reaction equation

[CH2:1]([O:8][C:9]1[C:10](F)=[C:11]([F:33])[C:12]([NH:25][C:26]2[CH:31]=[CH:30][CH:29]=[CH:28][C:27]=2[F:32])=[C:13]([CH:24]=1)[C:14]([O:16][CH2:17][C:18]1[CH:23]=[CH:22][CH:21]=[CH:20][CH:19]=1)=[O:15])[C:2]1[CH:7]=[CH:6][CH:5]=[CH:4][CH:3]=1.[N-:35]=[N+:36]=[N-:37].[Na+].O>CN(C=O)C>[N:35]([C:10]1[C:9]([O:8][CH2:1][C:2]2[CH:7]=[CH:6][CH:5]=[CH:4][CH:3]=2)=[CH:24][C:13]([C:14]([O:16][CH2:17][C:18]2[CH:23]=[CH:22][CH:21]=[CH:20][CH:19]=2)=[O:15])=[C:12]([NH:25][C:26]2[CH:31]=[CH:30][CH:29]=[CH:28][C:27]=2[F:32])[C:11]=1[F:33])=[N+:36]=[N-:37]

Participants

Conditions

Temperature: 90 °C

Procedure

To a solution of benzyl 5-benzyloxy-3,4-difluoro-2-((2-fluoro-phenyl)amino)benzoate (21.42 g, 46.22 mmol) in DMF (150 mL) was added NaN3 (3.61 g, 55.46 mmol). The mixture was stirred at 90° C. for 3 h. Then water (300 mL) was added. The solution was extracted with ethyl acetate (100 mL×3). The combined organic extracts were washed with water (100 mL) and brine (100 mL), dried over Na2SO4 and concentrated in vacuo. The residue was purified by flash column chromatography on silica gel (petroleum ether/ethyl acetate, 50:1, v/v) and gave the desired product (pale yellow solid, 14.63 g, 65% yield). 1H NMR (400 MHz, CDCl3): δ 8.45 (s, 1H), 7.49 (s, 1H), 7.39 (m, 10H), 7.07 (m, 1H), 7.04 (m, 1H), 6.90 (m, 1H), 6.83 (m, 1H), 5.31 (s, 2H), 5.13 (s, 2H).

Workup

extractionThe solution was extracted with ethyl acetate (100 mL×3)
washThe combined organic extracts were washed with water (100 mL) and brine (100 mL)
dry with materialdried over Na2SO4
concentrationconcentrated in vacuo
customThe residue was purified by flash column chromatography on silica gel (petroleum ether/ethyl acetate, 50:1

Sources & evidence

ORD record: ord-aa5a497fa1c041569a85f1795240dbc6
Source dataset: uspto-grants-2016_03
DOI: 10.6084/m9.figshare.5104873.v1
Patent number: US09290468B2

Reaction notes

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