Diisopropylethylamine → N-(5-(2,2-difluoro-6-methylbenzo[d][1,3]dioxol-5-yl)pyridin-2-yl)-2,6-difluorobenzamide

HRID 2272204Notes

Reaction equation

[F:1][C:2]1[CH:10]=[CH:9][CH:8]=[C:7]([F:11])[C:3]=1[C:4](Cl)=[O:5].[F:12][C:13]1([F:30])[O:17][C:16]2[CH:18]=[C:19]([CH3:29])[C:20]([C:22]3[CH:23]=[CH:24][C:25]([NH2:28])=[N:26][CH:27]=3)=[CH:21][C:15]=2[O:14]1.CCN(C(C)C)C(C)C>ClCCl.O1CCCC1.CO.[OH-].[Na+]>[F:30][C:13]1([F:12])[O:17][C:16]2[CH:18]=[C:19]([CH3:29])[C:20]([C:22]3[CH:23]=[CH:24][C:25]([NH:28][C:4](=[O:5])[C:3]4[C:2]([F:1])=[CH:10][CH:9]=[CH:8][C:7]=4[F:11])=[N:26][CH:27]=3)=[CH:21][C:15]=2[O:14]1

Participants

Conditions

Temperature: 60 °C

Procedure

Under an atmosphere of argon, 2,6-difluorobenzoyl chloride (32 mg, 0.2 mmol) was added to a stirred solution of 4 (24 mg, 0.1 mmol) and Hünig's base (95 μL, 70 mg, 0.5 mmol) in dichloromethane (1.0 mL) at room temperature. The reaction was stirred for 0.5 h. The solution was diluted with tetrahydrofuran (0.6 mL), methanol (0.4 mL) and 2 M sodium hydroxide solution (0.2 mL). The mixture was stirred and heated to 60° C. for 15 min then cooled to room temperature, diluted with dichloromethane (5 mL), dried with sodium sulfate and concentrated under reduced pressure. Flash chromatography (ISCO system, silica, 0-25% ethyl acetate in hexane) provided 5 (27.8 mg, 76%) as a solid: LRESIMS m/z 405.1 [M+H]+, calcd. for C20H13F4N2O3 405.1.

Workup

stirringThe mixture was stirred
temperaturethen cooled to room temperature
dry with materialdried with sodium sulfate
concentrationconcentrated under reduced pressure

Sources & evidence

ORD record: ord-fde0d6e1473e469a9d2898004c6f2fd2
Source dataset: uspto-grants-2015_09
DOI: 10.6084/m9.figshare.5104873.v1
Patent number: US09120751B2

Reaction notes

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