4-Toluenesulfonyl chloride → N-(3-((3-bromopyridin-2-yl)oxy)cyclobutyl)-4-methylbenzenesulfonamide

HRID 1846820Notes

Reaction equation

Cl.[Br:2][C:3]1[C:4]([O:9][CH:10]2[CH2:13][CH:12]([NH2:14])[CH2:11]2)=[N:5][CH:6]=[CH:7][CH:8]=1.CCN(CC)CC.[C:22]1([CH3:32])[CH:27]=[CH:26][C:25]([S:28](Cl)(=[O:30])=[O:29])=[CH:24][CH:23]=1>C(Cl)Cl>[Br:2][C:3]1[C:4]([O:9][CH:10]2[CH2:11][CH:12]([NH:14][S:28]([C:25]3[CH:26]=[CH:27][C:22]([CH3:32])=[CH:23][CH:24]=3)(=[O:30])=[O:29])[CH2:13]2)=[N:5][CH:6]=[CH:7][CH:8]=1

Participants

Conditions

Temperature: 0 °C

Procedure

To a solution of 3-((3-bromopyridin-2-yl)oxy)cyclobutanamine hydrochloride (243 mg, 1 mmol) in dry DCM (10 mL) was added Et3N (1 mL). The reaction mixture was cooled to 0° C. with an ice bath, and p-toluenesulfonyl chloride (380 mg, 2 mmol) was added dropwise. After 1 hour, the reaction mixture was warmed to room temperature, and stirred overnight. Then the reaction mixture was washed with brine, dried over Na2SO4, filtered, and concentrated under vacuum to give the crude product. The crude product was purified by flash chromatography on silica gel (20% to 45% EtOAc in petroleum ether) to give N-(3-((3-bromopyridin-2-yl)oxy)cyclobutyl)-4-methylbenzenesulfonamide (318 mg, 0.8 mmol, yield 80%). ESI-MS (M+1): 397 calc. for C16H17BrN2O3S 396.

Workup

temperaturethe reaction mixture was warmed to room temperature
washThen the reaction mixture was washed with brine
dry with materialdried over Na2SO4
filtrationfiltered
concentrationconcentrated under vacuum
customto give the crude product
customThe crude product was purified by flash chromatography on silica gel (20% to 45% EtOAc in petroleum ether)

Sources & evidence

ORD record: ord-053c23eb0d5049eaab7e5ff52856f1e7
Source dataset: uspto-grants-2015_02
DOI: 10.6084/m9.figshare.5104873.v1
Patent number: US08952037B2

Reaction notes

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