Water → Tert-butyl 2-[(2,3-dimethyl-5-nitro-6-phenoxypyridin-4-yl)amino]ethylcarbamate

HRID 1070802Notes

Reaction equation

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

Participants

Conditions

Temperature: 90 °C

Procedure

Phenol (1.19 g, 12.6 mmol) was added in portions to a chilled (0° C.) suspension of sodium hydride (0.52 g of 60%, 13.1 mmol) in diglyme (4 mL). The reaction mixture was then stirred for 30 minutes. A warm solution of tert-butyl 2-[(2-chloro-5,6-dimethyl-3-nitropyridin-4-yl)amino]ethylcarbamate (3.0 g, 8.70 mmol) in diglyme (6 mL) was added and the reaction mixture was heated at 90° C. overnight. The reaction mixture was cooled and poured slowly into water (100 mL). The resulting tan solid was isolated by filtration, washed with water, dried and then recrystallized from isopropanol (25 mL) to provide 2.07 g of tert-butyl 2-[(2,3-dimethyl-5-nitro-6-phenoxypyridin-4-yl)amino]ethylcarbamate as white needles. The reaction was repeated using 66.5 g of starting material to provide 50.4 g of product as white needles, m.p. 158-160° C.

Workup

temperaturea chilled
temperatureThe reaction mixture was cooled
customThe resulting tan solid was isolated by filtration
washwashed with water
customdried
customrecrystallized from isopropanol (25 mL)

Sources & evidence

ORD record: ord-58c69a893c584ff6a695d00e11f6efae
Source dataset: uspto-grants-2005_06
DOI: 10.6084/m9.figshare.5104873.v1
Patent number: US06903113B2

Reaction notes

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