Water → 1-Methyl-4-[5-nitro-6-(propan-2-yloxy)pyridin-2-yl]piperazine

HRID 518833Notes

Reaction equation

C(=O)([O-])[O-].[K+].[K+].[CH3:7][N:8]1[CH2:13][CH2:12][NH:11][CH2:10][CH2:9]1.Cl[C:15]1[N:20]=[C:19]([O:21][CH:22]([CH3:24])[CH3:23])[C:18]([N+:25]([O-:27])=[O:26])=[CH:17][CH:16]=1.O>CS(C)=O>[CH3:7][N:8]1[CH2:13][CH2:12][N:11]([C:15]2[CH:16]=[CH:17][C:18]([N+:25]([O-:27])=[O:26])=[C:19]([O:21][CH:22]([CH3:24])[CH3:23])[N:20]=2)[CH2:10][CH2:9]1

Participants

Conditions

Temperature: 105 °C

Procedure

463 mg of potassium carbonate and 224 mg of 1-methylpiperazine are added to a solution of 484 mg of 6-chloro-3-nitro-2-(propan-2-yloxy)pyridine in 4.45 ml of DMSO. The reaction medium is heated for 1 hour at 105° C. After cooling, the mixture is run into water and extracted with ethyl acetate. The organic phase is washed with a saturated sodium chloride solution, dried over magnesium sulfate, filtered and concentrated under reduced pressure. The residue is taken up in diisopropyl ether and the insoluble material is filtered off and dried under vacuum, so as to give 460 mg of 1-methyl-4-[5-nitro-6-(propan-2-yloxy)pyridin-2-yl]piperazine in the form of a yellow solid.

Workup

temperatureAfter cooling
extractionextracted with ethyl acetate
washThe organic phase is washed with a saturated sodium chloride solution
dry with materialdried over magnesium sulfate
filtrationfiltered
concentrationconcentrated under reduced pressure
filtrationthe insoluble material is filtered off
customdried under vacuum

Sources & evidence

ORD record: ord-ef3771fabe9341d3937b312a71e67fac
Source dataset: uspto-grants-2015_08
DOI: 10.6084/m9.figshare.5104873.v1
Patent number: US09115140B2

Reaction notes

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