N,N-Dimethylaniline → 4-Chloro-3-(2-chloroethyl)-8-mesityl-2,6-dimethylimidazo[1,5-a]pyrimidine

HRID 584803Notes

Reaction equation

[Cl:1][CH2:2][CH2:3][C:4]1[C:5]([CH3:24])=[N:6][C:7]2[N:8]([C:11]([CH3:23])=[N:12][C:13]=2[C:14]2[C:19]([CH3:20])=[CH:18][C:17]([CH3:21])=[CH:16][C:15]=2[CH3:22])[C:9]=1O.CN(C)C1C=CC=CC=1.NC(CC)CC.O.P(Cl)(Cl)([Cl:43])=O>C(#N)C>[Cl:43][C:9]1[N:8]2[C:11]([CH3:23])=[N:12][C:13]([C:14]3[C:19]([CH3:20])=[CH:18][C:17]([CH3:21])=[CH:16][C:15]=3[CH3:22])=[C:7]2[N:6]=[C:5]([CH3:24])[C:4]=1[CH2:3][CH2:2][Cl:1]

Participants

Conditions

Temperature: 80 °C

Procedure

A solution of 3-(2-chloroethyl)-8-mesityl-2,6-dimethylimidazo[1,5-a]pyrimidin-4-ol (200 mg, 0.58 mmol) and N,N-dimethylaniline (0.3 mL) in phosphorus oxychloride (3 mL) was heated under reflux for six hours. After overnight, 3-aminopentane (2 mL) was added to a solution of the residue in acetonitrile (5 mL), followed by stirring at 80° C. for three hours. Water was added, and the mixture was extracted with ethyl acetate, washed with brine, dried over anhydrous magnesium sulfate and evaporated. The residue was purified by silica gel column chromatogrpahy (10-20% ethyl acetate/hexane), to give the title compound (139 mg) as pale yellow crystals.

Workup

temperatureunder reflux for six hours
extractionthe mixture was extracted with ethyl acetate
washwashed with brine
dry with materialdried over anhydrous magnesium sulfate
customevaporated
customThe residue was purified by silica gel column chromatogrpahy (10-20% ethyl acetate/hexane)

Sources & evidence

ORD record: ord-4bec78097ef2461aa28f0c8fb141cbd6
Source dataset: uspto-grants-2005_08
DOI: 10.6084/m9.figshare.5104873.v1
Patent number: US06927221B2

Reaction notes

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