Ethanol → HCID 178450683, compound

HRID 2036960Notes

Reaction equation

[Cl:1][C:2]1[CH:3]=[C:4]([NH:8][C:9]2[CH:14]=[C:13]([NH:15][C:16]3[CH:17]=[C:18]([CH:26]=[CH:27][CH:28]=3)[C:19]([O:21][C:22]([CH3:25])([CH3:24])[CH3:23])=[O:20])[N:12]3[N:29]=[CH:30][C:31]([CH:32]=O)=[C:11]3[N:10]=2)[CH:5]=[CH:6][CH:7]=1.C(O)C.[NH:37]1[CH2:43][C:41](=[O:42])[NH:40][C:38]1=[O:39].N1CCCCC1>O>[Cl:1][C:2]1[CH:3]=[C:4]([NH:8][C:9]2[CH:14]=[C:13]([NH:15][C:16]3[CH:17]=[C:18]([CH:26]=[CH:27][CH:28]=3)[C:19]([O:21][C:22]([CH3:23])([CH3:25])[CH3:24])=[O:20])[N:12]3[N:29]=[CH:30][C:31]([CH:32]=[C:43]4[C:41](=[O:42])[NH:40][C:38](=[O:39])[NH:37]4)=[C:11]3[N:10]=2)[CH:5]=[CH:6][CH:7]=1

Participants

Conditions

Temperature: 80 °C

Procedure

To the reaction flask, tert-butyl 3-(5-(3-chlorophenylamino)-3-formylpyrazolo[1,5-a]pyrimidin-7-ylamino)benzoate (122 mg, 0.3 mmol) was added to ethanol (1.3 mL) along with hydantoin (26 mg, 0.3 mmol) and piperidine (26 μL, 0.3 mmol). The reaction was heated at 80° C. for 2 hours in the microwave then cooled to room temperature and diluted with water. The solid was collected by filtration, washed with water, 50% ethanol/water, and then 100% ethanol. The material was dried under vacuum overnight. The product, tert-butyl 3-(5-(3-chlorophenylamino)-3-((2,5-dioxoimidazolidin-4-ylidene)methyl)pyrazolo[1,5-a]pyrimidin-7-ylamino)benzoate, was recovered as a solid in 69% yield. LCMS (M+1=546)

Workup

temperaturethen cooled to room temperature
filtrationThe solid was collected by filtration
washwashed with water, 50% ethanol/water
customThe material was dried under vacuum overnight
customThe product, tert-butyl 3-(5-(3-chlorophenylamino)-3-((2,5-dioxoimidazolidin-4-ylidene)methyl)pyrazolo[1,5-a]pyrimidin-7-ylamino)benzoate, was recovered as a solid in 69% yield

Sources & evidence

ORD record: ord-c5235f7739554aa9ba0db330a767c086
Source dataset: uspto-grants-2013_11
DOI: 10.6084/m9.figshare.5104873.v1
Patent number: US08575177B2

Reaction notes

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