Piperidine → 5-[[7-(cyclopropylamino)-5-(2-fluoro-4-pyridinyl)pyrazolo[1,5-a]pyrimidin-3-yl]methylidene]-2-sulfanylidene-1,3-thiazolidin-4-one

HRID 624718Notes

Reaction equation

[CH:1]1([NH:4][C:5]2[N:10]3[N:11]=[CH:12][C:13]([CH:14]=O)=[C:9]3[N:8]=[C:7]([C:16]3[CH:21]=[CH:20][N:19]=[C:18]([F:22])[CH:17]=3)[CH:6]=2)[CH2:3][CH2:2]1.N1CCCCC1.[S:29]1[CH2:35][C:33](=[O:34])[NH:32][C:30]1=[S:31]>CCO>[CH:1]1([NH:4][C:5]2[N:10]3[N:11]=[CH:12][C:13]([CH:14]=[C:35]4[S:29][C:30](=[S:31])[NH:32][C:33]4=[O:34])=[C:9]3[N:8]=[C:7]([C:16]3[CH:21]=[CH:20][N:19]=[C:18]([F:22])[CH:17]=3)[CH:6]=2)[CH2:2][CH2:3]1

Participants

Conditions

Temperature: 80 °C

Procedure

To 7-(cyclopropylamino)-5-(2-fluoropyridin-4-yl)pyrazolo[1,5-a]pyrimidine-3-carbaldehyde 30 mg, 0.1 mmol) in EtOH (1 mL) was added piperidine (13 μL, 0.1 mmol), and rhodanine (13 mg, 0.1 mmol). The reaction was stirred at 80° C. for 2 hours. The solid formed was isolated by filtration, washed with water then ethanol. The recovered solid was further purified by washing with 20% methanol/dichloromethan to provide 15 mg of 5-((7-(cyclopropylamino)-5-(2-fluoropyridin-4-yl)pyrazolo[1,5-a]pyrimidin-3-yl)methylene)-2-thioxothiazolidin-4-one (35%). LCMS (M+1=413)

Workup

customThe solid formed
customwas isolated by filtration
washwashed with water
customThe recovered solid was further purified
washby washing with 20% methanol/dichloromethan

Sources & evidence

ORD record: ord-b7263b497e494c898ee2eae033c47a7b
Source dataset: uspto-grants-2016_04
DOI: 10.6084/m9.figshare.5104873.v1
Patent number: US09303033B2

Reaction notes

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