Cesium carbonate → 1-(3-(7-(2-Aminophenyl)imidazo[1,2-a]pyridin-3-yl)phenyl)-3-(2,2,2-trifluoroethyl)urea

HRID 2404077

Reaction equation

Cl[C:2]1[CH:7]=[CH:6][N:5]2[C:8]([C:11]3[CH:12]=[C:13]([NH:17][C:18]([NH:20][CH2:21][C:22]([F:25])([F:24])[F:23])=[O:19])[CH:14]=[CH:15][CH:16]=3)=[CH:9][N:10]=[C:4]2[CH:3]=1.CC1(C)C(C)(C)OB([C:34]2[CH:40]=[CH:39][CH:38]=[CH:37][C:35]=2[NH2:36])O1.C(=O)([O-])[O-].[Cs+].[Cs+]>C1COCC1.O.CC(C)([P](C(C)(C)C)([Pd][P](C(C)(C)C)(C(C)(C)C)C(C)(C)C)C(C)(C)C)C>[NH2:36][C:35]1[CH:37]=[CH:38][CH:39]=[CH:40][C:34]=1[C:2]1[CH:7]=[CH:6][N:5]2[C:8]([C:11]3[CH:12]=[C:13]([NH:17][C:18]([NH:20][CH2:21][C:22]([F:25])([F:24])[F:23])=[O:19])[CH:14]=[CH:15][CH:16]=3)=[CH:9][N:10]=[C:4]2[CH:3]=1

Participants

Conditions

Temperature: 125 °C

Procedure

To a mixture of 1-(3-(7-chloroimidazo[1,2-a]pyridin-3-yl)phenyl)-3-(2,2,2-trifluoroethyl)urea (20 mg, 0.052 mmol), 2-(4,4,5,5-tetramethyl-1,3,2-dioxaborolan-2-yl)aniline (15 mg, 0.066 mmol) and cesium carbonate (51 mg, 0.156 mmol) in THF/H2O mixture (2/1, 0.75 ml) was added Pd(PtBu3)2 (3 mg, 0.005 mmol). The vial was degassed for 5 minutes then capped and heated to 125° C. for 20 minutes in a microwave. After cooling to ambient temperature, the reaction mixture was filtered through a celite pad and purified via flash chromatography (0-10% MeOH/DCM gradient containing 10% NH4OH) to yield the title compound (20 mg, 90% yield). MS (ES+) C22H18F3N5O requires: 425. found: 426 [M+H]+.

Workup

customThe vial was degassed for 5 minutes
customthen capped
temperatureAfter cooling to ambient temperature
filtrationthe reaction mixture was filtered through a celite pad
custompurified via flash chromatography (0-10% MeOH/DCM gradient containing 10% NH4OH)

Sources & evidence

ORD record: ord-5c0e2477e8b64681991d0f66da3960a8
Source dataset: uspto-grants-2014_08
DOI: 10.6084/m9.figshare.5104873.v1
Patent number: US08802697B2

Linked notes

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