4-Aminophenol → 4-(2-(4-Aminophenoxy)pyridin-3-yl)pyrimidin-2-amine

HRID 1408502Notes

Reaction equation

[NH2:1][C:2]1[CH:7]=[CH:6][C:5]([OH:8])=[CH:4][CH:3]=1.C(=O)([O-])[O-].[Cs+].[Cs+].CS(C)=O.Cl[C:20]1[C:25]([C:26]2[CH:31]=[CH:30][N:29]=[C:28]([NH2:32])[N:27]=2)=[CH:24][CH:23]=[CH:22][N:21]=1>O>[NH2:1][C:2]1[CH:7]=[CH:6][C:5]([O:8][C:20]2[C:25]([C:26]3[CH:31]=[CH:30][N:29]=[C:28]([NH2:32])[N:27]=3)=[CH:24][CH:23]=[CH:22][N:21]=2)=[CH:4][CH:3]=1

Participants

Conditions

Temperature: 100 °C

Procedure

To a resealable tube was added 4-aminophenol (1.3 g, 12 mmol), cesium carbonate (7.8 g, 24 mmol), and DMSO (16 ml, 0.75 M). The mixture was heated to 100° C. for 5 minutes, and then 4-(2-chloropyridin-3-yl)pyrimidin-2-amine (2.5 g, 12 mmol) was added, and the reaction mixture was heated to 130° C. overnight. Upon completion, as judged by LCMS, the reaction mixture was allowed to cool to RT and diluted with water. The resulting precipitate was filtered, and the solid washed with water and diethyl ether. The solid was then taken up in 9:1 CH2Cl2:MeOH and passed through a pad of silica gel with 9:1 CH2Cl2:MeOH as eluent. The solvent was concentrated in vacuo to provide the desired product, 4-(2-(4-aminophenoxy)pyridin-3-yl)pyrimidin-2-amine MS m/z=280 [M+1]+. Calc'd for C15H13N5O: 279.30.

Workup

temperaturethe reaction mixture was heated to 130° C. overnight
temperatureto cool to RT
filtrationThe resulting precipitate was filtered
washthe solid washed with water and diethyl ether
concentrationThe solvent was concentrated in vacuo

Sources & evidence

ORD record: ord-309c6a4a33bb44e4b66249fae09b0ca6
Source dataset: uspto-grants-2014_12
DOI: 10.6084/m9.figshare.5104873.v1
Patent number: US08921367B2

Reaction notes

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