Cesium carbonate → 4-amino-6-[[(1S)-1-[6-fluoro-1-methyl-7-(1-methylpyrazol-4-yl)benzimidazol-2-yl]ethyl]amino]pyrimidine-5-carbonitrile

HRID 243501Notes

Reaction equation

HRID 243501 reaction equation
[NH2:1][C:2]1[C:7]([C:8]#[N:9])=[C:6]([NH:10][C@H:11]([C:13]2[N:17]([CH3:18])[C:16]3[C:19](Br)=[C:20]([F:23])[CH:21]=[CH:22][C:15]=3[N:14]=2)[CH3:12])[N:5]=[CH:4][N:3]=1.[CH3:25][N:26]1[CH:30]=[C:29](B2OC(C)(C)C(C)(C)O2)[CH:28]=[N:27]1.C(=O)([O-])[O-].[Cs+].[Cs+]>O1CCOCC1.O.C1C=CC([P]([Pd]([P](C2C=CC=CC=2)(C2C=CC=CC=2)C2C=CC=CC=2)([P](C2C=CC=CC=2)(C2C=CC=CC=2)C2C=CC=CC=2)[P](C2C=CC=CC=2)(C2C=CC=CC=2)C2C=CC=CC=2)(C2C=CC=CC=2)C2C=CC=CC=2)=CC=1>[NH2:1][C:2]1[C:7]([C:8]#[N:9])=[C:6]([NH:10][C@H:11]([C:13]2[N:17]([CH3:18])[C:16]3[C:19]([C:29]4[CH:28]=[N:27][N:26]([CH3:25])[CH:30]=4)=[C:20]([F:23])[CH:21]=[CH:22][C:15]=3[N:14]=2)[CH3:12])[N:5]=[CH:4][N:3]=1

Participants

7

Reactant 3

HCID 10796Cesium carbonateHCID 27739871-Methyl-4-(4,4,5,5-tetramethyl-1,3,2-dioxaborolan-2-yl)-1H-pyrazoleHCID 681575724-Amino-6-[(S)-1-(7-bromo-6-fluoro-1-methyl-1H-benzoimidazol-2-yl)ethylamino]pyrimidine-5-carbonitrile

Product 1

HCID 681571704-amino-6-[[(1S)-1-[6-fluoro-1-methyl-7-(1-methylpyrazol-4-yl)benzimidazol-2-yl]ethyl]amino]pyrimidine-5-carbonitrileYield 81%

Reagents, catalysts & solvents 3

HCID 178418397HCID 178418397, compoundCatalystHCID 962WaterSolventHCID 312751,4-DioxaneSolvent

Conditions

Temperature
140 °C

Procedure

A mixture of 4-Amino-6-[(S)-1-(7-bromo-6-fluoro-1-methyl-1H-benzoimidazol-2-yl)ethylamino]-pyrimidine-5-carbonitrile, (0.10 g, 0.26 mmol), 1-methyl-4-(4,4,5,5-tetramethyl-[1,3,2]dioxaborolan-2-yl)-1H-pyrazole (0.069 g, 0.33 mmol), tetrakis(triphenylphosphine)palladium(0) (0.015 g, 0.01 mmol) and caesium carbonate (0.17 g, 0.51 mmol) in dioxane (3 mL) and water (1.5 mL) was placed in a sealed tube and degassed with nitrogen for 5 minutes, then heated for 30 minutes at 140° C. by microwave irradiation. The resulting mixture was loaded onto an Isolute® SCX-2 cartridge then washed with MeOH and the product eluted with 2M NH3/MeOH and concentrated in vacuo. The resulting residue was purified by chromatography (SiO2, 0-10% (2M ammonia in methanol) in DCM) then by preparative HPLC (Phenomenex Gemini 5 μm C18 on a 78 min gradient 20-98% 0.1% HCO2H in acetonitrile/water) to give 427 as a white solid (0.081 g, 81%). LCMS (Method K): RT 2.50 min [M+H]+ 392.1. 1H NMR (DMSO-d6, 400 MHz): δ 8.24 (1H, s), 7.92 (1H, s), 7.67-7.59 (2H, m), 7.31 (2H, s), 7.12-7.08 (1H, m), 5.64 (1H, m), 3.93 (3H, s), 3.17 (3H, s), 1.58 (3H, d, J=6.74 Hz)

Workup

  1. customwas placed in a sealed tube
  2. customdegassed with nitrogen for 5 minutes
  3. washthen washed with MeOH
  4. washthe product eluted with 2M NH3/MeOH
  5. concentrationconcentrated in vacuo
  6. customThe resulting residue was purified by chromatography (SiO2, 0-10% (2M ammonia in methanol) in DCM)

Sources & evidence

ORD record
ord-6eddaaf343c04610930f8d5fada3b1b8
Source dataset
uspto-grants-2014_02
Patent number
US08653089B2

Reaction notes

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