Cesium carbonate → 4-[1-(4-methoxybenzyl)-3-(3-nitrophenyl)-1H-pyrazol-4-yl]-2-(methylsulfanyl)-pyrimidine

HRID 1843669

Reaction equation

HRID 1843669 reaction equation
[CH3:1][O:2][C:3]1[CH:32]=[CH:31][C:6]([CH2:7][N:8]2[CH:12]=[C:11](B3OC(C)(C)C(C)(C)O3)[C:10]([C:22]3[CH:27]=[CH:26][CH:25]=[C:24]([N+:28]([O-:30])=[O:29])[CH:23]=3)=[N:9]2)=[CH:5][CH:4]=1.[CH3:33][S:34][C:35]1[N:40]=[C:39](Cl)[CH:38]=[CH:37][N:36]=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>[CH3:1][O:2][C:3]1[CH:4]=[CH:5][C:6]([CH2:7][N:8]2[CH:12]=[C:11]([C:37]3[CH:38]=[CH:39][N:40]=[C:35]([S:34][CH3:33])[N:36]=3)[C:10]([C:22]3[CH:27]=[CH:26][CH:25]=[C:24]([N+:28]([O-:30])=[O:29])[CH:23]=3)=[N:9]2)=[CH:31][CH:32]=1

Participants

7

Reactant 3

HCID 10796Cesium carbonateHCID 971134-Chloro-2-methylthiopyrimidineHCID 671842181-(4-methoxybenzyl)-3-(3-nitrophenyl)-4-(4,4,5,5-tetramethyl-1,3,2-dioxaborolan-2-yl)-1H-pyrazole

Product 1

HCID 671844974-[1-(4-methoxybenzyl)-3-(3-nitrophenyl)-1H-pyrazol-4-yl]-2-(methylsulfanyl)-pyrimidineYield 88.4%

Reagents, catalysts & solvents 3

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

Conditions

Temperature
100 °C

Procedure

2.6 g (6 mmol) of 1-(4-methoxybenzyl)-3-(3-nitrophenyl)-4-(4,4,5,5-tetramethyl-1,3,2-dioxaborolan-2-yl)-1H-pyrazole were dissolved in a mixture of 520 ml of dioxane and 130 ml of water under a nitrogen atmosphere. 709 μl (6 mmol) of 2-methylthio-4-chloro-pyrimidine, 3.9 g (12 mmol) of cesium carbonate and 650 mg (0.6 mmol) of palladium tetrakis were added consecutively to the resulting solution under stirring. The reaction mixture was heated at 100° C. for 6 hours, then filtered through a celite pad and concentrated under reduced pressure. The residue was partitioned between dichloromethane and water, the organic layer dried over sodium sulphate and evaporated to dryness. The crude was finally purified by flash-chromatography on a silica gel column (cyclohexane-ethylacetate; from 9/1 to 4/1), giving 2.3 g (88%) of the title compound.

Workup

  1. filtrationfiltered through a celite pad
  2. concentrationconcentrated under reduced pressure
  3. customThe residue was partitioned between dichloromethane and water
  4. dry with materialthe organic layer dried over sodium sulphate
  5. customevaporated to dryness
  6. customThe crude was finally purified by flash-chromatography on a silica gel column (cyclohexane-ethylacetate; from 9/1 to 4/1)

Sources & evidence

ORD record
ord-7e9242758018482096ba4ab72d2655b4
Source dataset
uspto-grants-2015_02
Patent number
US08946250B2

Linked notes

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