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

HRID 1843669

Reaktionsgleichung

Reaktionsgleichung von HRID 1843669
[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

Komponenten

7

Edukt 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

Produkt 1

HCID 671844974-[1-(4-methoxybenzyl)-3-(3-nitrophenyl)-1H-pyrazol-4-yl]-2-(methylsulfanyl)-pyrimidineAusbeute 88,4 %

Reagenzien, Katalysatoren, Lösungsmittel 3

HCID 178418397HCID 178418397, VerbindungKatalysatorHCID 962WaterLösungsmittelHCID 312751,4-DioxaneLösungsmittel

Reaktionsbedingungen

Temperatur
100 °C

Versuchsvorschrift

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.

Aufarbeitung

  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)

Quellen und Nachweise

ORD-Eintrag
ord-7e9242758018482096ba4ab72d2655b4
Quelldatensatz
uspto-grants-2015_02
Patentnummer
US08946250B2

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