Potassium Carbonate → 4-[2-Chloro-5-(5-isopropyl-2-methyl-phenoxymethyl)-6-methyl-pyrimidin-4-yl]-piperazine-1-carboxylic acid tert-butyl ester

HRID 1091939

Reaktionsgleichung

Reaktionsgleichung von HRID 1091939
[Cl:1][C:2]1[N:7]=[C:6](Cl)[C:5]([CH2:9][O:10][C:11]2[CH:16]=[C:15]([CH:17]([CH3:19])[CH3:18])[CH:14]=[CH:13][C:12]=2[CH3:20])=[C:4]([CH3:21])[N:3]=1.[C:22]([O:26][C:27]([N:29]1[CH2:34][CH2:33][NH:32][CH2:31][CH2:30]1)=[O:28])([CH3:25])([CH3:24])[CH3:23].C(=O)([O-])[O-].[K+].[K+]>CC(N(C)C)=O>[C:22]([O:26][C:27]([N:29]1[CH2:34][CH2:33][N:32]([C:6]2[C:5]([CH2:9][O:10][C:11]3[CH:16]=[C:15]([CH:17]([CH3:19])[CH3:18])[CH:14]=[CH:13][C:12]=3[CH3:20])=[C:4]([CH3:21])[N:3]=[C:2]([Cl:1])[N:7]=2)[CH2:31][CH2:30]1)=[O:28])([CH3:25])([CH3:23])[CH3:24]

Komponenten

5

Edukt 3

HCID 11430Potassium CarbonateHCID 143452tert-Butyl piperazine-1-carboxylateHCID 575314422,4-Dichloro-5-(5-isopropyl-2-methyl-phenoxymethyl)-6-methyl-pyrimidine

Produkt 1

HCID 575313954-[2-Chloro-5-(5-isopropyl-2-methyl-phenoxymethyl)-6-methyl-pyrimidin-4-yl]-piperazine-1-carboxylic acid tert-butyl ester

Reagenzien, Katalysatoren, Lösungsmittel 1

HCID 31374DimethylacetamideLösungsmittel

Versuchsvorschrift

To a solution of 2,4-dichloro-5-(5-isopropyl-2-methyl-phenoxymethyl)-6-methyl-pyrimidine (978 mg, 3.01 mmol) in DMA (4 mL) is added piperazine-1-carboxylic acid tert-butyl ester (560 mg, 3.01 mmol) and potassium carbonate (832 mg, 6.02 mmol). The resulting colorless suspension is stirred at room temperature under nitrogen for 16 h. The reaction mixture is partitioned between EtOAc (60 mL) and water (20 mL), the organic layer is separated, washed with water (20 mL×2), brine (20 mL), dried over sodium sulfate, filtered and evaporated at reduced pressure to obtain a colorless oil consisting of a ˜2:1 mixture of isomeric addition products. Purification on a 30 g cartridge of silica gel (10-30% EtOAc/Hexanes) affords the title compound (lower Rf material) as a colorless solid foam. 1H NMR (CDCl3) δ=7.11 (d, 1H), 6.83 (d, 1H), 6.75 (s, 1H), 4.84 (s, 2H), 3.52 (m, 8H), 2.90 (m, 1H), 2.47, (s, 3H), 2.16, (s, 3H), 1.45, (s, 9H), 1.27 (d, 6H).

Aufarbeitung

  1. customThe reaction mixture is partitioned between EtOAc (60 mL) and water (20 mL)
  2. customthe organic layer is separated
  3. washwashed with water (20 mL×2), brine (20 mL)
  4. dry with materialdried over sodium sulfate
  5. filtrationfiltered
  6. customevaporated at reduced pressure
  7. customto obtain a colorless oil
  8. additionconsisting of a ˜2:1 mixture of isomeric addition products
  9. customPurification on a 30 g cartridge of silica gel (10-30% EtOAc/Hexanes)

Quellen und Nachweise

ORD-Eintrag
ord-a85bb07341e649c699e47aa4db0b4a71
Quelldatensatz
uspto-grants-2012_03
Patentnummer
US08129395B2

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