5-Bromo-2,4-bis(1,1-dimethylethoxy)pyrimidine → 5-(2,8-Dimethyl-5h-dibenzo[a,d]cyclohepten-5-yl)-2,4(1h,3h)-pyrimidinedione

HRID 1871974Notizen

Reaktionsgleichung

Reaktionsgleichung von HRID 1871974
C([Li])CCC.Br[C:7]1[C:8]([O:18]C(C)(C)C)=[N:9][C:10]([O:13]C(C)(C)C)=[N:11][CH:12]=1.[CH3:23][C:24]1[CH:40]=[CH:39][C:27]2[C:28](=O)[C:29]3[CH:36]=[CH:35][C:34]([CH3:37])=[CH:33][C:30]=3[CH2:31][CH2:32][C:26]=2[CH:25]=1>O1CCCC1>[CH3:37][C:34]1[CH:35]=[CH:36][C:29]2[CH:28]([C:7]3[C:8](=[O:18])[NH:9][C:10](=[O:13])[NH:11][CH:12]=3)[C:27]3[CH:39]=[CH:40][C:24]([CH3:23])=[CH:25][C:26]=3[CH:32]=[CH:31][C:30]=2[CH:33]=1

Komponenten

5

Edukt 3

HCID 8188515-Bromo-2,4-bis(1,1-dimethylethoxy)pyrimidineHCID 2211720110,11-dihydro-2,8-dimethyl-5H-dibenzo[a,d]cyclohepten-5-oneHCID 178418339Butyllithium

Produkt 1

HCID 221172135-(2,8-Dimethyl-5h-dibenzo[a,d]cyclohepten-5-yl)-2,4(1h,3h)-pyrimidinedione

Reagenzien, Katalysatoren, Lösungsmittel 1

HCID 8028TetrahydrofuranLösungsmittel2×

Reaktionsbedingungen

Temperatur
120 °C

Versuchsvorschrift

n-Butyllithium (5.6 ml of a 2.5M solution in hexanes) was added dropwise to a solution of the product of example 1 step (iii) (3.85 g) in tetrahydrofuran (30 ml) at -78° C. The solution was stirred for 30 minutes and a solution of 10,11-dihydro-2,8-dimethyl-5H-dibenzo[a,d]cyclohepten-5-one (European Patent, 1993, 0 589 322 A1) (3.0 g) in tetrahydrofuran (20 ml) was added. The mixture was stirred at -78° C. for 45 minutes and room temperature for 15 minutes and then partitioned between brine and ethyl acetate. The organic phase was dried (MgSO4) and evaporated. The residue was dissolved in glacial acetic acid (100 ml) and heated at 120° C. for 30 minutes. The solvent was evaporated and the residue azeotroped with toluene and triturated with diethyl ether to give a solid. Yield 4.03 g.

Aufarbeitung

  1. stirringThe mixture was stirred at -78° C. for 45 minutes and room temperature for 15 minutes
  2. custompartitioned between brine and ethyl acetate
  3. dry with materialThe organic phase was dried (MgSO4)
  4. customevaporated
  5. dissolutionThe residue was dissolved in glacial acetic acid (100 ml)
  6. customThe solvent was evaporated
  7. customthe residue azeotroped with toluene
  8. customtriturated with diethyl ether
  9. customto give a solid

Quellen und Nachweise

ORD-Eintrag
ord-0ede6013a5014b8180dd8c4a89d7a823
Quelldatensatz
uspto-grants-2000_08
Patentnummer
US06107297

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