Potassium Iodide → 2-methyl-3-[2-[4-[[1-(2-pyrazinylmethyl)-1H-benzimidazol-2-yl]amino]-1-piperidinyl]ethyl]-4H-pyrido[1,2-a]pyrimidin-4-one

HRID 893686Notizen

Reaktionsgleichung

Reaktionsgleichung von HRID 893686
Cl[CH2:2][CH2:3][C:4]1[C:9](=[O:10])[N:8]2[CH:11]=[CH:12][CH:13]=[CH:14][C:7]2=[N:6][C:5]=1[CH3:15].Br.Br.Br.[NH:19]1[CH2:24][CH2:23][CH:22]([NH:25][C:26]2[N:30]([CH2:31][C:32]3[CH:37]=[N:36][CH:35]=[CH:34][N:33]=3)[C:29]3[CH:38]=[CH:39][CH:40]=[CH:41][C:28]=3[N:27]=2)[CH2:21][CH2:20]1.C(=O)([O-])[O-].[Na+].[Na+].[I-].[K+]>O.CN(C)C(=O)C>[CH3:15][C:5]1[N:6]=[C:7]2[CH:14]=[CH:13][CH:12]=[CH:11][N:8]2[C:9](=[O:10])[C:4]=1[CH2:3][CH2:2][N:19]1[CH2:20][CH2:21][CH:22]([NH:25][C:26]2[N:30]([CH2:31][C:32]3[CH:37]=[N:36][CH:35]=[CH:34][N:33]=3)[C:29]3[CH:38]=[CH:39][CH:40]=[CH:41][C:28]=3[N:27]=2)[CH2:23][CH2:24]1

Komponenten

7

Edukt 4

HCID 4875Potassium IodideHCID 10340Sodium CarbonateHCID 8178663-(2-Chloroethyl)-2-methyl-4H-pyrido[1,2-a]pyrimidin-4-oneHCID 19890729N-(4-piperidinyl)-1-(2-pyrazinylmethyl)-1H-benzimidazol-2-amine trihydrobromide

Produkt 1

HCID 139832072-methyl-3-[2-[4-[[1-(2-pyrazinylmethyl)-1H-benzimidazol-2-yl]amino]-1-piperidinyl]ethyl]-4H-pyrido[1,2-a]pyrimidin-4-oneAusbeute 67,4 %

Reagenzien, Katalysatoren, Lösungsmittel 2

HCID 962WaterLösungsmittelHCID 31374DimethylacetamideLösungsmittel

Reaktionsbedingungen

Temperatur
80 °C

Versuchsvorschrift

A mixture of 3.15 parts of 3-(2-chloroethyl)-2-methyl-4H-pyrido[1,2-a]pyrimidin-4-one, 8.26 parts of N-(4-piperidinyl)-1-(2-pyrazinylmethyl)-1H-benzimidazol-2-amine trihydrobromide, 6.4 parts of sodium carbonate, 0.1 parts of potassium iodide and 90 parts of N,N-dimethylacetamide was stirred and heated overnight at 80° C. The reaction mixture was poured into water. The product was extracted with trichloromethane. The extract was dried, filtered and evaporated. The residue was purified by column chromatography over silica gel using a mixture of trichloromethane and methanol, saturated with ammonia, (96:4 by volume) as eluent. The pure fractions were collected and the eluent was evaporated. The residue was crystallized from acetonitrile. The product was filtered off and dried, yielding 5 parts (67.4%) of 2-methyl-3-[2-[4-[[1-(2-pyrazinylmethyl)- 1H-benzimidazol-2-yl]amino]-1-piperidinyl]ethyl]-4H-pyrido[1,2-a]pyrimidin-4-one; mp. 204.4° C. (compound 68).

Aufarbeitung

  1. extractionThe product was extracted with trichloromethane
  2. customThe extract was dried
  3. filtrationfiltered
  4. customevaporated
  5. customThe residue was purified by column chromatography over silica gel using
  6. additiona mixture of trichloromethane and methanol
  7. customThe pure fractions were collected
  8. customthe eluent was evaporated
  9. customThe residue was crystallized from acetonitrile
  10. filtrationThe product was filtered off
  11. customdried

Quellen und Nachweise

ORD-Eintrag
ord-2b1649b2eb334d41aa5f273c3994678d
Quelldatensatz
uspto-grants-1992_06
Patentnummer
US05126339

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