Potassium Iodide → 5-chloro-1,3-dihydro-1-{1-[3-(2-oxo-3(2H)-benzothiazolyl)propyl]-4-piperidinyl}-2H-benzimidazol-2-one

HRID 1704516

Reaktionsgleichung

Reaktionsgleichung von HRID 1704516
Br[CH2:2][CH2:3][CH2:4][N:5]1[C:9]2[CH:10]=[CH:11][CH:12]=[CH:13][C:8]=2[S:7][C:6]1=[O:14].[Cl:15][C:16]1[CH:31]=[CH:30][C:19]2[N:20]([CH:24]3[CH2:29][CH2:28][NH:27][CH2:26][CH2:25]3)[C:21](=[O:23])[NH:22][C:18]=2[CH:17]=1.C(=O)([O-])[O-].[Na+].[Na+].[I-].[K+]>O.CC(C)CC(=O)C>[Cl:15][C:16]1[CH:31]=[CH:30][C:19]2[N:20]([CH:24]3[CH2:25][CH2:26][N:27]([CH2:2][CH2:3][CH2:4][N:5]4[C:9]5[CH:10]=[CH:11][CH:12]=[CH:13][C:8]=5[S:7][C:6]4=[O:14])[CH2:28][CH2:29]3)[C:21](=[O:23])[NH:22][C:18]=2[CH:17]=1

Komponenten

7

Edukt 4

HCID 4875Potassium IodideHCID 10340Sodium CarbonateHCID 1046075-Chloro-1,3-dihydro-1-(4-piperidinyl)-2H-benzimidazol-2-oneHCID 214599273-(3-bromopropyl)-2(3H)-benzothiazolone

Produkt 1

HCID 203855725-chloro-1,3-dihydro-1-{1-[3-(2-oxo-3(2H)-benzothiazolyl)propyl]-4-piperidinyl}-2H-benzimidazol-2-oneAusbeute 31 %

Reagenzien, Katalysatoren, Lösungsmittel 2

HCID 962WaterLösungsmittel2×HCID 7909Methyl Isobutyl KetoneLösungsmittel

Versuchsvorschrift

A mixture of 5.4 parts of 3-(3-bromopropyl)-2(3H)-benzothiazolone, 4.5 parts of 5-chloro-1,3-dihydro-1-(4-piperidinyl)-2H-benzimidazol-2-one, 5.3 parts of sodium carbonate, 0.1 parts of potassium iodide and 200 parts of 4-methyl-2-pentanone is stirred and refluxed for 3 hours with water-separator. After cooling, water is added and the layers are separated. The organic phase is dried, filtered and evaporated. The residue is crystallized from a mixture of 4-methyl-2-pentanone and 2-propanone. The product is filtered off and dried, yielding 2.5 parts (31%) of 5-chloro-1,3-dihydro-1-{1-[3-(2-oxo-3(2H)-benzothiazolyl)propyl]-4-piperidinyl}-2H-benzimidazol-2-one; mp. 184.1° C.

Aufarbeitung

  1. temperatureAfter cooling
  2. customthe layers are separated
  3. customThe organic phase is dried
  4. filtrationfiltered
  5. customevaporated
  6. customThe residue is crystallized from a mixture of 4-methyl-2-pentanone and 2-propanone
  7. filtrationThe product is filtered off
  8. customdried

Quellen und Nachweise

ORD-Eintrag
ord-a87d90f063924e649db597b7104f86ee
Quelldatensatz
uspto-grants-1978_11
Patentnummer
US04126687

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