Triethylamine → 4-Amino-2-[4-(1,4-benzodioxan-2-carbonyl)piperazin-1-yl]-6,7-dimethoxyquinoline hydrochloride hydrate

HRID 845412Notizen

Reaktionsgleichung

Reaktionsgleichung von HRID 845412
[O:1]1[C:6]2[CH:7]=[CH:8][CH:9]=[CH:10][C:5]=2[O:4][CH2:3][CH:2]1[C:11]([Cl:13])=[O:12].[NH2:14][C:15]1[C:24]2[C:19](=[CH:20][C:21]([O:27][CH3:28])=[C:22]([O:25][CH3:26])[CH:23]=2)[N:18]=[C:17]([N:29]2[CH2:34][CH2:33][NH:32][CH2:31][CH2:30]2)[CH:16]=1.C(N(CC)CC)C>C(Cl)(Cl)Cl>[OH2:1].[ClH:13].[NH2:14][C:15]1[C:24]2[C:19](=[CH:20][C:21]([O:27][CH3:28])=[C:22]([O:25][CH3:26])[CH:23]=2)[N:18]=[C:17]([N:29]2[CH2:30][CH2:31][N:32]([C:11]([CH:2]3[O:1][C:6]4[CH:7]=[CH:8][CH:9]=[CH:10][C:5]=4[O:4][CH2:3]3)=[O:12])[CH2:33][CH2:34]2)[CH:16]=1

Komponenten

5

Edukt 3

HCID 8471TriethylamineHCID 27354472,3-Dihydro-1,4-benzodioxin-2-carbonyl chlorideHCID 140689984-Amino-6,7-dimethoxy-2-(piperazin-1-yl)quinoline

Produkt 1

HCID 201311304-Amino-2-[4-(1,4-benzodioxan-2-carbonyl)piperazin-1-yl]-6,7-dimethoxyquinoline hydrochloride hydrateAusbeute 29,4 %

Reagenzien, Katalysatoren, Lösungsmittel 1

HCID 6212ChloroformLösungsmittel2×

Versuchsvorschrift

A solution of 1,4-benzodioxan-2-carbonyl chloride (0.75 g) in chloroform (10 ml) was added dropwise to a stirred solution of 4-amino-6,7-dimethoxy-2-(piperazin-1-yl)quinoline (1.0 g) in chloroform (50 ml) with triethylamine (1.06 g) at 5°-10°. The reaction was stirred at 5°-10° for one hour, then allowed to attain room temperature and stirred overnight. The mixture was then evaporated in vacuo and the residue partitioned between chloroform (50 ml) and sodium carbonate solution (10%, 50 ml). The chloroform layer was separated, the aqueous phase extracted with chloroform (2×50 ml), the extracts combined, washed with brine, dried (Na2SO4) and evaporated in vacuo. The residue was then taken up in chloroform and chromatographed on silica (Merck 9385, 60 g) eluting with chloroform/methanol (100:0→97:3). A solution of the purified product in chloroform was treated with ethereal hydrogen chloride, evaporated in vacuo and the residue recrystallised from isopropanol to give 4-amino-2-[ 4-(1,4-benzodioxan-2-carbonyl)piperazin-1-yl]-6,7-dimethoxyquinoline hydrochloride hydrate (0.28 g), m.p. 201°.

Aufarbeitung

  1. customto attain room temperature
  2. stirringstirred overnight
  3. customThe mixture was then evaporated in vacuo
  4. customthe residue partitioned between chloroform (50 ml) and sodium carbonate solution (10%, 50 ml)
  5. customThe chloroform layer was separated
  6. extractionthe aqueous phase extracted with chloroform (2×50 ml)
  7. washwashed with brine
  8. dry with materialdried (Na2SO4)
  9. customevaporated in vacuo
  10. customchromatographed on silica (Merck 9385, 60 g)
  11. washeluting with chloroform/methanol (100:0→97:3)
  12. additionA solution of the purified product in chloroform was treated with ethereal hydrogen chloride
  13. customevaporated in vacuo
  14. customthe residue recrystallised from isopropanol

Quellen und Nachweise

ORD-Eintrag
ord-c3a45ae121014ae59922673fa4b81273
Quelldatensatz
uspto-grants-1988_07
Patentnummer
US04758568

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