Hydrochloric Acid → 1-[5-Chloro-4-(1-methylethyl)amino-3-pyridazinyl]piperazine

HRID 2395752Notizen

Reaktionsgleichung

Reaktionsgleichung von HRID 2395752
Cl[C:2]1[N:3]=[N:4][CH:5]=[C:6]([Cl:12])[C:7]=1[NH:8][CH:9]([CH3:11])[CH3:10].[NH:13]1[CH2:18][CH2:17][NH:16][CH2:15][CH2:14]1.Cl>C1(C)C(C)=CC=CC=1>[Cl:12][C:6]1[C:7]([NH:8][CH:9]([CH3:11])[CH3:10])=[C:2]([N:13]2[CH2:18][CH2:17][NH:16][CH2:15][CH2:14]2)[N:3]=[N:4][CH:5]=1

Komponenten

5

Edukt 3

HCID 313Hydrochloric AcidHCID 4837PiperazineHCID 108221363,5-Dichloro-4-(1-methylethylamino)pyridazine

Produkt 1

HCID 214776731-[5-Chloro-4-(1-methylethyl)amino-3-pyridazinyl]piperazine

Reagenzien, Katalysatoren, Lösungsmittel 1

HCID 7237O-XyleneLösungsmittel

Versuchsvorschrift

A mixture of 3,5-dichloro-4-(1-methylethyl)aminopyridazine (PREPARATION 31, 1.77 g) and piperazine (2.96 g) in xylene (18 ml) is refluxed for 40 hr. The mixture is cooled and then treated with concentrated hydrochloric acid (8 ml). After further cooling, a precipitate forms and the organic liquid is separated. The aqueous phase is diluted with an excess of a solution of aqueous sodium hydroxide (10%) and then is extracted with chloroform (3 ×). The combined organic extracts are washed with water, then saline, dried over sodium sulfate, and concentrated to an oil. The crude produce is flash chromatographed on silica gel eluting with methanol. The appropriate fractions are pooled and concentrated to give the title compound, NMR (CDCl3) 1.20, 3.04, 3.18, 4.46, 4.73 and 8.50 δ; CMR (CDCl3) 24.0, 44.3, 45.9, 50.2, 118.2, 135.8, 148.3 and 155.4 δ.

Aufarbeitung

  1. temperatureis refluxed for 40 hr
  2. temperatureThe mixture is cooled
  3. temperatureAfter further cooling
  4. customa precipitate forms and the organic liquid is separated
  5. additionThe aqueous phase is diluted with an excess of a solution of aqueous sodium hydroxide (10%)
  6. extractionis extracted with chloroform (3 ×)
  7. washThe combined organic extracts are washed with water
  8. dry with materialsaline, dried over sodium sulfate
  9. concentrationconcentrated to an oil
  10. customThe crude produce
  11. customchromatographed on silica gel eluting with methanol
  12. concentrationconcentrated

Quellen und Nachweise

ORD-Eintrag
ord-76dff2ee420c43058bd0ca88d0c1a0c9
Quelldatensatz
uspto-grants-1996_02
Patentnummer
US05489593

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