Piperazine → N-(1-(6-chloro-2,3-dihydrobenzo[b][1,4]dioxin-8-yl)ethyl)-2-(methylsulfonyl)-5-(piperazin-1-yl)benzenamine

HRID 2426032Notizen

Reaktionsgleichung

Reaktionsgleichung von HRID 2426032
ClC1C=C(C(N)C)C2OCCOC=2C=1.FC1C=C(F)C=CC=1S(C)(=O)=O.C(N(C(C)C)CC)(C)C.[Cl:36][C:37]1[CH:46]=[C:45]([CH:47]([NH:49][C:50]2[CH:55]=[C:54](F)[CH:53]=[CH:52][C:51]=2[S:57]([CH3:60])(=[O:59])=[O:58])[CH3:48])[C:40]2[O:41][CH2:42][CH2:43][O:44][C:39]=2[CH:38]=1.[NH:61]1[CH2:66][CH2:65][NH:64][CH2:63][CH2:62]1>CN(C)C=O.C(#N)C.O>[Cl:36][C:37]1[CH:46]=[C:45]([CH:47]([NH:49][C:50]2[CH:55]=[C:54]([N:61]3[CH2:66][CH2:65][NH:64][CH2:63][CH2:62]3)[CH:53]=[CH:52][C:51]=2[S:57]([CH3:60])(=[O:59])=[O:58])[CH3:48])[C:40]2[O:41][CH2:42][CH2:43][O:44][C:39]=2[CH:38]=1

Komponenten

9

Edukt 5

HCID 4837PiperazineHCID 81531Diisopropylethylamine2×HCID 27583362,4-Difluoro-1-(methylsulfonyl)benzeneHCID 587073121-(6-Chloro-2,3-dihydrobenzo[b][1,4]dioxin-8-yl)ethanamineHCID 67147312N-(1-(6-chloro-2,3-dihydrobenzo[b][1,4]dioxin-8-yl)ethyl)-5-fluoro-2-(methylsulfonyl)benzenamine

Produkt 1

HCID 11633830N-(1-(6-chloro-2,3-dihydrobenzo[b][1,4]dioxin-8-yl)ethyl)-2-(methylsulfonyl)-5-(piperazin-1-yl)benzenamineAusbeute 80 %

Reagenzien, Katalysatoren, Lösungsmittel 3

HCID 962WaterLösungsmittelHCID 6228DimethylformamideLösungsmittelHCID 6342AcetonitrileLösungsmittel

Versuchsvorschrift

A solution of 1-(6-chloro-2,3-dihydrobenzo[b][1,4]dioxin-8-yl)ethanamine (130 mg, 0.61 mmol), 2,4-difluoro-1-(methylsulfonyl)benzene (116 mg, 0.61 mmol) and diisopropylethylamine (314 mg, 2.43 mmol) in N,N-dimethylformamide (2 mL) was stirred at 110° C. for 16 h. The reaction was cooled to room temperature, poured over water and extracted with diethyl ether. The solvent was concentrated in vacuo to collect 53.4 mg of the desired product, which was used for the next reaction without further purification. A solution of N-(1-(6-chloro-2,3-dihydrobenzo[b][1,4]dioxin-8-yl)ethyl)-5-fluoro-2-(methylsulfonyl)benzenamine (53.4 mg, 0.14 mmol), piperazine (239 mg, 2.76 mmol) and N,N-diisopropylethylamine (0.25 mL, 1.38 mmol) in acetonitrile (2 mL) was stirred at reflux for 16 h. The reaction mixture was cooled down and concentrated under reduced pressure. The residue was taken up in dichloromethane, washed with water, dried and concentrated in vacuo. The crude product was purified by silica chromatography (10% ethyl acetate in hexanes) to yield 50 mg (80%) of desired product. 1H NMR (400 MHz, CDCl3): δ 7.58 (d, 1H), 6.82 (d, 1H), 6.76 (d, 1H), 6.60 (d, 1H), 6.23 (d, 1H), 5.87 (d, 1H), 4.73 (m, 1H), 4.28 (m, 4H), 3.24 (m, 4H), 3.05 (s, 3H), 3.03 (m, 4H), 1.54 (d, 3H); MS (ESI) m/z: 452.3 (M++1).

Aufarbeitung

  1. extractionextracted with diethyl ether
  2. concentrationThe solvent was concentrated in vacuo
  3. customto collect 53.4 mg of the desired product, which
  4. customwas used for the next reaction without further purification
  5. temperatureat reflux for 16 h
  6. temperatureThe reaction mixture was cooled down
  7. concentrationconcentrated under reduced pressure
  8. washwashed with water
  9. customdried
  10. concentrationconcentrated in vacuo
  11. customThe crude product was purified by silica chromatography (10% ethyl acetate in hexanes)

Quellen und Nachweise

ORD-Eintrag
ord-7bb9398d3dbe4794a886d8137c9567c8
Quelldatensatz
uspto-grants-2011_06
Patentnummer
US07968538B2

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