Triphenylphosphine → 6-[4-[4-[2-(1-methyl-1H-pyrazol-5-yl)ethoxy]phenyl]piperazin-1-yl]-3-(trifluoromethyl)[1,2,4]triazolo[4,3-b]pyridazine

HRID 2381112Notizen

Reaktionsgleichung

Reaktionsgleichung von HRID 2381112
CC(OC(/N=N/C(OC(C)C)=O)=O)C.[F:15][C:16]([F:40])([F:39])[C:17]1[N:21]2[N:22]=[C:23]([N:26]3[CH2:31][CH2:30][N:29]([C:32]4[CH:37]=[CH:36][C:35]([OH:38])=[CH:34][CH:33]=4)[CH2:28][CH2:27]3)[CH:24]=[CH:25][C:20]2=[N:19][N:18]=1.[CH3:41][N:42]1[C:46]([CH2:47][CH2:48]OC2C=CC(C3CCN(C4CCC5N(C(C(F)(F)F)=NN=5)N=4)CC3)=CC=2)=[CH:45][CH:44]=[N:43]1.C1(P(C2C=CC=CC=2)C2C=CC=CC=2)C=CC=CC=1>C1COCC1>[CH3:41][N:42]1[C:46]([CH2:47][CH2:48][O:38][C:35]2[CH:36]=[CH:37][C:32]([N:29]3[CH2:28][CH2:27][N:26]([C:23]4[CH:24]=[CH:25][C:20]5[N:21]([C:17]([C:16]([F:15])([F:39])[F:40])=[N:18][N:19]=5)[N:22]=4)[CH2:31][CH2:30]3)=[CH:33][CH:34]=2)=[CH:45][CH:44]=[N:43]1

Komponenten

6

Edukt 4

HCID 11776TriphenylphosphineHCID 5363146Diisopropyl azodicarboxylateHCID 300088374-[4-[3-(Trifluoromethyl)[1,2,4]triazolo[4,3-b]pyridazin-6-yl]piperazin-1-yl]phenolHCID 468938506-[4-[4-[2-(1-methyl-1H-pyrazol-5-yl)ethoxy]phenyl]piperidin-1-yl]-3-(trifluoromethyl)-7,8-dihydro[1,2,4]triazolo[4,3-b]pyridazine

Produkt 1

HCID 441259726-[4-[4-[2-(1-methyl-1H-pyrazol-5-yl)ethoxy]phenyl]piperazin-1-yl]-3-(trifluoromethyl)[1,2,4]triazolo[4,3-b]pyridazineAusbeute 69,3 %

Reagenzien, Katalysatoren, Lösungsmittel 1

HCID 8028TetrahydrofuranLösungsmittel

Versuchsvorschrift

DIAD (20.73 mL, 105.27 mmol) was added dropwise to 4-[4-[3-(trifluoromethyl)[1,2,4]triazolo[4,3-b]pyridazin-6-yl]piperazin-1-yl]phenol (32.0 g, 87.72 mmol), 2-(1-methyl-1H-pyrazol-5-yl)ethanol (obtained as described in Example 15, preparation of starting materials) (16.6 g, 131.58 mmol) and triphenylphosphine (34.5 g, 131.58 mmol) in THF (320 mL) at 0° C. under nitrogen. The resulting solution was stirred at ambient temperature for 3 days. The reaction mixture was evaporated to dryness and re-dissolved in DCM (700 mL), and the solution was washed sequentially with 2M NaOH (200 mL×2) and saturated brine (200 mL). The organic layer was dried over MgSO4, filtered and evaporated to afford crude product. The crude product was purified by flash silica chromatography, eluting with a gradient of 80 to 100% EtOAc in isohexane followed by EtOAc, then a gradient of 0 to 3% MeOH in DCM. Pure fractions were evaporated to dryness to afford 6-[4-[4-[2-(1-methyl-1H-pyrazol-5-yl)ethoxy]phenyl]piperazin-1-yl]-3-(trifluoromethyl)[1,2,4]triazolo[4,3-b]pyridazine (28.7 g, 69.3%) as a solid.

Aufarbeitung

  1. customThe reaction mixture was evaporated to dryness
  2. dissolutionre-dissolved in DCM (700 mL)
  3. washthe solution was washed sequentially with 2M NaOH (200 mL×2) and saturated brine (200 mL)
  4. dry with materialThe organic layer was dried over MgSO4
  5. filtrationfiltered
  6. customevaporated
  7. customto afford crude product
  8. customThe crude product was purified by flash silica chromatography
  9. washeluting with a gradient of 80 to 100% EtOAc in isohexane
  10. customPure fractions were evaporated to dryness

Quellen und Nachweise

ORD-Eintrag
ord-2a3c72a95f394f47b82e5b2e7e7d155b
Quelldatensatz
uspto-grants-2012_09
Patentnummer
US08258140B2

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