1,1'-(9,9-Dimethyl-9H-xanthene-4,5-diyl)bis(1,1-diphenylphosphine) → 1-[4-(3,3-Difluoropyrrolidin-1-yl)-2-fluorophenyl]-5-methoxy-3-(1-phenyl-1H-pyrazol-5-yl)pyridazin-4(1H)-one

HRID 1624793Notes

Reaction equation

HRID 1624793 reaction equation
FC(F)(F)S(O[C:7]1[CH:12]=[CH:11][C:10]([N:13]2[CH:18]=[C:17]([O:19][CH3:20])[C:16](=[O:21])[C:15]([C:22]3[N:26]([C:27]4[CH:32]=[CH:31][CH:30]=[CH:29][CH:28]=4)[N:25]=[CH:24][CH:23]=3)=[N:14]2)=[C:9]([F:33])[CH:8]=1)(=O)=O.Cl.[F:37][C:38]1([F:43])[CH2:42][CH2:41][NH:40][CH2:39]1.CC1(C)C2C(=C(P(C3C=CC=CC=3)C3C=CC=CC=3)C=CC=2)OC2C(P(C3C=CC=CC=3)C3C=CC=CC=3)=CC=CC1=2.CC([O-])(C)C.[Na+]>O1CCOCC1.C1C=CC(/C=C/C(/C=C/C2C=CC=CC=2)=O)=CC=1.C1C=CC(/C=C/C(/C=C/C2C=CC=CC=2)=O)=CC=1.C1C=CC(/C=C/C(/C=C/C2C=CC=CC=2)=O)=CC=1.[Pd].[Pd].O>[F:37][C:38]1([F:43])[CH2:42][CH2:41][N:40]([C:7]2[CH:12]=[CH:11][C:10]([N:13]3[CH:18]=[C:17]([O:19][CH3:20])[C:16](=[O:21])[C:15]([C:22]4[N:26]([C:27]5[CH:32]=[CH:31][CH:30]=[CH:29][CH:28]=5)[N:25]=[CH:24][CH:23]=4)=[N:14]3)=[C:9]([F:33])[CH:8]=2)[CH2:39]1

Participants

8

Reactant 4

HCID 6360441,1'-(9,9-Dimethyl-9H-xanthene-4,5-diyl)bis(1,1-diphenylphosphine)HCID 23676156Sodium t-butoxideHCID 249034823,3-Difluoropyrrolidine hydrochlorideHCID 580722213-fluoro-4-[5-methoxy-4-oxo-3-(1-phenyl-1H-pyrazol-5-yl)pyridazin-1(4H)-yl]phenyl trifluoromethanesulfonate

Product 1

HCID 580722001-[4-(3,3-Difluoropyrrolidin-1-yl)-2-fluorophenyl]-5-methoxy-3-(1-phenyl-1H-pyrazol-5-yl)pyridazin-4(1H)-oneYield 11.2%

Reagents, catalysts & solvents 3

HCID 9811564Bis(dibenzylideneacetone)palladiumCatalystHCID 962WaterSolventHCID 312751,4-DioxaneSolvent

Conditions

Temperature
90 °C

Procedure

A suspension of 3-fluoro-4-[5-methoxy-4-oxo-3-(1-phenyl-1H-pyrazol-5-yl)pyridazin-1(4H)-yl]phenyl trifluoromethanesulfonate (204 mg, 0.4 mmol), 3,3-difluoropyrrolidine hydrochloride (71.8 mg, 0.5 mmol), Pd2(dba)3 (9.2 mg, 0.01 mmol), Xantphos (23.1 mg, 0.04 mmol), and NaOtBu (96.1 mg, 1.0 mmol) in 1,4-dioxane (2 mL) was stirred for 3 h at 90° C. under Ar atmosphere. The reaction mixture was poured into water and extracted with AcOEt. The extract was washed with brine, dried over MgSO4, and concentrated under reduced pressure. The residue was subjected to basic silica gel column chromatography followed by purification by preparative HPLC. Recrystallization from MeOH/H2O gave the title compound (21.0 mg, 11% yield) as a yellow solid: mp 195-197° C.; 1H NMR (300 MHz, CDCl3): δ ppm 2.46-2.60 (2H, m), 3.52 (2H, t, J=7.2 Hz), 3.66 (2H, t, J=12.8 Hz), 3.89 (3H, s), 6.09 (1H, dd, J=2.6, 9.0 Hz), 6.23 (1H, dd, J=2.6, 13.9 Hz), 6.33 (1H, t, J=9.0 Hz), 7.25 (1H, J=1.9 Hz), 7.33-7.44 (5H, m), 7.71 (1H, d, J=2.3 Hz), 7.77 (1H, d, J=2.3 Hz). LC-MS (ESI) m/z 468 [M+H]+. Anal. Calcd for C24H20F3N5O2: C, 61.67; H, 4.31; N, 14.98. Found: C, 61.51; H, 4.38; N, 14.89.

Workup

  1. extractionextracted with AcOEt
  2. washThe extract was washed with brine
  3. dry with materialdried over MgSO4
  4. concentrationconcentrated under reduced pressure
  5. customfollowed by purification by preparative HPLC
  6. customRecrystallization from MeOH/H2O

Sources & evidence

ORD record
ord-58f90c89ac3a4da79a57d39a1fdebe38
Source dataset
uspto-grants-2014_07
Patent number
US08778944B2

Reaction notes

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