Salicylaldehyde oxime → HCID 46848916, compound

HRID 1624838Notes

Reaction equation

HRID 1624838 reaction equation
[F:1][C:2]1[CH:7]=[C:6](I)[CH:5]=[CH:4][C:3]=1[N:9]1[CH:14]=[C:13]([O:15][CH3:16])[C:12](=[O:17])[C:11]([C:18]2[N:22]([C:23]3[CH:28]=[CH:27][CH:26]=[CH:25][CH:24]=3)[N:21]=[CH:20][CH:19]=2)=[N:10]1.[Cl:29][C:30]1[CH:31]=[N:32][NH:33][CH:34]=1.C(=NO)C1C(=CC=CC=1)O.C([O-])([O-])=O.[Cs+].[Cs+]>CC#N.O>[Cl:29][C:30]1[CH:31]=[N:32][N:33]([C:6]2[CH:5]=[CH:4][C:3]([N:9]3[CH:14]=[C:13]([O:15][CH3:16])[C:12](=[O:17])[C:11]([C:18]4[N:22]([C:23]5[CH:28]=[CH:27][CH:26]=[CH:25][CH:24]=5)[N:21]=[CH:20][CH:19]=4)=[N:10]3)=[C:2]([F:1])[CH:7]=2)[CH:34]=1

Participants

7

Reactant 4

HCID 7200Salicylaldehyde oximeHCID 10796Cesium carbonateHCID 275241H-Pyrazole, 4-chloro-HCID 594362141-(2-fluoro-4-iodophenyl)-5-methoxy-3-(1-phenyl-1H-pyrazol-5-yl)pyridazin-4(1H)-one

Product 1

HCID 46848916HCID 46848916, compoundYield 15%

Reagents, catalysts & solvents 2

HCID 962WaterSolventHCID 6342AcetonitrileSolvent

Procedure

A suspension of 1-(2-fluoro-4-iodophenyl)-5-methoxy-3-(1-phenyl-1H-pyrazol-5-yl)pyridazin-4(1H)-one (488 mg, 1.0 mmol), 4-chloro-1H-pyrazole (103 mg, 1.0 mmol), Cu2O (14.3 mg, 0.1 mmol), salicylaldoxime (54.9 mg, 0.4 mmol), and Cs2CO3 (652 mg, 2.0 mmol) in CH3CN (10 mL) was refluxed overnight under Ar atmosphere. After cooling to room temperature, 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 eluting with AcOEt followed by purification by preparative HPLC. Recrystallization from MeOH/H2O gave the title compound (68.1 mg, 15% yield) as a pale yellow powder: mp 190-192° C.; 1H NMR (300 MHz, CDCl3): δ ppm 3.92 (3H, s), 6.43 (1H, t, J=9.0 Hz), 7.23 (1H, ddd, J=1.1, 2.3, 9.0 Hz), 7.35 (1H, d, J=1.9 Hz), 7.36-7.48 (5H, m), 7.57 (1H, dd, J=2.6, 12.4 Hz), 7.68 (1H, s), 7.79 (1H, d, J=1.9 Hz), 7.82 (1H, d, J=2.3 Hz), 7.92 (1H, d, J=0.8 Hz). LC-MS (ESI) m/z 463 [M+H]+. Anal. Calcd for C23H16ClFN6O2: C, 59.68; H, 3.48; N, 18.16. Found: C, 59.81; H, 3.50; N, 18.14.

Workup

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

Sources & evidence

ORD record
ord-b3a905d6ddc0490f971010d3dbb5fade
Source dataset
uspto-grants-2014_07
Patent number
US08778944B2

Reaction notes

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