Cesium carbonate → 6-[4-(3,5-dimethyl-piperazin-1-yl)-phenyl]-3-ethyl-4-methoxy-1-phenyl-1H-pyrazolo[3,4-b]pyridine

HRID 68740

Reaction equation

HRID 68740 reaction equation
Br[C:2]1[CH:7]=[CH:6][C:5]([C:8]2[N:13](C)[C:12]3[N:15]([C:20]4[CH:25]=[CH:24][CH:23]=[CH:22][CH:21]=4)[N:16]=[C:17]([CH2:18][CH3:19])[C:11]=3[C:10](=[O:26])[CH:9]=2)=[CH:4][CH:3]=1.[CH3:27][CH:28]1[CH2:33][NH:32][CH2:31][CH:30]([CH3:34])[NH:29]1.[CH:35]1C=CC(P(C2C(C3C(P(C4C=CC=CC=4)C4C=CC=CC=4)=CC=C4C=3C=CC=C4)=C3C(C=CC=C3)=CC=2)C2C=CC=CC=2)=CC=1.C([O-])([O-])=O.[Cs+].[Cs+]>C1(C)C=CC=CC=1.CN(C=O)C.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].C1C=CC(P(C2C=CC=CC=2)[C-]2C=CC=C2)=CC=1.C1C=CC(P(C2C=CC=CC=2)[C-]2C=CC=C2)=CC=1.[Fe+2]>[CH3:34][CH:30]1[NH:29][CH:28]([CH3:27])[CH2:33][N:32]([C:2]2[CH:3]=[CH:4][C:5]([C:8]3[N:13]=[C:12]4[N:15]([C:20]5[CH:21]=[CH:22][CH:23]=[CH:24][CH:25]=5)[N:16]=[C:17]([CH2:18][CH3:19])[C:11]4=[C:10]([O:26][CH3:35])[CH:9]=3)=[CH:6][CH:7]=2)[CH2:31]1

Participants

8

Reactant 4

HCID 10796Cesium carbonateHCID 660562,6-DimethylpiperazineHCID 634876Binap, (A+-)-HCID 674488196-(4-bromophenyl)-3-ethyl-7-methyl-1-phenyl-1H-pyrazolo[3,4-b]pyridin-4(7H)-one

Product 1

HCID 584835716-[4-(3,5-dimethyl-piperazin-1-yl)-phenyl]-3-ethyl-4-methoxy-1-phenyl-1H-pyrazolo[3,4-b]pyridine

Reagents, catalysts & solvents 3

HCID 635956Ferrocene-1,1'-bis-(diphenylphosphine)CatalystHCID 9811564Bis(dibenzylideneacetone)palladiumCatalystHCID 21735183Dimethylformamide tolueneSolvent

Conditions

Temperature
120 °C

Procedure

Into a 50-mL round-bottom flask purged and maintained with an inert atmosphere of nitrogen, was placed a solution of 6-(4-bromophenyl)-3-ethyl-7-methyl-1-phenyl-1H-pyrazolo[3,4-b]pyridin-4(7H)-one (100 mg, 0.24 mmol, 1.00 equiv) in toluene/DMF (2 ml/Id), 2,6-dimethylpiperazine (140 mg, 1.23 mmol, 5.01 equiv), BINAP (15.3 mg, 0.02 mmol, 0.10 equiv), Pd2(dba)3 (22.4 mg, 0.02 mmol, 0.10 equiv), Cs2CO3 (140 mg, 0.73 mmol, 2.96 equiv), dppf (9.18 mg). The resulting solution was stirred overnight at 120° C. in an oil bath. The resulting mixture was concentrated under vacuum. The residue was applied onto a silica gel column with dichloromethane/methanol (200:1-100:1) to yield 6-[4-(3,5-dimethyl-piperazin-1-yl)-phenyl]-3-ethyl-4-methoxy-1-phenyl-1H-pyrazolo[3,4-b]pyridine as a yellow solid.

Workup

  1. customInto a 50-mL round-bottom flask purged
  2. temperaturemaintained with an inert atmosphere of nitrogen
  3. concentrationThe resulting mixture was concentrated under vacuum

Sources & evidence

ORD record
ord-988177dc72a240a68ef7f7ee98d29c80
Source dataset
uspto-grants-2014_09
Patent number
US08822447B2

Linked notes

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