Dicyclohexylcarbodiimide → {3-[3-(2-methoxy-phenyl)-1H-pyrazolo[3,4-b]pyridin-5-yl]-phenyl}-(4-methyl-piperazin-1-yl)-methanone

HRID 1171112Notes

Reaction equation

HRID 1171112 reaction equation
[CH3:1][O:2][C:3]1[CH:8]=[CH:7][CH:6]=[CH:5][C:4]=1[C:9]1[C:17]2[C:12](=[N:13][CH:14]=[C:15]([C:18]3[CH:19]=[C:20]([CH:24]=[CH:25][CH:26]=3)[C:21](O)=[O:22])[CH:16]=2)[NH:11][N:10]=1.C1CCC(N=C=NC2CCCCC2)CC1.[CH3:42][N:43]1[CH2:48][CH2:47][NH:46][CH2:45][CH2:44]1>CN(C=O)C>[CH3:1][O:2][C:3]1[CH:8]=[CH:7][CH:6]=[CH:5][C:4]=1[C:9]1[C:17]2[C:12](=[N:13][CH:14]=[C:15]([C:18]3[CH:19]=[C:20]([C:21]([N:46]4[CH2:47][CH2:48][N:43]([CH3:42])[CH2:44][CH2:45]4)=[O:22])[CH:24]=[CH:25][CH:26]=3)[CH:16]=2)[NH:11][N:10]=1

Participants

5

Reactant 3

HCID 10868DicyclohexylcarbodiimideHCID 531671-MethylpiperazineHCID 178489390HCID 178489390, compound

Product 1

HCID 178489388{3-[3-(2-methoxy-phenyl)-1H-pyrazolo[3,4-b]pyridin-5-yl]-phenyl}-(4-methyl-piperazin-1-yl)-methanoneYield 6%

Reagents, catalysts & solvents 1

HCID 6228DimethylformamideSolvent

Conditions

Temperature
60 °C

Procedure

To a solution of 3-[3-(2-methoxy-phenyl)-1H-pyrazolo[3,4-b]pyridin-5-yl]-benzoic acid (25 mg, 72 μmol) in anhydrous DMF (1.5 mL) was added PS-DCC resin (Argonaut Technologies) (180 mg, 0.22 mmol, 1.21 mmol·g−1) and N-methylpiperazine (9.6 μl, 86 μmol). The resulting mixture was stirred at 60° C. for 16 h. The resin was filtered off, washing with dichloromethane and ether and the filtrate concentrated. The residue was dissolved in dichloromethane and treated with a PS-trisamine resin (Argonaut Technologies) (20 mg). The resin was again removed by filtration and washed with dichloromethane and ether. The filtrate was concentrated and the resulting crude product was purified by reverse phase mass-triggered HPLC using a gradient of acetonitrile in water containing 0.1% of formic acid to afford {3-[3-(2-methoxy-phenyl)-1H-pyrazolo[3,4-b]pyridin-5-yl]-phenyl}-(4-methyl-piperazin-1-yl)-methanone (1.7 mg, 4.0 μmol, 6% yield). 1H-NMR (500 MHz, d6-DMSO) δ 8.87 (d, 1H), 8.37 (d, 1H), 8.24 (t, 1H), 8.02 (dt, 1H), 7.98 (dt, 1H), 7.68 (dd, 1H), 7.64 (t, 1H), 7.47 (ddd, 1H), 7.23 (d, 1H), 7.11 (dt, 1H), 3.86 (s, 3H). MS: m/z 346 [MH+].

Workup

  1. filtrationThe resin was filtered off
  2. washwashing with dichloromethane and ether
  3. concentrationthe filtrate concentrated
  4. dissolutionThe residue was dissolved in dichloromethane
  5. additiontreated with a PS-trisamine resin (Argonaut Technologies) (20 mg)
  6. customThe resin was again removed by filtration
  7. washwashed with dichloromethane and ether
  8. concentrationThe filtrate was concentrated
  9. customthe resulting crude product was purified by reverse phase mass-triggered HPLC

Sources & evidence

ORD record
ord-f7caad72e46a4cf4b845abcf72af6560
Source dataset
uspto-grants-2010_11
Patent number
US07829558B2

Reaction notes

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