Methanesulfonic Acid → 6-Amino-N-[(4,6-dimethyl-2-oxo-1,2-dihydro-3-pyridinyl)methyl]-1-(1-methylethyl)-1H-pyrazolo[3,4-b]pyridine-4-carboxamide

HRID 475955Notes

Reaction equation

HRID 475955 reaction equation
[CH3:1][C:2]1[CH:7]=[C:6]([CH3:8])[NH:5][C:4](=[O:9])[C:3]=1[CH2:10][NH:11][C:12]([C:14]1[C:15]2[CH:26]=[N:25][N:24]([CH:27]([CH3:29])[CH3:28])[C:16]=2[N:17]=[C:18]([NH:20]CC=C)[CH:19]=1)=[O:13].CS(O)(=O)=O>C(O)C.C(Cl)Cl.[Pd]>[NH2:20][C:18]1[CH:19]=[C:14]([C:12]([NH:11][CH2:10][C:3]2[C:4](=[O:9])[NH:5][C:6]([CH3:8])=[CH:7][C:2]=2[CH3:1])=[O:13])[C:15]2[CH:26]=[N:25][N:24]([CH:27]([CH3:29])[CH3:28])[C:16]=2[N:17]=1

Participants

6

Reactant 2

HCID 6395Methanesulfonic AcidHCID 56597559N-[(4,6-Dimethyl-2-oxo-1,2-dihydro-3-pyridinyl)methyl]-1-(1-methylethyl)-6-(2-propen-1-ylamino)-1H-pyrazolo[3,4-b]pyridine-4-carboxamide

Product 1

HCID 565975586-Amino-N-[(4,6-dimethyl-2-oxo-1,2-dihydro-3-pyridinyl)methyl]-1-(1-methylethyl)-1H-pyrazolo[3,4-b]pyridine-4-carboxamide

Reagents, catalysts & solvents 3

HCID 23938PalladiumCatalystHCID 702EthanolSolventHCID 6344DichloromethaneSolvent

Procedure

A mixture of 10% Pd/C (0.200 g, 0.188 mmol) and N-[(4,6-dimethyl-2-oxo-1,2-dihydro-3-pyridinyl)methyl]-1-(1-methylethyl)-6-(2-propen-1-ylamino)-1H-pyrazolo[3,4-b]pyridine-4-carboxamide (0.200 g, 0.507 mmol) was suspended in ethanol (10 mL) and stirred. Added next was methanesulfonic acid (0.033 mL, 0.507 mmol), and the stirring contents were heated at reflux for 2 h. After cooling to room temperature, the reaction mixture was diluted with DCM and filtered through Celite. The filter pad was washed with 10% MeOH/DCM. The filtrate was pre-adsorped onto silica gel, and the crude product purified by silica gel chromatography (dry loaded, eluent: gradient of 5-80% Dichloromethane/Chloroform containing 10% 2M Ammonia (in methanol)). The collected product was dried in vacuum oven at 45° C. overnight. The final product was collected as 0.065 g (36%). LCMS E-S (M+H)=355.3. 1H NMR (400 MHz, DMSO-d6) δ ppm 1.40 (d, J=6.82 Hz, 6H), 2.12 (s, 3H), 2.21 (s, 3H), 4.31 (d, J=5.05 Hz, 2H), 4.85-5.00 (m, 1H), 5.89 (s, 1H), 6.49-6.68 (m, 3H), 7.85 (s, 1H), 8.46 (t, J=5.05 Hz, 1H), 11.54 (br. s., 1H).

Workup

  1. additionAdded next
  2. temperaturethe stirring contents were heated
  3. temperatureat reflux for 2 h
  4. filtrationfiltered through Celite
  5. washThe filter pad was washed with 10% MeOH/DCM
  6. customthe crude product purified by silica gel chromatography (dry loaded, eluent: gradient of 5-80% Dichloromethane/Chloroform containing 10% 2M Ammonia (in methanol))
  7. customThe collected product was dried in vacuum oven at 45° C. overnight
  8. customThe final product was collected as 0.065 g (36%)

Sources & evidence

ORD record
ord-88ec036e99c64519abeb027b5b604c2d
Source dataset
uspto-grants-2014_01
Patent number
US08637509B2

Reaction notes

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