1-Methylpiperazine → N-(3-ethyl-1-((6-methylpyridin-2-yl)methyl)-1H-indazol-4-yl)-7-(2-(4-methylpiperazin-1-yl)ethyl)imidazo[1,2-a]pyridine-3-carboxamide

HRID 79448Notes

Reaction equation

HRID 79448 reaction equation
[CH2:1]([C:3]1[C:11]2[C:6](=[CH:7][CH:8]=[CH:9][C:10]=2[NH:12][C:13]([C:15]2[N:19]3[CH:20]=[CH:21][C:22]([CH2:24][CH:25]=O)=[CH:23][C:18]3=[N:17][CH:16]=2)=[O:14])[N:5]([CH2:27][C:28]2[CH:33]=[CH:32][CH:31]=[C:30]([CH3:34])[N:29]=2)[N:4]=1)[CH3:2].[CH3:35][N:36]1[CH2:41][CH2:40][NH:39][CH2:38][CH2:37]1.C(O[BH-](OC(=O)C)OC(=O)C)(=O)C.[Na+]>C(Cl)Cl.C(O)(=O)C>[CH2:1]([C:3]1[C:11]2[C:6](=[CH:7][CH:8]=[CH:9][C:10]=2[NH:12][C:13]([C:15]2[N:19]3[CH:20]=[CH:21][C:22]([CH2:24][CH2:25][N:39]4[CH2:40][CH2:41][N:36]([CH3:35])[CH2:37][CH2:38]4)=[CH:23][C:18]3=[N:17][CH:16]=2)=[O:14])[N:5]([CH2:27][C:28]2[CH:33]=[CH:32][CH:31]=[C:30]([CH3:34])[N:29]=2)[N:4]=1)[CH3:2]

Participants

6

Reactant 3

HCID 531671-MethylpiperazineHCID 5049666Sodium triacetoxyborohydrideHCID 86672219N-(3-ethyl-1-((6-methylpyridin-2-yl)methyl)-1H-indazol-4-yl)-7-(2-oxoethyl)imidazo[1,2-a]pyridine-3-carboxamide

Product 1

HCID 67259922N-(3-ethyl-1-((6-methylpyridin-2-yl)methyl)-1H-indazol-4-yl)-7-(2-(4-methylpiperazin-1-yl)ethyl)imidazo[1,2-a]pyridine-3-carboxamide

Reagents, catalysts & solvents 2

HCID 176Acetic AcidCatalystHCID 6344DichloromethaneSolvent

Procedure

The crude N-(3-Ethyl-1-((6-methylpyridin-2-yl)methyl)-1H-indazol-4-yl)-7-(2-oxoethyl)imidazo[1,2-a]pyridine-3-carboxamide (112 mg, 0.248 mmol), and N-methylpiperazine (25 mg, 0.25 mmol) were dissolved in DCM (5 mL), and treated with 10 equivalents of sodium triacetoxyborohydride, followed by 2 drops of glacial acetic acid. The reaction mixture was stirred at ambient temperature for 48 hours. The reaction mixture was concentrated, and resuspended in saturated aqueous sodium carbonate. The mixture was extracted with DCM and EtOAc, the combined organic layers were dried over anhydrous sodium sulfate, then filtered and concentrated. Purification of the crude material by preparative thin-layer chromatography on silica with 7N NH3-MeOH/MeOH/DCM, 2/8/98 as eluent afforded 83.5 mg of a foamy, white solid. MS (ES+APCI) m/z=537 (M+H) detected.

Workup

  1. concentrationThe reaction mixture was concentrated
  2. extractionThe mixture was extracted with DCM and EtOAc
  3. dry with materialthe combined organic layers were dried over anhydrous sodium sulfate
  4. filtrationfiltered
  5. concentrationconcentrated
  6. customPurification of the crude material by preparative thin-layer chromatography on silica with 7N NH3-MeOH/MeOH/DCM, 2/8/98 as eluent
  7. customafforded 83.5 mg of a foamy, white solid

Sources & evidence

ORD record
ord-e986213dbc9b48e9b207312767d2eda2
Source dataset
uspto-grants-2014_09
Patent number
US08841455B2

Reaction notes

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