Acetone → (R)-4-((R)-1-((6-(4-(4-isopropylpiperazin-1-yl)phenyl)-3-methyl-3H-imidazo[4,5-c]pyridin-4-yl)oxy)ethyl)pyrrolidin-2-one

HRID 2209075Notes

Reaction equation

HRID 2209075 reaction equation
[CH3:1][N:2]1[C:6]2[C:7]([O:23][C@@H:24]([C@H:26]3[CH2:30][NH:29][C:28](=[O:31])[CH2:27]3)[CH3:25])=[N:8][C:9]([C:11]3[CH:16]=[CH:15][C:14]([N:17]4[CH2:22][CH2:21][NH:20][CH2:19][CH2:18]4)=[CH:13][CH:12]=3)=[CH:10][C:5]=2[N:4]=[CH:3]1.[CH3:32][C:33]([CH3:35])=O.C(O[BH-](OC(=O)C)OC(=O)C)(=O)C.[Na+]>C1COCC1.C([O-])(O)=O.[Na+].CO>[CH:33]([N:20]1[CH2:19][CH2:18][N:17]([C:14]2[CH:13]=[CH:12][C:11]([C:9]3[N:8]=[C:7]([O:23][C@@H:24]([C@H:26]4[CH2:30][NH:29][C:28](=[O:31])[CH2:27]4)[CH3:25])[C:6]4[N:2]([CH3:1])[CH:3]=[N:4][C:5]=4[CH:10]=3)=[CH:16][CH:15]=2)[CH2:22][CH2:21]1)([CH3:35])[CH3:32]

Participants

7

Reactant 3

HCID 180AcetoneHCID 5049666Sodium triacetoxyborohydrideHCID 117844142(R)-4-((R)-1-(3-methyl-6-(4-(piperazin-1-yl)phenyl)-3H-imidazo[4,5-c]pyridin-4-yloxy)ethyl)pyrrolidin-2-one

Product 1

HCID 117843088(R)-4-((R)-1-((6-(4-(4-isopropylpiperazin-1-yl)phenyl)-3-methyl-3H-imidazo[4,5-c]pyridin-4-yl)oxy)ethyl)pyrrolidin-2-oneYield 59.5%

Reagents, catalysts & solvents 3

HCID 887MethanolSolventHCID 8028TetrahydrofuranSolventHCID 516892Sodium BicarbonateSolvent

Procedure

A mixture of (R)-4-((R)-1-(3-methyl-6-(4-(piperazin-1-yl)phenyl)-3H-imidazo[4,5-c]pyridin-4-yloxy)ethyl)pyrrolidin-2-one 3A.13 (29 mg, 0.069 mmol), acetone (18 μL, 0.24 mmol) and sodium triacetoxyborohydride (66 mg, 0.31 mmol) in THF (1.0 mL) was stirred at room temperature over the weekend. The reaction was diluted with saturated NaHCO3 (aq) and methanol. The mixture was concentrated to dryness and the residue was purified via prep HPLC (2-95% acetonitrile in water, 0.1% trifluoroacetic acid buffer) to isolate (R)-4-((R)-1-((6-(4-(4-isopropylpiperazin-1-yl)phenyl)-3-methyl-3H-imidazo[4,5-c]pyridin-4-yl)oxy)ethyl)pyrrolidin-2-one 3.35 (19 mg) as its trifluoroacetic acid salt.

Workup

  1. concentrationThe mixture was concentrated to dryness
  2. customthe residue was purified via prep HPLC (2-95% acetonitrile in water, 0.1% trifluoroacetic acid buffer)

Sources & evidence

ORD record
ord-02c7e3af42c04acaa92971ea27c62e5d
Source dataset
uspto-grants-2016_06
Patent number
US09376441B2

Reaction notes

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