Trifluoroacetic acid → (1-methyl-cyclohexyl)-[2-(4-piperazin-1-yl-phenyl)-5H-pyrrolo[2,3-b]pyrazin-7-yl]-methanone

HRID 1677486

Reaction equation

HRID 1677486 reaction equation
C(OC([N:8]1[CH2:13][CH2:12][N:11]([C:14]2[CH:19]=[CH:18][C:17]([C:20]3[N:21]=[C:22]4[C:28]([C:29]([C:31]5([CH3:37])[CH2:36][CH2:35][CH2:34][CH2:33][CH2:32]5)=[O:30])=[CH:27][NH:26][C:23]4=[N:24][CH:25]=3)=[CH:16][CH:15]=2)[CH2:10][CH2:9]1)=O)(C)(C)C.C(O)(C(F)(F)F)=O>C(Cl)Cl>[CH3:37][C:31]1([C:29]([C:28]2[C:22]3[C:23](=[N:24][CH:25]=[C:20]([C:17]4[CH:18]=[CH:19][C:14]([N:11]5[CH2:12][CH2:13][NH:8][CH2:9][CH2:10]5)=[CH:15][CH:16]=4)[N:21]=3)[NH:26][CH:27]=2)=[O:30])[CH2:36][CH2:35][CH2:34][CH2:33][CH2:32]1

Participants

4

Reactant 2

HCID 6422Trifluoroacetic acidHCID 595406974-{4-[7-(1-Methyl-cyclohexanecarbonyl)-5H-pyrrolo[2,3-b]pyrazin-2-yl]-phenyl}-piperazine-1-carboxylic acid tert-butyl ester

Product 1

HCID 59540630(1-methyl-cyclohexyl)-[2-(4-piperazin-1-yl-phenyl)-5H-pyrrolo[2,3-b]pyrazin-7-yl]-methanoneYield 89.8%

Reagents, catalysts & solvents 1

HCID 6344DichloromethaneSolvent

Procedure

A solution of 4-{4-[7-(1-methyl-cyclohexanecarbonyl)-5H-pyrrolo[2,3-b]pyrazin-2-yl]-phenyl}-piperazine-1-carboxylic acid tert-butyl ester (35 mg, 0.069 mmol) in DCM (5 ml), at 0° C., was treated with TFA (0.15 ml, 2.01 mmol). The reaction mixture was stirred at room temperature for 16 hours, and then refluxed for 1.5 hours. The reaction mixture was concentrated to dryness, and the resulting residue was partitioned between sat. NaHCO3 and EtOAc. The organic layers were collected, dried over MgSO4, filtered, and concentrated providing 25 mg (89%) of (1-methyl-cyclohexyl)-[2-(4-piperazin-1-yl-phenyl)-5H-pyrrolo[2,3-b]pyrazin-7-yl]-methanone as a yellow solid. MP 214-216° C., M+H=404.

Workup

  1. temperaturerefluxed for 1.5 hours
  2. concentrationThe reaction mixture was concentrated to dryness
  3. customthe resulting residue was partitioned between sat. NaHCO3 and EtOAc
  4. customThe organic layers were collected
  5. dry with materialdried over MgSO4
  6. filtrationfiltered
  7. concentrationconcentrated

Sources & evidence

ORD record
ord-b2d2bcc3e66a475faac9e8023f573b8f
Source dataset
uspto-grants-2011_08
Patent number
US08008298B2

Linked notes

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