Trifluoroacetic acid → (Z)-2-[(1H-pyrrolo[2,3-b]pyridin-3-yl)methylene]-6-methoxy-7-(piperazin-1-ylmethyl)benzofuran-3(2H)-one

HRID 1749828Notes

Reaction equation

HRID 1749828 reaction equation
[NH:1]1[C:5]2=[N:6][CH:7]=[CH:8][CH:9]=[C:4]2[C:3](/[CH:10]=[C:11]2\[O:12][C:13]3[C:20]([CH2:21][N:22]4[CH2:27][CH2:26][N:25](C(OC(C)(C)C)=O)[CH2:24][CH2:23]4)=[C:19]([O:35][CH3:36])[CH:18]=[CH:17][C:14]=3[C:15]\2=[O:16])=[CH:2]1.FC(F)(F)C(O)=O>C(Cl)Cl>[NH:1]1[C:5]2=[N:6][CH:7]=[CH:8][CH:9]=[C:4]2[C:3](/[CH:10]=[C:11]2\[O:12][C:13]3[C:20]([CH2:21][N:22]4[CH2:23][CH2:24][NH:25][CH2:26][CH2:27]4)=[C:19]([O:35][CH3:36])[CH:18]=[CH:17][C:14]=3[C:15]\2=[O:16])=[CH:2]1

Participants

4

Reactant 2

HCID 6422Trifluoroacetic acidHCID 60155880tert-butyl (Z)-4-({2-[(1H-pyrrolo[2,3-b]pyridin-3-yl)methylene]-6-methoxy-3-oxo-2,3-dihydrobenzofuran-7-yl}methyl)piperazine-1-carboxylate

Product 1

HCID 54576042(Z)-2-[(1H-pyrrolo[2,3-b]pyridin-3-yl)methylene]-6-methoxy-7-(piperazin-1-ylmethyl)benzofuran-3(2H)-oneYield 97.8%

Reagents, catalysts & solvents 1

HCID 6344DichloromethaneSolvent

Procedure

A solution of tert-butyl (Z)-4-({2-[(1H-pyrrolo[2,3-b]pyridin-3-yl)methylene]-6-methoxy-3-oxo-2,3-dihydrobenzofuran-7-yl}methyl)piperazine-1-carboxylate (0.0645 g, 0.131 mmol) in methylene chloride (1 mL) was added with trifluoroacetic acid (1 mL), and the mixture was stirred overnight at room temperature. The reaction mixture was concentrated, and then added with saturated aqueous sodium hydrogencarbonate (6 mL), and the mixture was extracted five times with ethyl acetate. The organic layer was dried over anhydrous sodium sulfate, and then the solvent was evaporated to obtain the objective (Z)-2-[(1H-pyrrolo[2,3-b]pyridin-3-yl)methylene]-6-methoxy-7-(piperazin-1-ylmethyl)benzofuran-3(2H)-one (0.0500 g, 97%).

Workup

  1. concentrationThe reaction mixture was concentrated
  2. additionadded with saturated aqueous sodium hydrogencarbonate (6 mL)
  3. extractionthe mixture was extracted five times with ethyl acetate
  4. dry with materialThe organic layer was dried over anhydrous sodium sulfate
  5. customthe solvent was evaporated

Sources & evidence

ORD record
ord-da962920a12e430a83a08ebe57e85b88
Source dataset
uspto-grants-2015_10
Patent number
US09156827B2

Reaction notes

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