Trifluoroacetic acid → N-tert-butyl-2-(3-(1-hydroxyethyl)phenylamino)-5H-pyrrolo[2,3-b]pyrazine-7-carboxamide

HRID 522993Notes

Reaction equation

HRID 522993 reaction equation
[C:1]([NH:5][C:6]([C:8]1[C:16]2[C:11](=[N:12][CH:13]=[C:14]([NH:17][C:18]3[CH:23]=[CH:22][CH:21]=[C:20]([CH:24]([OH:26])[CH3:25])[CH:19]=3)[N:15]=2)[N:10](COCC[Si](C)(C)C)[CH:9]=1)=[O:7])([CH3:4])([CH3:3])[CH3:2].FC(F)(F)C(O)=O>ClCCl>[C:1]([NH:5][C:6]([C:8]1[C:16]2[C:11](=[N:12][CH:13]=[C:14]([NH:17][C:18]3[CH:23]=[CH:22][CH:21]=[C:20]([CH:24]([OH:26])[CH3:25])[CH:19]=3)[N:15]=2)[NH:10][CH:9]=1)=[O:7])([CH3:4])([CH3:2])[CH3:3]

Participants

4

Reactant 2

HCID 6422Trifluoroacetic acidHCID 90040619N-tert-butyl-2-(3-(1-hydroxyethyl)phenylamino)-5-((2-(trimethylsilyl)ethoxy)methyl)-5H-pyrrolo[2,3-b]pyrazine-7-carboxamide

Product 1

HCID 73295948N-tert-butyl-2-(3-(1-hydroxyethyl)phenylamino)-5H-pyrrolo[2,3-b]pyrazine-7-carboxamideYield 53%

Reagents, catalysts & solvents 1

HCID 6344DichloromethaneSolvent

Procedure

N-tert-Butyl-2-(3-(1-hydroxyethyl)phenylamino)-5-((2-(trimethylsilyl)ethoxy)methyl)-5H-pyrrolo[2,3-b]pyrazine-7-carboxamide (143 mg, 296 mol) was dissolved in dichloromethane (4.5 mL) and treated with trifluoroacetic acid (674 mg, 456 μL, 5.91 mmol). The mixture was stirred at room temperature for 16 h. The mixture was concentrated then re-dissolved in dichloromethane (4 mL), methanol (3 mL) and ammonium hydroxide (0.7 mL) and the mixture stirred at room temperature for 2 h. The reaction mixture was concentrated then purified by chromatography (silica, methanol in dichloromethane) gave N-tert-butyl-2-(3-(1-hydroxyethyl)phenylamino)-5H-pyrrolo[2,3-b]pyrazine-7-carboxamide (55 mg, 156 μmol, 53%) as a yellow solid. 1H NMR (400 MHz, DMSO-d) δ ppm: 12.29 (s, 1H), 9.44 (s, 1H), 8.00 (s, 1H), 7.99 (s, 1H), 7.98 (d, J=2.8, 1 H), 7.78 (s, 1H), 7.19 (m, 2H), 6.91 (d, J=7.5, 1 H), 5.17 (d, J=4.0, 1 H), 4.70 (m, 1H), 3.38 (q, J=7.2, 1 H), 1.43 (s, 9H), 1.34 (d. J=6.3, 3 H), 1.09 (t, J=7.2, 1 H); MS (EI/CI) m/z: 354.2 [M+H].

Workup

  1. concentrationThe mixture was concentrated
  2. dissolutionthen re-dissolved in dichloromethane (4 mL)
  3. stirringmethanol (3 mL) and ammonium hydroxide (0.7 mL) and the mixture stirred at room temperature for 2 h
  4. concentrationThe reaction mixture was concentrated
  5. customthen purified by chromatography (silica, methanol in dichloromethane)

Sources & evidence

ORD record
ord-cbbee76bb50c4800928ee0ec0b684438
Source dataset
uspto-grants-2016_05
Patent number
US09334278B2

Reaction notes

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