Trifluoroacetic acid → 2-(3-piperidin-4-yl-indazol-1-yl)-5H-pyrrolo[2,3-b]pyrazine-7-carboxylic acid (2-hydroxy-1,1-dimethyl-ethyl)-amide

HRID 246521Notes

Reaction equation

HRID 246521 reaction equation
[OH:1][CH2:2][C:3]([NH:6][C:7]([C:9]1[C:17]2[C:12](=[N:13][CH:14]=[C:15]([N:18]3[C:26]4[C:21](=[CH:22][CH:23]=[CH:24][CH:25]=4)[C:20]([CH:27]4[CH2:32][CH2:31][N:30](C(OC(C)(C)C)=O)[CH2:29][CH2:28]4)=[N:19]3)[N:16]=2)[N:11](COCC[Si](C)(C)C)[CH:10]=1)=[O:8])([CH3:5])[CH3:4].FC(F)(F)C(O)=O>ClCCl>[OH:1][CH2:2][C:3]([NH:6][C:7]([C:9]1[C:17]2[C:12](=[N:13][CH:14]=[C:15]([N:18]3[C:26]4[C:21](=[CH:22][CH:23]=[CH:24][CH:25]=4)[C:20]([CH:27]4[CH2:32][CH2:31][NH:30][CH2:29][CH2:28]4)=[N:19]3)[N:16]=2)[NH:11][CH:10]=1)=[O:8])([CH3:5])[CH3:4]

Participants

4

Reactant 2

HCID 6422Trifluoroacetic acidHCID 71280186tert-butyl 4-(1-(7-(1-hydroxy-2-methylpropan-2-ylcarbamoyl)-5-((2-(trimethylsilyl)ethoxy)methyl)-5H-pyrrolo[2,3-b]pyrazin-2-yl)-1H-indazol-3-yl)piperidine-1-carboxylate

Product 1

HCID 712837552-(3-piperidin-4-yl-indazol-1-yl)-5H-pyrrolo[2,3-b]pyrazine-7-carboxylic acid (2-hydroxy-1,1-dimethyl-ethyl)-amideYield 98%

Reagents, catalysts & solvents 1

HCID 6344DichloromethaneSolvent

Procedure

To a stirred solution of tert-butyl 4-(1-(7-(1-hydroxy-2-methylpropan-2-ylcarbamoyl)-5-((2-(trimethylsilyl)ethoxy)methyl)-5H-pyrrolo[2,3-b]pyrazin-2-yl)-1H-indazol-3-yl)piperidine-1-carboxylate (22 mg, 33.1 μmol) in dichloromethane (2 mL) was added trifluoroacetic acid (0.5 mL). After 15 h then mixture was concentrated in vacuo then 25 mL of a Jan. 10, 1960 mixture of ammonium hydroxide/methanol/dichloromethane added. After 1 h the mixture was concentrated in vacuo. Purification by chromatography (silica, 24 g Analogix column, 0-5% methanol containing 10% ammonium hydroxide in dichloromethane) gave 2-(3-piperidin-4-yl-indazol-1-yl)-5H-pyrrolo[2,3-b]pyrazine-7-carboxylic acid (2-hydroxy-1,1-dimethyl-ethyl)-amide (14 mg, 98%). MS (M+H)+=434; 1H NMR (DMSO-d6) δ: 8.98 (s, 1H), 8.63 (d, J=8.5 Hz, 1H), 8.37 (s, 1H), 8.01 (d, J=8.1 Hz, 1H), 7.65 (s, 1H), 7.57 (t, J=7.8 Hz, 1H), 7.30-7.41 (m, 1H), 3.61 (s, 4H), 3.20 (br. s., 3H), 2.80-2.93 (m, 2H), 1.88-2.12 (m, 2H), 1.43 (s, 6H).

Workup

  1. concentrationmixture was concentrated in vacuo
  2. addition10, 1960 mixture of ammonium hydroxide/methanol/dichloromethane
  3. additionadded
  4. concentrationAfter 1 h the mixture was concentrated in vacuo
  5. customPurification by chromatography (silica, 24 g Analogix column, 0-5% methanol containing 10% ammonium hydroxide in dichloromethane)

Sources & evidence

ORD record
ord-17ffc5f1200a43ce9e159d1cfd9a5daa
Source dataset
uspto-grants-2014_02
Patent number
US08658646B2

Reaction notes

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