Trifluoroacetic acid → HCID 71279404, compound

HRID 246480Notes

Reaction equation

HRID 246480 reaction equation
[C:1]([NH:5][C:6]([C:8]1[C:16]2[C:11](=[N:12][CH:13]=[C:14]([N:17]3[C:25]4[C:20](=[CH:21][C:22]([F:27])=[C:23]([F:26])[CH:24]=4)[CH:19]=[N:18]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]([N:17]3[C:25]4[C:20](=[CH:21][C:22]([F:27])=[C:23]([F:26])[CH:24]=4)[CH:19]=[N:18]3)[N:15]=2)[NH:10][CH:9]=1)=[O:7])([CH3:4])([CH3:2])[CH3:3]

Participants

4

Reactant 2

HCID 6422Trifluoroacetic acidHCID 71280013HCID 71280013, compound

Product 1

HCID 71279404HCID 71279404, compoundYield 16.2%

Reagents, catalysts & solvents 1

HCID 6344DichloromethaneSolvent

Procedure

To a stirred solution of N-tert-butyl-2-(5,6-difluoro-1H-indazol-1-yl)-5-((2-(trimethylsilyl)ethoxy)methyl)-5H-pyrrolo[2,3-b]pyrazine-7-carboxamide (120 mg, 240 μmol) in dichloromethane (3 mL) was added trifluoroacetic acid (1 mL). After 15 h, the 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 to 4% of a solution of methanol containing 10% ammonium hydroxide)/dichloromethane gave 2-(5,6-difluoro-indazol-1-yl)-5H-pyrrolo[2,3-b]pyrazine-7-carboxylic acid tert-butylamide (14.4 mg, 16%). MS: (M+H)+=371; 1H NMR (DMSO-d6) δ: 9.02 (s, 1H), 8.53-8.60 (m, 2H), 8.44 (s, 1H), 8.06 (dd, J=10.0, 7.8 Hz, 1H), 7.56 (s, 1H), 1.50 (s, 9H).

Workup

  1. concentrationthe mixture 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 to 4% of a solution of methanol containing 10% ammonium hydroxide)/dichloromethane

Sources & evidence

ORD record
ord-2411203d1f08425a85cb04f6f0be4a3a
Source dataset
uspto-grants-2014_02
Patent number
US08658646B2

Reaction notes

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