Trifluoroacetic acid → 2-(6-fluoro-1-methyl-1H-indazol-3-yl)-5H-pyrrolo[2,3-b]pyrazine-7-carboxylic acid [(R)-1-(1-cyano-cyclopentyl)-ethyl]-amide

HRID 246064Notes

Reaction equation

HRID 246064 reaction equation
[C:1]([C:3]1([C@H:8]([NH:10][C:11]([C:13]2[C:21]3[C:16](=[N:17][CH:18]=[C:19]([C:22]4[C:30]5[C:25](=[CH:26][C:27]([F:31])=[CH:28][CH:29]=5)[N:24]([CH3:32])[N:23]=4)[N:20]=3)[N:15](COCC[Si](C)(C)C)[CH:14]=2)=[O:12])[CH3:9])[CH2:7][CH2:6][CH2:5][CH2:4]1)#[N:2].C(O)(C(F)(F)F)=O>C(Cl)Cl>[C:1]([C:3]1([C@H:8]([NH:10][C:11]([C:13]2[C:21]3[C:16](=[N:17][CH:18]=[C:19]([C:22]4[C:30]5[C:25](=[CH:26][C:27]([F:31])=[CH:28][CH:29]=5)[N:24]([CH3:32])[N:23]=4)[N:20]=3)[NH:15][CH:14]=2)=[O:12])[CH3:9])[CH2:4][CH2:5][CH2:6][CH2:7]1)#[N:2]

Participants

4

Reactant 2

HCID 6422Trifluoroacetic acidHCID 712889182-(6-fluoro-1-methyl-1H-indazol-3-yl)-5-(2-trimethylsilanyl-ethoxymethyl)-5H-pyrrolo[2,3-b]pyrazine-7-carboxylic acid [(R)-1-(1-cyano-cyclopentyl)-ethyl]-amide

Product 1

HCID 712859282-(6-fluoro-1-methyl-1H-indazol-3-yl)-5H-pyrrolo[2,3-b]pyrazine-7-carboxylic acid [(R)-1-(1-cyano-cyclopentyl)-ethyl]-amideYield 86%

Reagents, catalysts & solvents 1

HCID 6344DichloromethaneSolvent

Procedure

To a solution of 2-(6-fluoro-1-methyl-1H-indazol-3-yl)-5-(2-trimethylsilanylethoxymethyl)-5H-pyrrolo[2,3-b]pyrazine-7-carboxylic acid [(R)-1-(1-cyano-cyclopentyl)-ethyl]-amide (140 mg, 0.25 mmol) in CH2Cl2 (2 mL) was added TFA (0.75 mL). The reaction mixture was stirred at room temperature for 4 h then concentrated. The residue was redissolved in 10:90:0.5 MeOH/CH2Cl2/NH4OH (3 mL) and stirred at room temperature for 3 h then concentrated. The residue was purified by silica gel chromatography with 0% to 5% MeOH/EtOAc to afford 92 mg (86%) of 2-(6-fluoro-1-methyl-1H-indazol-3-yl)-5H-pyrrolo[2,3-b]pyrazine-7-carboxylic acid [(R)-1-(1-cyano-cyclopentyl)-ethyl]-amide as a light yellow powder. MS (M+Na)+=454; mp=300-315° C.; 1H NMR (DMSO-d6, 300 MHz): δ (ppm) 12.96 (br. s., 1H), 9.11 (s, 1H), 8.51-8.56 (m, 1H), 8.50 (s, 1H), 8.19 (d, J=9.1 Hz, 1H), 7.67 (dd, J=9.8, 1.9 Hz, 1H), 7.15 (td, J=9.1, 2.3 Hz, 1H), 4.34-4.50 (m, 1H), 4.14 (s, 3H), 1.92-2.14 (m, 3H), 1.63-1.90 (m, 5H), 1.46 (d, J=6.8 Hz, 3H).

Workup

  1. concentrationthen concentrated
  2. dissolutionThe residue was redissolved in 10:90:0.5 MeOH/CH2Cl2/NH4OH (3 mL)
  3. stirringstirred at room temperature for 3 h
  4. concentrationthen concentrated
  5. customThe residue was purified by silica gel chromatography with 0% to 5% MeOH/EtOAc

Sources & evidence

ORD record
ord-b1635fa466274ddc99e7c68e62d0fba1
Source dataset
uspto-grants-2014_02
Patent number
US08658646B2

Reaction notes

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