Ethylenediamine → 2-(5-chloro-indazol-1-yl)-5H-pyrrolo[2,3-b]pyrazine-7-carboxylic acid [(R)-2-(4-cyano-piperidin-1-yl)-1-cyclopropyl-2-oxo-ethyl]-amide

HRID 245958Notes

Reaction equation

HRID 245958 reaction equation
[C:1]([CH:3]1[CH2:8][CH2:7][N:6]([C:9](=[O:44])[C@H:10]([NH:14][C:15]([C:17]2[C:25]3[C:20](=[N:21][CH:22]=[C:23]([N:26]4[C:34]5[C:29](=[CH:30][C:31]([Cl:35])=[CH:32][CH:33]=5)[CH:28]=[N:27]4)[N:24]=3)[N:19](COCC[Si](C)(C)C)[CH:18]=2)=[O:16])[CH:11]2[CH2:13][CH2:12]2)[CH2:5][CH2:4]1)#[N:2].FC(F)(F)C(O)=O.C(N)CN>ClCCl>[C:1]([CH:3]1[CH2:4][CH2:5][N:6]([C:9](=[O:44])[C@H:10]([NH:14][C:15]([C:17]2[C:25]3[C:20](=[N:21][CH:22]=[C:23]([N:26]4[C:34]5[C:29](=[CH:30][C:31]([Cl:35])=[CH:32][CH:33]=5)[CH:28]=[N:27]4)[N:24]=3)[NH:19][CH:18]=2)=[O:16])[CH:11]2[CH2:13][CH2:12]2)[CH2:7][CH2:8]1)#[N:2]

Participants

5

Reactant 3

HCID 3301EthylenediamineHCID 6422Trifluoroacetic acidHCID 712888882-(5-chloro-indazol-1-yl)-5-(2-trimethylsilanyl-ethoxymethyl)-5H-pyrrolo[2,3-b]pyrazine-7-carboxylic acid [(R)-2-(4-cyano-piperidin-1-yl)-1-cyclopropyl-2-oxo-ethyl]-amide

Product 1

HCID 712887612-(5-chloro-indazol-1-yl)-5H-pyrrolo[2,3-b]pyrazine-7-carboxylic acid [(R)-2-(4-cyano-piperidin-1-yl)-1-cyclopropyl-2-oxo-ethyl]-amideYield 54.7%

Reagents, catalysts & solvents 1

HCID 6344DichloromethaneSolvent

Procedure

In a round-bottomed flask, 2-(5-chloro-indazol-1-yl)-5-(2-trimethylsilanylethoxymethyl)-5H-pyrrolo[2,3-b]pyrazine-7-carboxylic acid [(R)-2-(4-cyano-piperidin-1-yl)-1-cyclopropyl-2-oxo-ethyl]-amide (51 mg, 0.08 mmol) was dissolved in dichloromethane (0.5 ml) and trifluoroacetic acid (0.25 ml, 3.24 mmol) was added. The yellow reaction mixture was stirred at room temperature for 2.5 h then concentrated. The residue was dissolved in dichloromethane (0.5 ml) and ethylenediamine (0.33 ml, 4.89 mmol) was added. The reaction was stirred at room temperature for 1.5 h then quenched with water and extracted with EtOAc (2×30 ml). The combined organic layers were washed with water and brine then dried over sodium sulfate, filtered and concentrated. The residue was purified by chromatography over silica gel with EtOAc/hexanes (gradient 0-100% EtOAc) followed by trituration with EtOAc/hexanes (1:1) to provide 22 mg (52%) of 2-(5-chloro-indazol-1-yl)-5H-pyrrolo[2,3-b]pyrazine-7-carboxylic acid [(R)-2-(4-cyano-piperidin-1-yl)-1-cyclopropyl-2-oxo-ethyl]-amide as a yellow solid. MS: (M+H)+=503; 1H NMR (DMSO-d6, 300 MHz): δ (ppm) 13.01 (br. s., 1H), 9.10 (s, 1H), 8.94 (dd, J=8.9, 5.1 Hz, 1H), 8.54 (d, J=0.8 Hz, 1H), 8.51 (d, J=6.8 Hz, 1H), 8.29 (d, J=8.3 Hz, 1H), 8.07 (d, J=1.9 Hz, 1H), 7.56 (t, J=6.6 Hz, 1H), 4.92-5.02 (m, 1H), 3.70-4.06 (m, 2H), 3.09-3.68 (m, 3H), 1.50-2.08 (m, 4H), 1.20-1.39 (m, 1H), 0.31-0.61 (m, 4H).

Workup

  1. concentrationthen concentrated
  2. dissolutionThe residue was dissolved in dichloromethane (0.5 ml)
  3. stirringThe reaction was stirred at room temperature for 1.5 h
  4. customthen quenched with water
  5. extractionextracted with EtOAc (2×30 ml)
  6. washThe combined organic layers were washed with water and brine
  7. dry with materialthen dried over sodium sulfate
  8. filtrationfiltered
  9. concentrationconcentrated
  10. customThe residue was purified by chromatography over silica gel with EtOAc/hexanes (gradient 0-100% EtOAc)

Sources & evidence

ORD record
ord-55d3d42290d447cd8981e6037de9d1eb
Source dataset
uspto-grants-2014_02
Patent number
US08658646B2

Reaction notes

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