1-Hydroxybenzotriazole → 2-(6-chloro-1-methyl-1H-indazol-3-yl)-5-(2-trimethylsilanyl-ethoxymethyl)-5H-pyrrolo[2,3-b]pyrazine-7-carboxylic acid ((R)-1-hydroxymethyl-propyl)-amide

HRID 246151Notes

Reaction equation

HRID 246151 reaction equation
[Cl:1][C:2]1[CH:10]=[C:9]2[C:5]([C:6]([C:12]3[N:13]=[C:14]4[C:20]([C:21](O)=[O:22])=[CH:19][N:18]([CH2:24][O:25][CH2:26][CH2:27][Si:28]([CH3:31])([CH3:30])[CH3:29])[C:15]4=[N:16][CH:17]=3)=[N:7][N:8]2[CH3:11])=[CH:4][CH:3]=1.[NH2:32][C@H:33]([CH2:36][CH3:37])[CH2:34][OH:35].CN(C(ON1N=NC2C=CC=CC1=2)=[N+](C)C)C.F[P-](F)(F)(F)(F)F.C1C=CC2N(O)N=NC=2C=1.C(N(CC)C(C)C)(C)C>CN(C=O)C>[OH:35][CH2:34][C@H:33]([NH:32][C:21]([C:20]1[C:14]2[C:15](=[N:16][CH:17]=[C:12]([C:6]3[C:5]4[C:9](=[CH:10][C:2]([Cl:1])=[CH:3][CH:4]=4)[N:8]([CH3:11])[N:7]=3)[N:13]=2)[N:18]([CH2:24][O:25][CH2:26][CH2:27][Si:28]([CH3:30])([CH3:31])[CH3:29])[CH:19]=1)=[O:22])[CH2:36][CH3:37]

Participants

7

Reactant 5

HCID 757711-HydroxybenzotriazoleHCID 81531DiisopropylethylamineHCID 27238562-Amino-1-butanol, (-)-HCID 2733084Methanaminium, N-((1H-benzotriazol-1-yloxy)(dimethylamino)methylene)-N-methyl-, hexafluorophosphate(1-) (1:1)HCID 712796712-(6-chloro-1-methyl-1H-indazol-3-yl)-5-(2-trimethylsilanyl-ethoxymethyl)-5H-pyrrolo[2,3-b]pyrazine-7-carboxylic acid

Product 1

HCID 712882722-(6-chloro-1-methyl-1H-indazol-3-yl)-5-(2-trimethylsilanyl-ethoxymethyl)-5H-pyrrolo[2,3-b]pyrazine-7-carboxylic acid ((R)-1-hydroxymethyl-propyl)-amideYield 61%

Reagents, catalysts & solvents 1

HCID 6228DimethylformamideSolvent

Procedure

A 25 mL round-bottomed flask was charged with 2-(6-chloro-1-methyl-1H-indazol-3-yl)-5-(2-trimethylsilanyl-ethoxymethyl)-5H-pyrrolo[2,3-b]pyrazine-7-carboxylic acid (0.10 g, 0.22 mmol), (R)-2-aminobutan-1-ol (65 mg, 0.73 mmol), HBTU (108 mg, 0.28 mmol), and HOBT (44 mg, 0.28 mmol). Then added DMF (1 mL) followed by N,N-diisopropylethylamine (0.11 mL, 0.66 mmol). The yellow reaction mixture was stirred at room temperature overnight then quenched with water and extracted with EtOAc (30 mL). The organic layer was washed once with saturated NaHCO3 and water. The combined aqueous layers were back extracted with EtOAc (25 mL). The combined organic layers was dried over sodium sulfate, filtered and concentrated. The residue was purified by chromatography over SiO2 with EtOAc/hexanes (gradient: 0-50% EtOAc) to afford 70 mg (61%) of 2-(6-chloro-1-methyl-1H-indazol-3-yl)-5-(2-trimethylsilanyl-ethoxymethyl)-5H-pyrrolo[2,3-b]pyrazine-7-carboxylic acid ((R)-1-hydroxymethyl-propyl)-amide as an off-white solid.

Workup

  1. customthen quenched with water
  2. extractionextracted with EtOAc (30 mL)
  3. washThe organic layer was washed once with saturated NaHCO3 and water
  4. extractionThe combined aqueous layers were back extracted with EtOAc (25 mL)
  5. dry with materialThe combined organic layers was dried over sodium sulfate
  6. filtrationfiltered
  7. concentrationconcentrated
  8. customThe residue was purified by chromatography over SiO2 with EtOAc/hexanes (gradient: 0-50% EtOAc)

Sources & evidence

ORD record
ord-630c316b3fe441bcbfee7aacd1633e9b
Source dataset
uspto-grants-2014_02
Patent number
US08658646B2

Reaction notes

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