4-Aminophenol → HCID 178520042, compound

HRID 1862170Notes

Reaction equation

HRID 1862170 reaction equation
[CH:1]([C:3]1[C:11]2[C:6](=[CH:7][C:8]([C:12]([OH:14])=O)=[CH:9][CH:10]=2)[NH:5][N:4]=1)=[O:2].[NH2:15][C:16]1[CH:21]=[CH:20][C:19]([OH:22])=[CH:18][CH:17]=1.CN(C(ON1N=NC2C=CC=NC1=2)=[N+](C)C)C.F[P-](F)(F)(F)(F)F.C(N(CC)CC)C>CN(C)C=O>[OH:22][C:19]1[CH:20]=[CH:21][C:16]([NH:15][C:12]([C:8]2[CH:7]=[C:6]3[C:11]([C:3]([CH:1]=[O:2])=[N:4][NH:5]3)=[CH:10][CH:9]=2)=[O:14])=[CH:17][CH:18]=1

Participants

6

Reactant 4

HCID 4034-AminophenolHCID 8471TriethylamineHCID 9886157Methanaminium, N-((dimethylamino)(3H-1,2,3-triazolo(4,5-b)pyridin-3-yloxy)methylene)-N-methyl-, hexafluorophosphate(1-) (1:1)HCID 178520043HCID 178520043, compound

Product 1

HCID 178520042HCID 178520042, compound

Reagents, catalysts & solvents 1

HCID 6228DimethylformamideSolvent

Procedure

To a solution of 3-formyl-1H-indazole-6-carboxylic acid (1.6 g, 8.4 mmol) and 4-aminophenol (1.8 g, 16.8 mmol) in dry dimethylformamide (35 mL) was added HATU (3.8 g, 16.8 mmol) followed by triethylamine (1.4 mL, 10.1 mmol). The reaction was stirred at room and monitored by TLC and LC/MS. After two hours the reaction was complete. The solvent was removed by vacuum and the product was purified by flash column chromatography using ethyl acetate: petroleum ether 1:1 to pure ethyl acetate. N-(4-Hydroxyphenyl)-3-formyl-1H-indazole-6-carboxamide was isolated as a tan colored solid. 1H NMR (DMSO-d6) δ 6.79 (2H, d, 8.9 Hz), 7.59 (2H, d, 8.9 Hz), 7.94 (1H, d, 9.8 Hz), 8.24 (1H, d, 8.2 Hz), 8.31 (1H, s), 9.31 (1H, br s), 10.27 (2H, s) (APCI pos) 282.1.

Workup

  1. customThe solvent was removed by vacuum
  2. customthe product was purified by flash column chromatography

Sources & evidence

ORD record
ord-a8e322212cca4659b7c8f8ded7c21c3a
Source dataset
uspto-grants-2003_03
Patent number
US06534524B1

Reaction notes

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