2-Pyrazinecarboxylic acid → Methyl 2-(bis-(tert-butoxycarbonyl)amino)-3-(pyrazine-2-carboxamido)benzoate

HRID 520445Notes

Reaction equation

HRID 520445 reaction equation
[NH2:1][C:2]1[C:3]([N:12]([C:20]([O:22][C:23]([CH3:26])([CH3:25])[CH3:24])=[O:21])[C:13]([O:15][C:16]([CH3:19])([CH3:18])[CH3:17])=[O:14])=[C:4]([CH:9]=[CH:10][CH:11]=1)[C:5]([O:7][CH3:8])=[O:6].[N:27]1[CH:32]=[CH:31][N:30]=[CH:29][C:28]=1[C:33](O)=[O:34].CN(C(ON1N=NC2C=CC=NC1=2)=[N+](C)C)C.F[P-](F)(F)(F)(F)F.CCN(C(C)C)C(C)C>CN(C=O)C.O>[C:23]([O:22][C:20]([N:12]([C:13]([O:15][C:16]([CH3:19])([CH3:17])[CH3:18])=[O:14])[C:3]1[C:2]([NH:1][C:33]([C:28]2[CH:29]=[N:30][CH:31]=[CH:32][N:27]=2)=[O:34])=[CH:11][CH:10]=[CH:9][C:4]=1[C:5]([O:7][CH3:8])=[O:6])=[O:21])([CH3:26])([CH3:25])[CH3:24]

Participants

7

Reactant 4

HCID 10472-Pyrazinecarboxylic acidHCID 81531DiisopropylethylamineHCID 9886157Methanaminium, N-((dimethylamino)(3H-1,2,3-triazolo(4,5-b)pyridin-3-yloxy)methylene)-N-methyl-, hexafluorophosphate(1-) (1:1)HCID 58552839Methyl 3-amino-2-(bis(tert-butoxycarbonyl)amino)benzoate

Product 1

HCID 58552825Methyl 2-(bis-(tert-butoxycarbonyl)amino)-3-(pyrazine-2-carboxamido)benzoateYield 58.4%

Reagents, catalysts & solvents 2

HCID 962WaterSolventHCID 6228DimethylformamideSolvent

Procedure

A solution of methyl 3-amino-2-(bis(tert-butoxycarbonyl)amino)benzoate 13 (3.8 g, 10.4 mmol), pyrazine-2-carboxylic acid 10 (1.54 g, 12.5 mmol), HATU (7.9 g, 20.8 mmol) and DIPEA (2.68 g, 20.8 mmol) in DMF was heated at 50° C. for 12 h. The reaction mixture was poured into H2O and the resulting precipitate was collected by filtration and dried under vacuum. The crude residue was purified by flash chromatography to give 14 (2.87 g, 58% yield)

Workup

  1. filtrationthe resulting precipitate was collected by filtration
  2. customdried under vacuum
  3. customThe crude residue was purified by flash chromatography

Sources & evidence

ORD record
ord-75f2ef6ebe1d4488bc688f9e05dbe96f
Source dataset
uspto-grants-2016_05
Patent number
US09326986B2

Reaction notes

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