Diisopropylethylamine → HCID 58575049, compound

HRID 1807834Notes

Reaction equation

HRID 1807834 reaction equation
[Cl:1][C:2]1[C:3]([NH:16][NH2:17])=[N:4][C:5]2[C:10]([N:11]=1)=[CH:9][C:8]([C:12]([O:14][CH3:15])=[O:13])=[CH:7][CH:6]=2.[O:18]1[CH2:23][CH2:22][CH:21]([C:24](O)=[O:25])[CH2:20][CH2:19]1.C(N(C(C)C)CC)(C)C.F[P-](F)(F)(F)(F)F.Br[P+](N1CCCC1)(N1CCCC1)N1CCCC1>O.CN(C)C=O>[Cl:1][C:2]1[C:3]([NH:16][NH:17][C:24]([CH:21]2[CH2:22][CH2:23][O:18][CH2:19][CH2:20]2)=[O:25])=[N:4][C:5]2[C:10]([N:11]=1)=[CH:9][C:8]([C:12]([O:14][CH3:15])=[O:13])=[CH:7][CH:6]=2

Participants

7

Reactant 4

HCID 81531DiisopropylethylamineHCID 219302Oxane-4-carboxylic acidHCID 2733179PyBroPHCID 57470539HCID 57470539, compound

Product 1

HCID 58575049HCID 58575049, compoundYield 99.7%

Reagents, catalysts & solvents 2

HCID 962WaterSolventHCID 6228DimethylformamideSolvent

Procedure

To a mixture of 100 mg of methyl 3-chloro-2-hydrazinoquinoxaline-6-carboxylate, 57 mg of tetrahydro-2H-pyran-4-carboxylic acid, 0.16 mL of diisopropylethylamine, and 1.0 mL of N,N-dimethylformamide was added 203 mg of bromo(tripyrrolidin-1-yl)phosphonium hexafluorophosphate, followed by stirring at room temperature overnight. To the reaction mixture was added water, followed by extraction with ethyl acetate. The organic layer was washed with saturated brine and dried over anhydrous magnesium sulfate, and then the solvent was evaporated under reduced pressure. The obtained residue was purified by silica gel column chromatography (chloroform/methanol) to obtain 144 mg of methyl 3-chloro-2-[2-(tetrahydro-2H-pyran-4-ylcarbonyl)hydrazino]quinoxaline-6-carboxylate.

Workup

  1. extractionfollowed by extraction with ethyl acetate
  2. washThe organic layer was washed with saturated brine
  3. dry with materialdried over anhydrous magnesium sulfate
  4. customthe solvent was evaporated under reduced pressure
  5. customThe obtained residue was purified by silica gel column chromatography (chloroform/methanol)

Sources & evidence

ORD record
ord-bd96440ebc614da7ad54e5491f7336a5
Source dataset
uspto-grants-2013_01
Patent number
US08357688B2

Reaction notes

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