Triethylamine → N-methoxy-N,3-dimethyl-4-nitrobenzamide

HRID 926461

Reaction equation

HRID 926461 reaction equation
C(N(CC)CC)C.[CH3:8][C:9]1[CH:10]=[C:11]([CH:15]=[CH:16][C:17]=1[N+:18]([O-:20])=[O:19])[C:12](O)=[O:13].Cl.[CH3:22][NH:23][O:24][CH3:25].CCN=C=NCCCN(C)C>C(Cl)Cl>[CH3:25][O:24][N:23]([CH3:22])[C:12](=[O:13])[C:11]1[CH:15]=[CH:16][C:17]([N+:18]([O-:20])=[O:19])=[C:9]([CH3:8])[CH:10]=1

Participants

6

Reactant 4

HCID 8471TriethylamineHCID 159081-Ethyl-3-(3'-dimethylaminopropyl)carbodiimideHCID 183703-Methyl-4-nitrobenzoic acidHCID 81138Methanamine, N-methoxy-, hydrochloride (1:1)

Product 1

HCID 46318653N-methoxy-N,3-dimethyl-4-nitrobenzamide

Reagents, catalysts & solvents 1

HCID 6344DichloromethaneSolvent

Procedure

Triethylamine (37.9 mL, 273 mmol) was added slowly to a mixture of 3-methyl-4-nitrobenzoic acid (25.0 g, 136 mmol), N,O-dimethylhydroxylamine hydrochloride (14.95 g, 150.3 mmol), and EDCI (31.40 g, 163.9 mmol) in DCM (171 mL). The mixture was stirred at room temperature overnight, quenched with saturated aqueous NaHCO3 and stirred at room temperature for 30 minutes. Water (50 mL) was added followed by additional DCM. The mixture was stirred for 10 minutes and layers were separated. The aqueous layer was again extracted with DCM. The combined organic layers were dried over MgSO4, then filtered. The solvent was removed and the residual oil chromatographed (0 to 20% EtOAc/DCM) to provide the title compound as a yellow oil.

Workup

  1. customquenched with saturated aqueous NaHCO3
  2. stirringstirred at room temperature for 30 minutes
  3. additionWater (50 mL) was added
  4. stirringThe mixture was stirred for 10 minutes
  5. customlayers were separated
  6. extractionThe aqueous layer was again extracted with DCM
  7. dry with materialThe combined organic layers were dried over MgSO4
  8. filtrationfiltered
  9. customThe solvent was removed
  10. customthe residual oil chromatographed (0 to 20% EtOAc/DCM)

Sources & evidence

ORD record
ord-756dc36076ee4ea598f058289d0fbdd5
Source dataset
uspto-grants-2016_03
Patent number
US09284308B2

Linked notes

Loading…