Trimethylamine → Methyl 3-[[5-bromo-2-(trifluoromethyl)benzoyl]amino]-2,4-dimethyl-benzoate

HRID 1427141Notes

Reaction equation

HRID 1427141 reaction equation
[Br:1][C:2]1[CH:3]=[CH:4][C:5]([C:11]([F:14])([F:13])[F:12])=[C:6]([CH:10]=1)[C:7]([OH:9])=O.N[C:16]1(C)[CH:25]=[C:24](C)[CH:23]=[C:18]([C:19]([O:21][CH3:22])=[O:20])[CH2:17]1.C[N:29]([CH3:31])C.[CH3:32]CCP1(OP(CCC)(=O)OP(CCC)(=O)O1)=O>C(Cl)Cl>[Br:1][C:2]1[CH:3]=[CH:4][C:5]([C:11]([F:14])([F:13])[F:12])=[C:6]([CH:10]=1)[C:7]([NH:29][C:31]1[C:17]([CH3:32])=[C:18]([CH:23]=[CH:24][C:25]=1[CH3:16])[C:19]([O:21][CH3:22])=[O:20])=[O:9]

Participants

6

Reactant 4

HCID 1146TrimethylamineHCID 111923Propylphosphonic anhydrideHCID 509981405-Bromo-2-trifluoromethylbenzoic acidHCID 86707353Methyl 3-amino-3,5-dimethylbenzoate

Product 1

HCID 86707375Methyl 3-[[5-bromo-2-(trifluoromethyl)benzoyl]amino]-2,4-dimethyl-benzoateYield 56.5%

Reagents, catalysts & solvents 1

HCID 6344DichloromethaneSolvent2×

Procedure

To a solution of 5-bromo-2-(trifluoromethyl)benzoic acid (1.0 g, 3.53 mmol) in CH2Cl2 (6 ml) at room temperature are added methyl 3-amino-3,5-dimethylbenzoate (0.44 g, 2.47 mmol, see preparation 12) and trimethylamine (1.0 ml, 7.06 mmol). After stirring the reaction mixture for 10 minutes, 1-propanephosphonic acid cyclic anhydride (50% solution in ethyl acetate, 5.6 ml, 8.83 mmol) is added via syringe. After 14 hours at ambient temperature, the reaction mixture is diluted with CH2Cl2, washed with water and brine. The organic layers are combined and dried over anhydrous Na2SO4, filtered, and concentrated under reduced pressure. The resulting residue is purified by flash chromatography (silica gel) using 20% ethyl acetate in hexanes to give the title compound as a white solid (0.6 g, 39%).

Workup

  1. waitAfter 14 hours at ambient temperature
  2. washwashed with water and brine
  3. dry with materialdried over anhydrous Na2SO4
  4. filtrationfiltered
  5. concentrationconcentrated under reduced pressure
  6. customThe resulting residue is purified by flash chromatography (silica gel)

Sources & evidence

ORD record
ord-a123dec21bf14a27916ce78c16a42179
Source dataset
uspto-grants-2015_01
Patent number
US08933098B2

Reaction notes

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