Triethylamine → Methyl 3-[(3-bromonaphthalene-1-carbonyl)amino]-2,4-dimethyl-benzoate

HRID 239986Notes

Reaction equation

HRID 239986 reaction equation
[Br:1][C:2]1[CH:3]=[C:4]([C:12]([OH:14])=O)[C:5]2[C:10]([CH:11]=1)=[CH:9][CH:8]=[CH:7][CH:6]=2.[NH2:15][C:16]1[C:17]([CH3:27])=[C:18]([CH:23]=[CH:24][C:25]=1[CH3:26])[C:19]([O:21][CH3:22])=[O:20].C(N(CC)CC)C.CCCP1(OP(CCC)(=O)OP(CCC)(=O)O1)=O>C(Cl)Cl.O>[Br:1][C:2]1[CH:3]=[C:4]([C:12]([NH:15][C:16]2[C:17]([CH3:27])=[C:18]([CH:23]=[CH:24][C:25]=2[CH3:26])[C:19]([O:21][CH3:22])=[O:20])=[O:14])[C:5]2[C:10]([CH:11]=1)=[CH:9][CH:8]=[CH:7][CH:6]=2

Participants

7

Reactant 4

HCID 8471TriethylamineHCID 111923Propylphosphonic anhydrideHCID 117086093-Bromonaphthalene-1-carboxylic acidHCID 66871802Methyl 3-amino-2,4-dimethylbenzoate

Product 1

HCID 86707371Methyl 3-[(3-bromonaphthalene-1-carbonyl)amino]-2,4-dimethyl-benzoateYield 88.2%

Reagents, catalysts & solvents 2

HCID 962WaterSolventHCID 6344DichloromethaneSolvent

Procedure

To a solution of 3-bromo-1-naphthoic acid (0.40 g, 1.59 mmol) in CH2Cl2 (8 mL) at 0° C. are added methyl 3-amino-2,4-dimethylbenzoate (0.26 g, 1.43 mmol, see preparation 10) and triethylamine (0.78 ml, 5.38 mmol). After stirring the reaction mixture for 10 minutes, 1-propanephosphonic acid cyclic anhydride (50% solution in ethyl acetate, 2.03 ml, 3.18 mmol) is added via syringe and stirred at room temperature. After 16 hours, the reaction is diluted with water and extracted with ethyl acetate. The organic layers are combined and dried over magnesium sulfate, filtered, and concentrated under reduced pressure. The resulting residue is purified by flash chromatography (silica gel) with 5% EtOAc in hexane as eluent to afford the product as a white solid (0.52 g, 79%). Mass spectrum (m/z): 412.3 (M+1).

Workup

  1. stirringstirred at room temperature
  2. waitAfter 16 hours
  3. extractionextracted with ethyl acetate
  4. dry with materialdried over magnesium sulfate
  5. filtrationfiltered
  6. concentrationconcentrated under reduced pressure
  7. customThe resulting residue is purified by flash chromatography (silica gel) with 5% EtOAc in hexane as eluent

Sources & evidence

ORD record
ord-999bd03f82174b789ffc72ecb2c5b2b5
Source dataset
uspto-grants-2014_02
Patent number
US08642768B2

Reaction notes

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