N-methyl-2-pyrrolidone → Methyl 3-(aminocarbonyl)-5-[(dipropylamino)carbonyl]benzoate

HRID 348790Notes

Reaction equation

HRID 348790 reaction equation
Br[C:2]1[CH:3]=[C:4]([CH:9]=[C:10]([C:12]([N:14]([CH2:18][CH2:19][CH3:20])[CH2:15][CH2:16][CH3:17])=[O:13])[CH:11]=1)[C:5]([O:7][CH3:8])=[O:6].C1(P(C2C=CC=CC=2)CCCP(C2C=CC=CC=2)C2C=CC=CC=2)C=CC=CC=1.C[Si](C)(C)N[Si](C)(C)C.C(N(C(C)C)CC)(C)C.C[N:69]1CCC[C:70]1=[O:74]>C([O-])(=O)C.[Pd+2].C([O-])(=O)C>[NH2:69][C:70]([C:2]1[CH:3]=[C:4]([CH:9]=[C:10]([C:12]([N:14]([CH2:18][CH2:19][CH3:20])[CH2:15][CH2:16][CH3:17])=[O:13])[CH:11]=1)[C:5]([O:7][CH3:8])=[O:6])=[O:74]

Participants

7

Reactant 5

HCID 13387N-methyl-2-pyrrolidoneHCID 13838HexamethyldisilazaneHCID 812191,3-Bis(diphenylphosphino)propaneHCID 81531DiisopropylethylamineHCID 21939662Methyl 3-bromo-5-(dipropylcarbamoyl)benzoate

Product 1

HCID 22593626Methyl 3-(aminocarbonyl)-5-[(dipropylamino)carbonyl]benzoate

Reagents, catalysts & solvents 1

HCID 167845palladium(II) acetateCatalyst

Conditions

Temperature
100 °C

Procedure

To a mixture of methyl 3-bromo-5-[(dipropylamino)carbonyl]benzoate (XXI, PREPARATION 3, 0.5 g, 1.47 mmol) in dry N-methylpyrrolidinone under a carbon monoxide atmosphere is added palladium (II) acetate (0.017 g, 0.074 mmol), 1,3-bis(diphenylphosphino)propane (0.045 g, 0.11 mmol), hexamethyldisilazane (1.0 mL, 4.7 mmol), and diisopropylethylamine (0.38 g, 2.94 mmol). The mixture is heated at 100 degrees C. for 24 hours. The mixture is cooled to 20–25 degrees C. and partitioned between water and ethyl acetate. The layers are separated and the aqueous phase is back-washed with ethyl acetate. The organic phases are combined and washed three times with saline, dried over anhydrous magnesium sulfate, filtered and concentrated. Column chromatography (silica gel, 75 mL; methanol/methylene chloride, 2.5/97.5) gives the title compound, NMR (CDCl3) delta 0.77, 1.02, 1.57, 1.71, 3.17, 3.49, 3.98, 5.78, 6.34, 8.07, 8.20 and 8.48.

Workup

  1. temperatureThe mixture is cooled to 20–25 degrees C
  2. customand partitioned between water and ethyl acetate
  3. customThe layers are separated
  4. washthe aqueous phase is back-washed with ethyl acetate
  5. washwashed three times with saline
  6. dry with materialdried over anhydrous magnesium sulfate
  7. filtrationfiltered
  8. concentrationconcentrated

Sources & evidence

ORD record
ord-699332e1dd034394a8f3812366249a19
Source dataset
uspto-grants-2007_02
Patent number
US07176242B2

Reaction notes

Loading…