Dipropylamine → Methyl 3-bromo-5-(dipropylcarbamoyl)benzoate

HRID 1760984Notes

Reaction equation

HRID 1760984 reaction equation
C(C1NC=CN=1)(C1NC=CN=1)=O.[Br:13][C:14]1[CH:15]=[C:16]([CH:20]=[C:21]([C:23]([O:25][CH3:26])=[O:24])[CH:22]=1)[C:17]([OH:19])=O.[CH2:27]([NH:30][CH2:31][CH2:32][CH3:33])[CH2:28][CH3:29]>C1COCC1>[Br:13][C:14]1[CH:22]=[C:21]([CH:20]=[C:16]([C:17]([N:30]([CH2:31][CH2:32][CH3:33])[CH2:27][CH2:28][CH3:29])=[O:19])[CH:15]=1)[C:23]([O:25][CH3:26])=[O:24]

Participants

5

Reactant 3

HCID 8902DipropylamineHCID 5250894Bis-(1H-imidazol-2-YL)-methanoneHCID 225936413-Bromo-5-(methoxycarbonyl)benzoic acid

Product 1

HCID 21939662Methyl 3-bromo-5-(dipropylcarbamoyl)benzoate

Reagents, catalysts & solvents 1

HCID 8028TetrahydrofuranSolvent

Procedure

Carbonyl diimidazole (3.0 g, 18 mmol) is added to a solution of 3-bromo-5-(methoxycarbonyl)benzoic acid (XIX, PREPARATION 2, 3.9 g, 15 mmol) in THF (30 mL). The mixture is stirred for 0.5 hours. Dipropylamine (AMINE, 4.2 mL, 30 mmol) is added to the mixture, which is then stirred for 24 hours. The solvent is then removed under reduced pressure and the mixture is partitioned between ethyl acetate and water. The organic phase is then washed with saline, dried over anhydrous magnesium sulfate, filtered, and concentrated. Column chromatography (silica gel; ethyl acetate/hexanes, 15/85) gives the title compound, IR (diffuse reflectance) 2968, 2958, 1714, 1637, 1479, 1440, 1422, 1321, 1310, 1288, 1273, 1252, 889, 772 and 718 cm−1; NMR (300 MHz, CDCl3) δ8.21, 7.96, 7.70, 3.95, 3.46, 3.15, 1.69, 1.57, 1.00 and 0.78; MS (ESI+) for C15H20BrNO3 m/z (M+H)+=344.1.

Workup

  1. stirringis then stirred for 24 hours
  2. customThe solvent is then removed under reduced pressure
  3. customthe mixture is partitioned between ethyl acetate and water
  4. washThe organic phase is then washed with saline
  5. dry with materialdried over anhydrous magnesium sulfate
  6. filtrationfiltered
  7. concentrationconcentrated

Sources & evidence

ORD record
ord-0b1fb6c15acb4348a1d7bcc1fe4d4eee
Source dataset
uspto-grants-2005_01
Patent number
US06846813B2

Reaction notes

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