Hydrochloric Acid → HCID 22175084, compound

HRID 584708Notes

Reaction equation

HRID 584708 reaction equation
Br[C:2]1[CH:7]=[C:6]([Br:8])[N:5]=[C:4]([C:9]([O:11]C)=[O:10])[C:3]=1[O:13][CH2:14][C:15]1[CH:20]=[CH:19][CH:18]=[CH:17][CH:16]=1.[C:21](=O)([O-])[O-:22].[K+].[K+].CO.Cl>O>[Br:8][C:6]1[N:5]=[C:4]([C:9]([OH:11])=[O:10])[C:3]([O:13][CH2:14][C:15]2[CH:20]=[CH:19][CH:18]=[CH:17][CH:16]=2)=[C:2]([O:22][CH3:21])[CH:7]=1

Participants

6

Reactant 4

HCID 313Hydrochloric AcidHCID 887MethanolHCID 11430Potassium CarbonateHCID 22175074Methyl 3-(benzyloxy)-4,6-dibromopicolinate

Product 1

HCID 22175084HCID 22175084, compoundYield 95.3%

Reagents, catalysts & solvents 1

HCID 962WaterSolvent

Procedure

A vigorously stirred mixture of 15 (25.5 g), potassium carbonate (75 g) and methanol (300 mL) was heated at reflux for 30 hours. The mixture was cooled, poured into water (800 mL), and the pH adjusted to 2 by the addition of conc. HCl. The resulting mixture was extracted with CH2Cl2 (3×150 mL). The organic extracts were combined, dried (MgSO4) and the solvent was evaporated to give a nearly colorless oil (20.5 g) which slowly solidified upon standing. This was recrystallized from methanol (125 mL)/water (40 mL) to give the desired acid 16 (11.6 g), m.p. 134-135° C.

Workup

  1. temperaturewas heated
  2. temperatureat reflux for 30 hours
  3. temperatureThe mixture was cooled
  4. extractionThe resulting mixture was extracted with CH2Cl2 (3×150 mL)
  5. dry with materialdried (MgSO4)
  6. customthe solvent was evaporated

Sources & evidence

ORD record
ord-159353f94c514149aa8d8dbc1b0a7742
Source dataset
uspto-grants-2005_08
Patent number
US06927225B2

Reaction notes

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