Sodium Hydroxide → 2,3-Quinolinedicarboxylic acid

HRID 542271

Reaction equation

HRID 542271 reaction equation
[N:1]1[C:10]2[C:5](=[CH:6][CH:7]=[CH:8][CH:9]=2)[CH:4]=[C:3]([C:11]([O:13]CC)=[O:12])[C:2]=1[C:16]([O:18]CC)=[O:17].[OH-].[Na+]>C(O)C.O>[N:1]1[C:10]2[C:5](=[CH:6][CH:7]=[CH:8][CH:9]=2)[CH:4]=[C:3]([C:11]([OH:13])=[O:12])[C:2]=1[C:16]([OH:18])=[O:17]

Participants

5

Reactant 2

HCID 14798Sodium HydroxideHCID 10880272Diethyl 2,3-quinolinedicarboxylate

Product 1

HCID 695082,3-Quinolinedicarboxylic acid

Reagents, catalysts & solvents 2

HCID 702EthanolSolventHCID 962WaterSolvent

Procedure

To a solution of diethyl 2,3-quinolinedicarboxylate (0.162 mol) in ethanol (150 mL) is added a solution of sodium hydroxide (0.50 mol) in water (400 mL). The mixture is heated at reflux for five hours, and the ethanol then removed by distillation at atmospheric pressure. The solution is cooled in an ice bath, diluted with water (100 mL), and acidified with concentrated hydrochloric acid, added in small increments. The precipitate is filtered, washed with water, and air dried to afford the desired 2,3-quinolinedicarboxylic acid as the trihydrate; mp 271°-277° C.

Workup

  1. temperatureThe mixture is heated
  2. temperatureat reflux for five hours
  3. customthe ethanol then removed by distillation at atmospheric pressure
  4. temperatureThe solution is cooled in an ice bath
  5. additiondiluted with water (100 mL)
  6. additionadded in small increments
  7. filtrationThe precipitate is filtered
  8. washwashed with water, and air
  9. customdried

Sources & evidence

ORD record
ord-82078cd114684e7c8d424ab1b33955cc
Source dataset
uspto-grants-1987_04
Patent number
US04656283

Linked notes

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