Hydrochloric Acid → HCID 10647202, compound

HRID 1648271Notes

Reaction equation

HRID 1648271 reaction equation
C([O:3][C:4]([C:6]1[C:7]([CH2:30][N:31]2[CH:35]=[N:34][CH:33]=[N:32]2)=[N:8][C:9]2[C:14]([C:15]=1[C:16]1[CH:21]=[CH:20][C:19]([O:22][CH3:23])=[C:18]([O:24][CH3:25])[CH:17]=1)=[CH:13][C:12]([O:26][CH3:27])=[C:11]([O:28][CH3:29])[CH:10]=2)=[O:5])C.[OH-].[Na+].Cl>C(O)C>[CH3:27][O:26][C:12]1[CH:13]=[C:14]2[C:9](=[CH:10][C:11]=1[O:28][CH3:29])[N:8]=[C:7]([CH2:30][N:31]1[CH:35]=[N:34][CH:33]=[N:32]1)[C:6]([C:4]([OH:5])=[O:3])=[C:15]2[C:16]1[CH:21]=[CH:20][C:19]([O:22][CH3:23])=[C:18]([O:24][CH3:25])[CH:17]=1

Participants

5

Reactant 3

HCID 313Hydrochloric AcidHCID 14798Sodium HydroxideHCID 153980TAK-603

Product 1

HCID 10647202HCID 10647202, compoundYield 46%

Reagents, catalysts & solvents 1

HCID 702EthanolSolvent

Procedure

A mixture of 6,7-dimethoxy-4-(3,4-dimethoxyphenyl)-2-(1,2,4-triazol-1-ylmethyl)quinoline-3-carboxylic acid ethyl ester (3.0 g), 2N sodium hydroxide (15.6 ml) and ethanol (50 ml) was stirred under refluxing conditions for 8 hours. The reaction mixture was cooled with ice and adjusted to pH 5 with 2N hydrochloric acid, after which it was concentrated under reduced pressure. The residue was dissolved in ethanol, and the insoluble substances were filtered off. After the filtrate was concentrated, the residual oily substance was subjected to silica gel column chromatography and eluted with chloroform-methanol (4:1, v/v) to yield 6,7-dimethoxy-4-(3,4-dimethoxyphenyl)-2-(1,2,4-triazol- 1-ylmethyl)quinoline-3-carboxylic acid (1.3 g, 46%), which was then recrystallized from dichloromethane-ethanol to yield a colorless prismatic crystal having a melting point of 270° to 271° C. (decomposed).

Workup

  1. temperatureThe reaction mixture was cooled with ice
  2. concentrationafter which it was concentrated under reduced pressure
  3. dissolutionThe residue was dissolved in ethanol
  4. filtrationthe insoluble substances were filtered off
  5. concentrationAfter the filtrate was concentrated
  6. washeluted with chloroform-methanol (4:1

Sources & evidence

ORD record
ord-70535f60efca4034b2d804a9621fab04
Source dataset
uspto-grants-1995_07
Patent number
US05436247

Reaction notes

Loading…