Hydrochloric Acid → 10-(2-Hydroxy-3,4-dimethoxy-6-methylphenyl)decanoic acid

HRID 647039Notes

Reaction equation

HRID 647039 reaction equation
[OH:1][C:2]1[C:20]([O:21][CH3:22])=[C:19]([O:23][CH3:24])[CH:18]=[C:17]([CH3:25])[C:3]=1[C:4]([CH2:6][CH2:7][CH2:8][CH2:9][CH2:10][CH2:11][CH2:12][CH2:13][C:14]([OH:16])=[O:15])=O.C1(C)C=CC=CC=1.Cl>O>[OH:1][C:2]1[C:20]([O:21][CH3:22])=[C:19]([O:23][CH3:24])[CH:18]=[C:17]([CH3:25])[C:3]=1[CH2:4][CH2:6][CH2:7][CH2:8][CH2:9][CH2:10][CH2:11][CH2:12][CH2:13][C:14]([OH:16])=[O:15]

Participants

5

Reactant 3

HCID 313Hydrochloric AcidHCID 1140TolueneHCID 12906133HCID 12906133, compound

Product 1

HCID 1290613810-(2-Hydroxy-3,4-dimethoxy-6-methylphenyl)decanoic acid

Reagents, catalysts & solvents 1

HCID 962WaterSolvent

Procedure

9-(2'-Hydroxy-3',4'-dimethoxy-6'-methylbenzoyl)nonanoic acid (formula II-1, wherein R=H3CO, X=H, Y=OH, n=8, in the free form) (0.254 part), zinc amalgam (0.56 part), toluene (1 volume part), 35% hydrochloric acid (0.5 volume part) and a small proportion of water were refluxed for 5 hours. The toluene layer was separated and the water layer was extracted with diethyl ether. The toluene layer was combined with the ethereal layer, washed with water and dried. The solvents were then distilled off under reduced pressure and the residue was recrystallized from ligroine. The foregoing procedure provided 10-(2'-hydroxy-3',4'-dimethoxy-6'-methylphenyl)decanoic acid (formula II-2 wherein R=H3CO, X=H, Y=OH, n=8, in the free form) (0.14 part) as colorless powdery crystals melting at 62.5°-66° C.

Workup

  1. customThe toluene layer was separated
  2. extractionthe water layer was extracted with diethyl ether
  3. washwashed with water
  4. customdried
  5. distillationThe solvents were then distilled off under reduced pressure
  6. customthe residue was recrystallized from ligroine

Sources & evidence

ORD record
ord-e9c72f9598574525a77887e76c7de613
Source dataset
uspto-grants-1983_10
Patent number
US04407757

Reaction notes

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