Hydrochloric Acid → 1-Naphthol

HRID 1732492Notes

Reaction equation

HRID 1732492 reaction equation
Cl.[C:2]1([O-:12])[C:11]2[C:6](=[CH:7][CH:8]=[CH:9][CH:10]=2)[CH:5]=[CH:4][CH:3]=1.[K+]>>[C:2]1([OH:12])[C:11]2[C:6](=[CH:7][CH:8]=[CH:9][CH:10]=2)[CH:5]=[CH:4][CH:3]=1

Participants

3

Reactant 2

HCID 313Hydrochloric AcidHCID 236723231-Naphthalenol, potassium salt (1:1)

Product 1

HCID 70051-Naphthol

Procedure

An alcoholic solution of potassium α-naphtholate produced as in Example 4 hereinabove is acidified with gaseous hydrochloric acid taken in the equimolar amount relative to potassium α-naphtholate at a temperature ranging from 20° to 30° C. After separation of precipitated pure potassium chloride, the solution of α-naphthol in ethanol is separated following the procedure described in the foregoing Example 4 to give 116 g of α-naphthol with a purity of 97.5%. The total yield of α-naphthol is 140 g (98% of theory) as calculated for the employed naphthalene.

Workup

  1. customranging from 20° to 30° C
  2. customAfter separation of precipitated pure potassium chloride
  3. customthe solution of α-naphthol in ethanol is separated

Sources & evidence

ORD record
ord-912bef2c42d74b9d93a8c050feef8d2b
Source dataset
uspto-grants-1980_12
Patent number
US04237323

Reaction notes

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