3-Hydroxy-2-naphthoic acid → Sodium 2-naphtholate

HRID 2186544Notes

Reaction equation

HRID 2186544 reaction equation
[OH:1][C:2]1[C:11](C(O)=O)=[CH:10][C:9]2[C:4](=[CH:5][CH:6]=[CH:7][CH:8]=2)[CH:3]=1.C1C2C(=CC=CC=2)C=CC=1O.[H-].[Na+:27]>>[CH:3]1[C:4]2[C:9](=[CH:8][CH:7]=[CH:6][CH:5]=2)[CH:10]=[CH:11][C:2]=1[O-:1].[Na+:27]

Participants

4

Reactant 3

HCID 71043-Hydroxy-2-naphthoic acidHCID 86632-NaphtholHCID 24758Sodium hydride

Product 1

HCID 23664630Sodium 2-naphtholate

Procedure

2-hydroxynaphthalene-3-carboxylic acid is important as an intermediate for pigments or dyes. Generally, it is prepared by reacting β-naphthol with sodium hydride to give sodium β-naphtholate, reacting the resulting compound with carbon dioxide under pressure to give sodium 2-hydroxynaphthalene-3-carboxylate and then, isolating the desired compound by means of acid precipitation i.e. by adding a mineral acid to the salt.

Workup

  1. customGenerally, it is prepared

Sources & evidence

ORD record
ord-037b8bed701b4853a47466af7a8c22d1
Source dataset
uspto-grants-2002_06
Patent number
US06403827B1

Reaction notes

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