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18162-48-6872-50-4Methylene ChloridenaphthaleneTHFTitanium Dioxide
ChemicalBook CAS DataBase List 3-Hydroxy-2-naphthoic acid
92-70-6

3-Hydroxy-2-naphthoic acid synthesis

11synthesis methods
3 -Hydroxy-2-naphthoic acid is invariably by the Kolbe – Schmitt reaction of carbon dioxide with the dried sodium salt of 2-naphthol at 220 – 260℃. Many improvements in both process and equipment have been developed. The main problems are removal of the 50 % unreacted 2-naphthol and avoidance of a tarry byproduct. Yields of 80 % based on the amount of 2-naphthol consumed are possible despite the low conversion.
sodium 2-naphtholate

875-83-2
6 suppliers
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3-Hydroxy-2-naphthoic acid

92-70-6
423 suppliers
$10.00/10g

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Yield:92-70-6 69%

Steps:

4 Example 4
After the usual workup, the 2-hydroxynaphthalene-3-carboxylic acid is obtained in a yield of 69% based on sodium β-naphtholate used.

References:

Hoechst Aktiengesellschaft US5532406, 1996, A

93-09-4 Synthesis
2-Naphthoic acid

93-09-4
300 suppliers
$5.00/1g

3-Hydroxy-2-naphthoic acid

92-70-6
423 suppliers
$10.00/10g

References
Carbon dioxide

124-38-9
130 suppliers
$175.00/23402

Potassium 2-naphtholate

36294-21-0
1 suppliers
inquiry

6-Hydroxy-2-naphthoic acid

16712-64-4
354 suppliers
$5.00/5g

3-Hydroxy-2-naphthoic acid

92-70-6
423 suppliers
$10.00/10g

References
Carbon dioxide

124-38-9
130 suppliers
$175.00/23402

sodium 2-naphtholate

875-83-2
6 suppliers
inquiry

3-Hydroxy-2-naphthoic acid

92-70-6
423 suppliers
$10.00/10g

References
135-19-3 Synthesis
2-Naphthol

135-19-3
738 suppliers
$9.00/1g

3-Hydroxy-2-naphthoic acid

92-70-6
423 suppliers
$10.00/10g

References

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