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958332-87-1

7-BroMo-1,5-naphthyridine-3-carboxylic acid synthesis

3synthesis methods
-

Yield:958332-87-1 99%

Reaction Conditions:

with sodium hydroxide in ethanol;water at 60; for 5 h;

Steps:

5 Example 5 Production of 7-bromo-1,5-naphthyridine-3-carboxylic acid

Methyl 7-bromo-1,5-naphthyridine-3-carboxylate (26 g, 98 mmol) was dissolved in ethanol (150 mL)Add 10% NaOH aqueous solution (260 mL), add the reaction solution to 60 ° C for 5 h, and evaporate to remove ethanol.Adjust the pH to 4-6 with 2M hydrochloric acid, precipitate a solid, and filter with suction.Drying gave the desired product 7-bromo-1,5-naphthyridin-3-carboxylic acid (25 g, white solid, yield 99%).

References:

CN108658977,2018,A Location in patent:Paragraph 0066; 0067; 0068