Water → 2-hydroxy-3-phenylaminocarbonyl-6-hydroxycarbonylnaphthalene

Participants

Reaction Steps

Sodium 3-phenylaminocarbonyl-6-methoxycarbonyl-2-naphthoate (0.081 g) obtained in Example 29 was suspended in methanol (8.10 g) and deionized water (8.13 g) and 1N-sodium hydroxide (4.0 g) was added dropwise under ice-cooling, followed by stirring overnight. The reaction solution was freeze-dried and the resultant solid was dissolved in water. The solution was acidified with diluted hydrochloric acid and the deposited crystal was filtered. The crystal was dried under reduced pressure to obtain 0.057 g of 2-hydroxy-3-phenylaminocarbonyl-6-hydroxycarbonylnaphthalene.

Provenance & Evidence