1-Naphthoic acid → 2-(1-Naphthyl)-1,3-benzoxazol-5-amine

Participants

Reaction Conditions

Reaction Steps

8 mmol of 2,4-diaminophenol.2HCl and 8 mmol of naphthalene-1-carboxylic acid were dissolved in 10 g of polyphosphoric acid (PPA), and then, the mixed solution was stirred at a temperature of 180° C. for 3 to 4 hours. After completion of the reaction, the reaction solution was cooled, neutralized with 10% NaOH, and filtered by using distilled water for recrystallization in a slow manner, thereby obtaining 1.6 g of 2-(naphthalene-1-yl)benzo[d]oxazole-5-amine (Derivative #2) (yield: 77%).

Provenance & Evidence