2-Naphthol → HCID 178479471, compound

Participants

Reaction Steps

A suspension of trans-4-guanidinomethylcyclohexanecarboxylic acid hydrochloride (47.1 g), β-naphthol (28.8 g) and dicyclohexylcarbodiimide (45.4 g) in pyridine (400 ml) was stirred at room temperature for 24 hours. After evaporation of solvent, to the residue was added water (500 ml), and the mixture was acidified with hydrochloric acid. The resulting white crystals were dissolved in methanol (500 ml). After evaporation of methanol, the residue was recrystallized from methanol to give β-naphtyl trans-4-guanidinomethylcyclohexanecarboxylate hydrochloride (49.1 g, 67.8%), m.p. 195°-202° C.

Provenance & Evidence