3-Hydroxy-2-naphthoic acid hydrazide → 3-hydroxy-N'-(1-methylpropylidene)-2-naphthohydrazide

Participants

Reaction Conditions

Reaction Steps

A four neck flask (3 liters) equipped with a thermometer, a reflux condenser and a stirrer was charged with 121.2 g (0.6 mol) of 3-hydroxy-2-naphthohydrazide and 2 liters of methyl ethyl ketone and then heated under refluxing for 5 hours. The reaction liquid was cooled down to 20° C. or lower, and then crystal was filtered off and dried under reduced pressure, whereby the intended compound (slightly yellow crystal) was obtained.

Provenance & Evidence