反应详情

Salicylic acid (0.67 m) was alkylated with 1.33 m isopropanol using 3.3 m concentrated sulphuric acid as catalyst at 70°C for six hours, to give 2-hydroxy-3,5-diisopropyl benzoic acid (m.p. 113°-116°C) in 40% yield. This was esterified to form the methyl ester and converted into its hydrazide using hydrate in aqueous ethanol. The hydrazide had a melting point of 111°-113°C and the following elemental analysis by weight: