反应详情

温度

215 °C

A mixture of 6,7-dimethoxy-1,2-dihydro-3-naphthoic acid (1.7 g) and powdery sulfur (0.47 g) is heated at 215° C. for 30 minutes to afford 6,7-dimethoxy-2-naphthoic acid (1.6 g), which is recrystallized from ethanol to give colorless prisms, m.p. 245°-247° C.