反应详情

温度

80 °C

2,6-Dicarboxynaphthalene having carboxyl groups bonded to a naphthalene nucleus, designated compound A, is chosen as a starting compound. Two moles of thionyl chloride is added to one mole of compound A, and the mixture is heated to about 75 to 90° C., preferably about 80° C., with stirring in a nitrogen atmosphere. Then the stirring force is diminished, and the reaction mixture is refluxed for about 6 to 18 hours, desirably about 10 to 12 hours. The bath temperature is set at about 90 to 100° C., at which unreacted thionyl chloride is removed by evaporation over about 2 hours to obtain 2,6-dicarboxychloronaphthalene, designated compound B.

1. temperaturethe reaction mixture is refluxed for about 6 to 18 hours, desirably about 10 to 12 hours
2. customis removed by evaporation over about 2 hours