1.In the present paper, a series of xanthene-2-carboxylic acids and xanthone-2-carboxylic acids with electron withdrawing groups on the 7-position had been synthesized.

本文合成了一系列7位拉電子基團取代的氧雜蒽-2-羧酸及氧雜蒽酮-2-羧酸化合物。

2.In the present paper, a series of xanthene-2-carboxylic acids and xanthone-2-carboxylic acids with electron withdrawing groups on the 7-position had been synthesized.

本文合成了一系列7位拉電子基團取代的氧雜蒽-2-羧酸及氧雜蒽酮-2-羧酸化合物。

3.Methyl 9-hydroxyl-9-xanthene carboxyate which is an important intermediate of xanthene anticholiergic drugs was easily synthesized from methyl 9-xanthene carboxyate.

羥基-9-呫噸羧酸甲酯是合成呫噸類抗膽堿能藥物的一種重要的中間體。

4.The cationic dye may be chosen from azo dyes, azomethine dyes, methine dyes and xanthene dyes.

優(yōu)選地，陽離子染料選自偶氮染料、偶氮甲堿染料、次甲基染料和？噸染料。