杀菌剂二噻农中间体2,3-二氯-1,4-萘醌的合成

Synthesis of Intermediate 2,3-Dichloro-1,4-naphthoenone for Fungicide Dithianon

介绍了杀菌剂二噻农中间体2,3-二氯-1,4-萘醌的合成方法。以4-胺基-1-萘磺酸钠为原料,经过酸化、氯化、氧化一锅法合成2,3-二氯-1,4-萘醌;经过滤、重结晶得到含量98%以上2,3-二氯-1,4-萘醌,收率达76%(以4-胺基-1-萘磺酸钠计。

The synthetic method of dithianon intermediate 2,3-dichloro-1,4-naphthoquinone was introduced,2,3-dichloro-1,4-naphthoquinone was synthesized, starting with raw material 4-amino1-naphthalene sulfonate sodium, then acidification, chlorination and oxidation. Through filtration and recrystallization, more than 98% of2,3-dichloro-1,4-naphthoquinone was obtained, and the yield reached 76%（measured by sodium 4-amino-1-naphthalene sulfonate）.