摘要
以咔唑为原料,在季铵盐存在下,反应温度30℃-35℃,用溴乙烷烷基化,收率95.7％;用65％浓硝酸硝化,收率 101％;经硫化碱还原,收率为97.2％,制备了3-氨基-N-乙基咔唑,再与四氯苯醌缩合反应合成了永固紫RL(C.I.颜料 紫23),收率为80％。
3-amino-N-ethylcarbazole was prepared from carbazole by alkylation with ethyl bromide (95.7%yield), nitration with 65% nitric acid (101%yield), then reduction with sodium sulfide (97.2% yield). The product was condensed with tetrachlorobenzoquinone to give Sumitone Fast Violet RL (C.I. Pigment Violet 23) with an 80% yield.
出处
《染料与染色》
CAS
2003年第4期198-200,共3页
Dyestuffs and Coloration
关键词
永固紫RL
相转移催化
溴乙烷
四氯苯醌
N-乙基咔唑
Sumitone
Fast Violet RL (C.I. Pigment Violet 23)
N-ethylcarbazole ethyl bromide
tetrachlorobenzoquinone
alkylation
nitration
reduction
