A novel carbazole photoinitiator 1-(6-o-chloro-benzoyl-9-ethyl-9H-carbazol-3yl)-ethane-1-one oxime O-ethyrate is synthesized from carbazole by N-alkylation,Friedel-Crafts acylation,oximation and esterification.The str...A novel carbazole photoinitiator 1-(6-o-chloro-benzoyl-9-ethyl-9H-carbazol-3yl)-ethane-1-one oxime O-ethyrate is synthesized from carbazole by N-alkylation,Friedel-Crafts acylation,oximation and esterification.The structure is characterized by 1HNMR,13CNMR,UV and IR.This paper discuss the catalyst,temperature and time of oximation and gain the optimum reaction conditions:CH3COOK is base,temperature is 70℃ and time is 6h.The yield is 89.1%.展开更多
为克服目前合成方法存在收率较低,反应时间长、产品分离困难等不足,本文以β-D-葡萄糖、乙酰溴为原料,经乙酰化、溴代反应合成了糖基体2,3,4,6-O-四乙酰基-α-D-溴代葡萄糖,再与4-羟基苯甲醛衍生物经糖苷化反应合成了5种4-甲酰基苯基(2,...为克服目前合成方法存在收率较低,反应时间长、产品分离困难等不足,本文以β-D-葡萄糖、乙酰溴为原料,经乙酰化、溴代反应合成了糖基体2,3,4,6-O-四乙酰基-α-D-溴代葡萄糖,再与4-羟基苯甲醛衍生物经糖苷化反应合成了5种4-甲酰基苯基(2,3,4,6-O-四乙酰基)-β-D-葡萄糖苷衍生物。在合成4-甲酰基苯基(2,3,4,6-O-四乙酰基)-β-D-葡萄糖苷衍生物的过程中,采用10%(质量分数) Na OH溶液为缚酸剂,三(3,6-二氧杂庚基)胺(TDA-1)为相转移催化剂,反应物的收率为61%～69%,并应用核磁共振技术确定了产品的结构。该方法具有产品收率较高,反应温和、操作简单等优点。展开更多
文摘A novel carbazole photoinitiator 1-(6-o-chloro-benzoyl-9-ethyl-9H-carbazol-3yl)-ethane-1-one oxime O-ethyrate is synthesized from carbazole by N-alkylation,Friedel-Crafts acylation,oximation and esterification.The structure is characterized by 1HNMR,13CNMR,UV and IR.This paper discuss the catalyst,temperature and time of oximation and gain the optimum reaction conditions:CH3COOK is base,temperature is 70℃ and time is 6h.The yield is 89.1%.
文摘为克服目前合成方法存在收率较低,反应时间长、产品分离困难等不足,本文以β-D-葡萄糖、乙酰溴为原料,经乙酰化、溴代反应合成了糖基体2,3,4,6-O-四乙酰基-α-D-溴代葡萄糖,再与4-羟基苯甲醛衍生物经糖苷化反应合成了5种4-甲酰基苯基(2,3,4,6-O-四乙酰基)-β-D-葡萄糖苷衍生物。在合成4-甲酰基苯基(2,3,4,6-O-四乙酰基)-β-D-葡萄糖苷衍生物的过程中,采用10%(质量分数) Na OH溶液为缚酸剂,三(3,6-二氧杂庚基)胺(TDA-1)为相转移催化剂,反应物的收率为61%～69%,并应用核磁共振技术确定了产品的结构。该方法具有产品收率较高,反应温和、操作简单等优点。
