以5,6-二甲氧基-2-(4-吡啶基)-亚甲基-1-茚酮(Ⅱ)和溴化苄(Ⅲ)为原料,合成盐酸多奈哌齐的关键中间体1-苄基-4-(5,6-二甲氧基-1-茚酮-2-亚甲基)-吡啶(Ⅰ).研究了主要因素对反应的影响,n(Ⅱ)∶n(Ⅲ)=1∶1.3,反应时间60 m in,收率为92.8%....以5,6-二甲氧基-2-(4-吡啶基)-亚甲基-1-茚酮(Ⅱ)和溴化苄(Ⅲ)为原料,合成盐酸多奈哌齐的关键中间体1-苄基-4-(5,6-二甲氧基-1-茚酮-2-亚甲基)-吡啶(Ⅰ).研究了主要因素对反应的影响,n(Ⅱ)∶n(Ⅲ)=1∶1.3,反应时间60 m in,收率为92.8%.经核磁共振谱图分析确认为目标产物.进一步讨论了反应的动力学过程,并建立了动力学方程.展开更多
The halogen substituted anthranilic acid(1) was condensed with acetic anhydride to give halogen substituted 3 methyl 1H 2,4 benoxazin 1 one(2), which was further condensed with hydrazide (3) to give twelve novel halog...The halogen substituted anthranilic acid(1) was condensed with acetic anhydride to give halogen substituted 3 methyl 1H 2,4 benoxazin 1 one(2), which was further condensed with hydrazide (3) to give twelve novel halogen substituted 2 (3 methyl 5 substitued 4H 1,2,4 triazol 4 yl) benzoic acid. All compounds synthesized were identified by 1H NMR and elemental analyses.展开更多
文摘以5,6-二甲氧基-2-(4-吡啶基)-亚甲基-1-茚酮(Ⅱ)和溴化苄(Ⅲ)为原料,合成盐酸多奈哌齐的关键中间体1-苄基-4-(5,6-二甲氧基-1-茚酮-2-亚甲基)-吡啶(Ⅰ).研究了主要因素对反应的影响,n(Ⅱ)∶n(Ⅲ)=1∶1.3,反应时间60 m in,收率为92.8%.经核磁共振谱图分析确认为目标产物.进一步讨论了反应的动力学过程,并建立了动力学方程.
文摘The halogen substituted anthranilic acid(1) was condensed with acetic anhydride to give halogen substituted 3 methyl 1H 2,4 benoxazin 1 one(2), which was further condensed with hydrazide (3) to give twelve novel halogen substituted 2 (3 methyl 5 substitued 4H 1,2,4 triazol 4 yl) benzoic acid. All compounds synthesized were identified by 1H NMR and elemental analyses.