The synthetic route of 3’-amino carboxylate hydrochloride of quercetin is improved.Using benzyl bromide to partly protect the hydroxyl groups,the protected quercetin then react with a series of Boc protected amino ac...The synthetic route of 3’-amino carboxylate hydrochloride of quercetin is improved.Using benzyl bromide to partly protect the hydroxyl groups,the protected quercetin then react with a series of Boc protected amino acids to afford the 3’-amino carboxylate,hydrogenised and treated with HCl(g),a series of 3’-amino carboxylate hydrochloride of quercetin are synthesized in good yields.The structures of these compounds are confirmed by means of their m.p.,mass spectra and 1H NMR.展开更多
以乙腈作溶剂,苄基溴和二苯胺在叔丁醇钾的催化下,可以直接合成得到N,N-二苯基苄叔胺类化合物,产率60.2%~81.4%。产物经1 H NMR、13 C NMR和GC-MS确证。得出合成N,N-二苯基叔胺最优化条件为n（苄基溴）∶n（二苯胺）∶n（叔丁醇钾）=1.5...以乙腈作溶剂,苄基溴和二苯胺在叔丁醇钾的催化下,可以直接合成得到N,N-二苯基苄叔胺类化合物,产率60.2%~81.4%。产物经1 H NMR、13 C NMR和GC-MS确证。得出合成N,N-二苯基叔胺最优化条件为n（苄基溴）∶n（二苯胺）∶n（叔丁醇钾）=1.5∶1∶1,以乙腈为溶剂,室温下反应12h。该方法具有反应条件温和,操作简单,产率较高等优点。展开更多
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
文摘The synthetic route of 3’-amino carboxylate hydrochloride of quercetin is improved.Using benzyl bromide to partly protect the hydroxyl groups,the protected quercetin then react with a series of Boc protected amino acids to afford the 3’-amino carboxylate,hydrogenised and treated with HCl(g),a series of 3’-amino carboxylate hydrochloride of quercetin are synthesized in good yields.The structures of these compounds are confirmed by means of their m.p.,mass spectra and 1H NMR.
文摘以乙腈作溶剂,苄基溴和二苯胺在叔丁醇钾的催化下,可以直接合成得到N,N-二苯基苄叔胺类化合物,产率60.2%~81.4%。产物经1 H NMR、13 C NMR和GC-MS确证。得出合成N,N-二苯基叔胺最优化条件为n（苄基溴）∶n（二苯胺）∶n（叔丁醇钾）=1.5∶1∶1,以乙腈为溶剂,室温下反应12h。该方法具有反应条件温和,操作简单,产率较高等优点。
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.
