The synthesis of an new photochromical compound,1,3,3 trimethyl 6′ (1 piperidinyl) spiro[2h indole 2,3′ [3H]pyridobenzoxazine (SP3),and an improved way for the synthesis of 6 hydroxyquinoline were descrided.The abso...The synthesis of an new photochromical compound,1,3,3 trimethyl 6′ (1 piperidinyl) spiro[2h indole 2,3′ [3H]pyridobenzoxazine (SP3),and an improved way for the synthesis of 6 hydroxyquinoline were descrided.The absorption spectrum of the colored metastable form SP3 shows prominent absorption peak at 560nm at 60℃?展开更多
1-氧基磷杂-4-羟甲基-2,6,7-三氧杂双环[2.2.2]辛烷(PEPA)与三甲基氯硅烷反应合成阻燃成炭剂笼状1-氧基磷杂-4-三甲基硅氧甲基-2,6,7-三氧杂双环[2.2.2]辛烷酯(PTSPA)。探讨了不同溶剂、反应温度和反应物配比对产物产率的影响,最佳反应...1-氧基磷杂-4-羟甲基-2,6,7-三氧杂双环[2.2.2]辛烷(PEPA)与三甲基氯硅烷反应合成阻燃成炭剂笼状1-氧基磷杂-4-三甲基硅氧甲基-2,6,7-三氧杂双环[2.2.2]辛烷酯(PTSPA)。探讨了不同溶剂、反应温度和反应物配比对产物产率的影响,最佳反应条件是以二氧六环为溶剂,三乙胺为缚酸剂,PEPA与三甲基氯硅烷的物质的量比为1∶1.15,95℃反应8h,产率为91.6%。通过FT IR、1 H NMR、元素分析、极限氧指数及差热分析等技术表征了产物的结构及性能。实验表明,目标产物有较好的阻燃成炭性和热稳定性。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
In order to obtain the key intermediate of vandetanib,4-chloro-6-methoxy-7-(1-methylpiperidin-4-ylmethoxy)quinazoline was synthesized from methyl 4-[1-(tert-butoxycarbonyl) piperidin-4-ylmethoxy]-3-methoxybenzoate by ...In order to obtain the key intermediate of vandetanib,4-chloro-6-methoxy-7-(1-methylpiperidin-4-ylmethoxy)quinazoline was synthesized from methyl 4-[1-(tert-butoxycarbonyl) piperidin-4-ylmethoxy]-3-methoxybenzoate by deprotection,methylation,nitration,reduction,ring formation and substitution reaction in an overall yield of 58%.The structures of the compound and its intermediates were determined by 1H NMR and MS.展开更多
文摘The synthesis of an new photochromical compound,1,3,3 trimethyl 6′ (1 piperidinyl) spiro[2h indole 2,3′ [3H]pyridobenzoxazine (SP3),and an improved way for the synthesis of 6 hydroxyquinoline were descrided.The absorption spectrum of the colored metastable form SP3 shows prominent absorption peak at 560nm at 60℃?
文摘1-氧基磷杂-4-羟甲基-2,6,7-三氧杂双环[2.2.2]辛烷(PEPA)与三甲基氯硅烷反应合成阻燃成炭剂笼状1-氧基磷杂-4-三甲基硅氧甲基-2,6,7-三氧杂双环[2.2.2]辛烷酯(PTSPA)。探讨了不同溶剂、反应温度和反应物配比对产物产率的影响,最佳反应条件是以二氧六环为溶剂,三乙胺为缚酸剂,PEPA与三甲基氯硅烷的物质的量比为1∶1.15,95℃反应8h,产率为91.6%。通过FT IR、1 H NMR、元素分析、极限氧指数及差热分析等技术表征了产物的结构及性能。实验表明,目标产物有较好的阻燃成炭性和热稳定性。
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In order to obtain the key intermediate of vandetanib,4-chloro-6-methoxy-7-(1-methylpiperidin-4-ylmethoxy)quinazoline was synthesized from methyl 4-[1-(tert-butoxycarbonyl) piperidin-4-ylmethoxy]-3-methoxybenzoate by deprotection,methylation,nitration,reduction,ring formation and substitution reaction in an overall yield of 58%.The structures of the compound and its intermediates were determined by 1H NMR and MS.
