The immediate(3) was prepared via three steps: at first substitutionof diethyl phosphonite,as the initial material,followed by addition-elimination.After Michael Reaction withdiethylmalonate,hydrolyzation and decarb...The immediate(3) was prepared via three steps: at first substitutionof diethyl phosphonite,as the initial material,followed by addition-elimination.After Michael Reaction withdiethylmalonate,hydrolyzation and decarboxylation,(3) converted into key immediate(6),which was subsequentlyconjugated with Melphalan and specifically phosphonate cleaved.Then thetitle conjugate Awas achieved.Its structure was verified by()1HNMR,IR,MS and it showed good bone targeting ability via hydroxyapatite adhesion testsin vitro.展开更多
以亚硫酸氢钠-过硫酸铵为引发体系通过自由基聚合合成了丙烯酸(AA)/丙烯酰胺(AM)/(1-二甲氨基烯丙基)-膦酸(DMAAPA)/二乙基二烯丙基溴化铵(DDAB)四元共聚物。最佳反应条件为:m(AA)∶m(AM)∶m(DMAAPA)∶m(DDAB)=4.0∶6.0∶0.015∶0.020,w...以亚硫酸氢钠-过硫酸铵为引发体系通过自由基聚合合成了丙烯酸(AA)/丙烯酰胺(AM)/(1-二甲氨基烯丙基)-膦酸(DMAAPA)/二乙基二烯丙基溴化铵(DDAB)四元共聚物。最佳反应条件为:m(AA)∶m(AM)∶m(DMAAPA)∶m(DDAB)=4.0∶6.0∶0.015∶0.020,w(引发剂)=0.3%,pH=7,反应温度为40℃,单体总质量分数为20%。对AA/AM/DMAAPA/DDAB的分子结构进行了IR、1 H NMR表征。研究表明:该共聚物具有良好的耐温、耐盐、抗剪切性能;当该共聚物质量分数为1.0%时,对蒙脱土的防膨率达到84.05%,与质量分数1.0%的KCl复配后测得的防膨率达到95.04%。展开更多
文摘The immediate(3) was prepared via three steps: at first substitutionof diethyl phosphonite,as the initial material,followed by addition-elimination.After Michael Reaction withdiethylmalonate,hydrolyzation and decarboxylation,(3) converted into key immediate(6),which was subsequentlyconjugated with Melphalan and specifically phosphonate cleaved.Then thetitle conjugate Awas achieved.Its structure was verified by()1HNMR,IR,MS and it showed good bone targeting ability via hydroxyapatite adhesion testsin vitro.
文摘以亚硫酸氢钠-过硫酸铵为引发体系通过自由基聚合合成了丙烯酸(AA)/丙烯酰胺(AM)/(1-二甲氨基烯丙基)-膦酸(DMAAPA)/二乙基二烯丙基溴化铵(DDAB)四元共聚物。最佳反应条件为:m(AA)∶m(AM)∶m(DMAAPA)∶m(DDAB)=4.0∶6.0∶0.015∶0.020,w(引发剂)=0.3%,pH=7,反应温度为40℃,单体总质量分数为20%。对AA/AM/DMAAPA/DDAB的分子结构进行了IR、1 H NMR表征。研究表明:该共聚物具有良好的耐温、耐盐、抗剪切性能;当该共聚物质量分数为1.0%时,对蒙脱土的防膨率达到84.05%,与质量分数1.0%的KCl复配后测得的防膨率达到95.04%。