以2-溴呋喃和硼酸三丁酯为原料,采用正丁基锂法合成了2-呋喃硼酸。考察了反应温度、反应时间、物料配比以及pH值等主要因素对合成反应产率的影响。采用HPLC,FTIR,1 H NMR等方法对产品的纯度和结构进行了分析表征。结果表明:当反应温度为...以2-溴呋喃和硼酸三丁酯为原料,采用正丁基锂法合成了2-呋喃硼酸。考察了反应温度、反应时间、物料配比以及pH值等主要因素对合成反应产率的影响。采用HPLC,FTIR,1 H NMR等方法对产品的纯度和结构进行了分析表征。结果表明:当反应温度为-60℃,反应时间为1h,物料配比为n(2-溴呋喃)∶n(硼酸三丁酯)∶n(正丁基锂)=1.00∶1.20∶1.20,pH值为6.0时,2-呋喃硼酸的产率最高可达84.0%,纯度可达99.702 7%。展开更多
The asymmetric Michael addition-elimination reaction of chiral 5-(1S)-bornyloxy-3,4-dibromo-2(5H)furanones and some amines are investigated.Four new chiral bornyl amine derivatives 6a~6d are obtained.they are identif...The asymmetric Michael addition-elimination reaction of chiral 5-(1S)-bornyloxy-3,4-dibromo-2(5H)furanones and some amines are investigated.Four new chiral bornyl amine derivatives 6a~6d are obtained.they are identified by IR,1H NMR,13C NMR,HRMS and so on.It offer a new way to synthetize more chiral bornyl amine derivatives.展开更多
以苦参碱为原料,在氢氧化钠的碱性溶液中使苦参碱的内酰胺水解得到苦参酸钠,将制得的苦参酸钠溶于醇,再与反应过的氯化亚砜醇溶液反应得到相应苦参酸酯.以互为药效基团的5-烷氧基-3,4-二溴-2(5H)-呋喃酮和苦参酸酯合成含呋喃酮骨架的苦...以苦参碱为原料,在氢氧化钠的碱性溶液中使苦参碱的内酰胺水解得到苦参酸钠,将制得的苦参酸钠溶于醇,再与反应过的氯化亚砜醇溶液反应得到相应苦参酸酯.以互为药效基团的5-烷氧基-3,4-二溴-2(5H)-呋喃酮和苦参酸酯合成含呋喃酮骨架的苦参碱衍生物,并以四甲基偶氮唑盐比色法(MTT法)初步研究了目标化合物对人肝癌细胞株SMMC-7721的细胞毒活性,以苦参碱、长春新碱(VCR)和阿糖胞苷(ARA)作对阳性对照药物.初步研究结果表明,目标化合物能够显著抑制人肝癌细胞增殖、诱导其凋亡,其中5-甲氧基-3,4-二溴-2(5H)-呋喃酮和苦参酸薄荷酯(5a)的抑制活性最佳,给药24 h IC_(50)为0.0004μmol/L,优于一线抗肝癌药物长春新碱(0.1284μmol/L)、阿糖胞苷(0.4578μmol/L)及母体化合物苦参碱(0.9018μmol/L).展开更多
文摘以2-溴呋喃和硼酸三丁酯为原料,采用正丁基锂法合成了2-呋喃硼酸。考察了反应温度、反应时间、物料配比以及pH值等主要因素对合成反应产率的影响。采用HPLC,FTIR,1 H NMR等方法对产品的纯度和结构进行了分析表征。结果表明:当反应温度为-60℃,反应时间为1h,物料配比为n(2-溴呋喃)∶n(硼酸三丁酯)∶n(正丁基锂)=1.00∶1.20∶1.20,pH值为6.0时,2-呋喃硼酸的产率最高可达84.0%,纯度可达99.702 7%。
文摘The asymmetric Michael addition-elimination reaction of chiral 5-(1S)-bornyloxy-3,4-dibromo-2(5H)furanones and some amines are investigated.Four new chiral bornyl amine derivatives 6a~6d are obtained.they are identified by IR,1H NMR,13C NMR,HRMS and so on.It offer a new way to synthetize more chiral bornyl amine derivatives.
基金Project supported by the National Natural Science Foundation of China(No.21462032)the Natural Science Foundation of Ningxia Hui Antonomous Region(No.NZ17001)+2 种基金the Discipline Project of Ningxia Hui Antonomous Region(No.NXYLXK2017A04)the Major Innovation Projects for Building First-class Universities in China's Western Region(No.ZKZD2017003)the Graduate Innovation of Ningxia University(No.GIP2018048)and the College Students’ Innovative and Entrepreneurship Training Program of Ningxia University(No.Q201710749028)~~
文摘以苦参碱为原料,在氢氧化钠的碱性溶液中使苦参碱的内酰胺水解得到苦参酸钠,将制得的苦参酸钠溶于醇,再与反应过的氯化亚砜醇溶液反应得到相应苦参酸酯.以互为药效基团的5-烷氧基-3,4-二溴-2(5H)-呋喃酮和苦参酸酯合成含呋喃酮骨架的苦参碱衍生物,并以四甲基偶氮唑盐比色法(MTT法)初步研究了目标化合物对人肝癌细胞株SMMC-7721的细胞毒活性,以苦参碱、长春新碱(VCR)和阿糖胞苷(ARA)作对阳性对照药物.初步研究结果表明,目标化合物能够显著抑制人肝癌细胞增殖、诱导其凋亡,其中5-甲氧基-3,4-二溴-2(5H)-呋喃酮和苦参酸薄荷酯(5a)的抑制活性最佳,给药24 h IC_(50)为0.0004μmol/L,优于一线抗肝癌药物长春新碱(0.1284μmol/L)、阿糖胞苷(0.4578μmol/L)及母体化合物苦参碱(0.9018μmol/L).