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内氢键对芳环^(13)C化学位移的影响
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作者 谢如刚 刘华骥 +1 位作者 韩明成 丁涪江 《化学研究与应用》 CAS CSCD 1992年第2期60-67,共8页
本文讨论水杨醛、邻——基苯乙酮及2——基雌甾化合物的分子内氢键对芳环~13C化学位移的影响。采用量子化学CNDO/2方法,计算取代芳烃各原子的净电荷,从碳原子的净电荷与化学位移的对应关系进一步论证了此种影响.首次得到形成内氢键的甲... 本文讨论水杨醛、邻——基苯乙酮及2——基雌甾化合物的分子内氢键对芳环~13C化学位移的影响。采用量子化学CNDO/2方法,计算取代芳烃各原子的净电荷,从碳原子的净电荷与化学位移的对应关系进一步论证了此种影响.首次得到形成内氢键的甲甲基、乙乙基及及基对所在碳的取代基增量的校正值,经校正后化学位移的计算值与实测值很好符合。 展开更多
关键词 取代苯 2——基雌甾 内氢键 13C化学位移 CNDO/2
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Synthesis of 3-(4-hydroxyphenyl)-4-methyl-6-methoxy-7-hydroxycoumarin and its analogues as angiogenesis inhibitors
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作者 邹昊 蒋皓 +4 位作者 周洁芸 朱焰 曹霖 夏鹏 张倩 《Journal of Chinese Pharmaceutical Sciences》 CAS 2010年第2期136-140,共5页
3-(4-Hydroxyphenyl)-4-methyl-6-methoxy-7-hydroxycoumarin (2a) and its analogues with different substituents at the p-position of 3-phenyl group were designed and synthesized as the non-steroidal analogues of 2-met... 3-(4-Hydroxyphenyl)-4-methyl-6-methoxy-7-hydroxycoumarin (2a) and its analogues with different substituents at the p-position of 3-phenyl group were designed and synthesized as the non-steroidal analogues of 2-methoxyestradiol (2-ME 1). The desired compounds were synthesized via a novel and simple route and the effects of specific substituents on their antiangiogenesis activities were investigated with Human umbilical vein endothelial cells (HUVECs) proliferation assays. Preliminary biological screening showed that compounds 2a and 2d (IC50 = 61.0 and 76.7 ktM, respectively) have potential anti-angiogenesis activities. The bulk of the group at the p-position of 3-phenyl group likely play an important role in their activities. 展开更多
关键词 Angiogenesis inhibitor 2-METHOXYESTRADIOL Non-steroidal analogue 3-(4-Hydroxyphenyl)-4-methyl-6-methoxyl-7- hydroxycoumarin
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