The paper confirms the ratio of chain segment of polyasparticacid and calcium hydroxide molar cover 1:5 and the 2—hour reaction in aqueous solution at the room temperature is the best condition for synthesis of calci...The paper confirms the ratio of chain segment of polyasparticacid and calcium hydroxide molar cover 1:5 and the 2—hour reaction in aqueous solution at the room temperature is the best condition for synthesis of calcium polyaspartate.The calcium polyaspartate was puriffied by the means of calcium polyaspartate were marked with IR spectrum,elemental analysis,molecular weight distribution and degree ionization.展开更多
As silatranes and its related compounds have specific structures and have been demonstrated to show a significent biological activity, eleven new C-methylsubstituted 1-ferroceneacyloxysilatranes were synthesized via t...As silatranes and its related compounds have specific structures and have been demonstrated to show a significent biological activity, eleven new C-methylsubstituted 1-ferroceneacyloxysilatranes were synthesized via the reaction of ferrocenecarboxylic acids and C-methysubstituted 1-ethoxysilatrans. They were characterized by means of IR, 1H NMR and elemental analysis. X-ray structure determination of compound 1 indicates the presence of N→Si bond with a bond length of 0.2113(4) nm. It belongs to monoclinic system, space group P2(1)/c with a=1.4050(16) nm, b=1.2758(14) nm, c=1.1196(12) nm, α=90°, β=108.598(18)°, γ=90°, Z=4.展开更多
以锌粉、烯丙基溴和邻苯二甲酸酐为原料,采用微波辐射技术,在无催化剂条件下直接合成二烯丙基內酯,考察了微波辐射功率和辐射时间对产率的影响,最适宜的反应条件为:锌粉∶烯丙基溴∶邻苯二甲酸酐(摩尔比)=1∶1∶0.4,微波辐射功率225 W,...以锌粉、烯丙基溴和邻苯二甲酸酐为原料,采用微波辐射技术,在无催化剂条件下直接合成二烯丙基內酯,考察了微波辐射功率和辐射时间对产率的影响,最适宜的反应条件为:锌粉∶烯丙基溴∶邻苯二甲酸酐(摩尔比)=1∶1∶0.4,微波辐射功率225 W,辐射时间5 m in,产率达75%。展开更多
文摘The paper confirms the ratio of chain segment of polyasparticacid and calcium hydroxide molar cover 1:5 and the 2—hour reaction in aqueous solution at the room temperature is the best condition for synthesis of calcium polyaspartate.The calcium polyaspartate was puriffied by the means of calcium polyaspartate were marked with IR spectrum,elemental analysis,molecular weight distribution and degree ionization.
文摘As silatranes and its related compounds have specific structures and have been demonstrated to show a significent biological activity, eleven new C-methylsubstituted 1-ferroceneacyloxysilatranes were synthesized via the reaction of ferrocenecarboxylic acids and C-methysubstituted 1-ethoxysilatrans. They were characterized by means of IR, 1H NMR and elemental analysis. X-ray structure determination of compound 1 indicates the presence of N→Si bond with a bond length of 0.2113(4) nm. It belongs to monoclinic system, space group P2(1)/c with a=1.4050(16) nm, b=1.2758(14) nm, c=1.1196(12) nm, α=90°, β=108.598(18)°, γ=90°, Z=4.
