乙氧基

In particular, when the Knoevenagel condensation of 2-hydroxybenzaldehyde was conducted with ethyl 2-cyanoacetate, 3-ethoxycarbonylcoumarin was obtained by simultaneous cyclization and alcoholysis of cyanide.

当反应底物为水杨醛与氰基乙酸乙酯的时候，产物为3-乙氧基羰基香豆素，这是水杨醛和氰基乙酸乙酯缩合关环，再发生氰基醇解的产物。

The UV-Visible absorption spectra and the fluorescence emission spectra of sixteen tetra-substituted metallo-phthalocyanine complexes {R4PcM, where R=2-［4-(2-sulfonic ethyl)piperazin-1-］ ethoxyl, 2-(piperidin-1-yl)ethoxyl; substitution position at α-position and β-position of phthalocyanine ring; M=Zn, Ni, Coand Cu} were measured.

报道了16种含哌嗪或含哌啶四取代酞菁金属配合物{R4PcM， R=2-［4-(2-磺基乙基)哌嗪-1-基］乙氧基、 2-(哌啶-1-基)乙氧基；取代位置分别在α位和β位； M=Zn， Ni， Co， Cu}的UV-Vis吸收光谱和荧光发射光谱的测定，探讨了中心金属离子、取代基种类及其取代位置、溶剂等因素对酞菁金属配合物UV-Vis吸收光谱和荧光发射光谱性质的影响。

From 3-chloropropene bycondensation with sodium ethylate in ethanol to form 3-ethoxypropene followed by anti-Markovnikov addition with HBr inthe presence of benzoyl peroxide.

3-氯丙烯与乙醇钠在乙醇中回流制得3-乙氧基丙烯，继而在过氧苯甲酰存在下，与溴化氢经反马氏加成制得1-溴-3-乙氧基丙烷，总收率89。

Nine new compounds were characterized, and they were: opuntioside Ⅰ(11), 4-ethoxyl-6-hydroxymethyl-α-pyrone (14),--ester (22), 1-butoxyl--malate (24), ethyl α-L-rhamnopyranoside (26), opuntioside Ⅱ(34), kaempferol 7-O-β-D-glucopyranosyl (1→4)-β-D-glucopyranoside (46), methyl α-D-glucopyranoside-6-(methyl 4-malate)-ester (47), and opuntioside Ⅲ(48). Opuntioside Ⅰ,Ⅱ,Ⅲ and 4-ethoxyl-6-hydroxymethyl-α-pyrone belong to the skelecton of α-pyrone.

新化合物分别是：仙人掌苷Ⅰ（11），4-乙氧基-6-羟甲基-α-吡喃酮（14），琥珀酸乙酯--酯（22），L--苹果酸-1-丁酯（24），乙基α-L-吡喃鼠李糖苷（26），仙人掌苷Ⅱ（34），山奈酚7-O-β-D-吡喃葡萄糖基（1→4）-β-D-吡喃葡萄糖苷（46），α-D-吡喃葡萄糖甲苷-6-（苹果酸-4-甲酯）-酯（47），仙人掌苷Ⅲ（48），其中仙人掌苷Ⅰ、Ⅱ、Ⅲ及4-乙氧基-6-羟甲基-α-吡喃酮均为α-吡喃酮骨架类型的新化合物。

Is a replaceable function, e. g. acetoxy, methoxy, their acyloxy and alkoxy homologs or halo .

是取化基，如乙氧基、甲氧基及它们的环氧和烷氧同系物或卤基。

A novel liquid crystalline compound named p-phenylenediamine di 4-[2- benzamide] was synthesized from allyl 2-hydroxyethylether, ethyl 4-hydroxybenzoate and p-phenylenediamine.

以乙二醇单烯丙基醚、对羟基苯甲酸乙酯、对苯二胺为原料合成了末端为不饱和双键的芳香聚酰胺溶致型液晶化合物——二对烯丙氧基乙氧基苯甲酰对苯二胺，最佳合成的摩尔比为∶羧酸∶对苯二胺∶吡啶=2。

A fully ethoxy-terminated polymethylsilsesquioxane has been prepared via a dehydration ethanolysis reaction between absolute ethanol and an ordered ladder-like HO-Me-T, which improved long-term storage stability of HO-Me-T. Meanwhile, EtO-Me-T can still participate in the cross-linking reaction with hydroxy-terminated PDMS in the presence of catalyst.

利用含端羟基的LPS与无水乙醇之间的催化脱水反应合成了一种乙氧基为末端基团的活性梯形聚甲基倍半硅氧烷，有效地改善该类聚合物的长期稳定性；同时，该乙氧基封端聚合物仍然具有活性，可以代替常用的正硅酸乙酯与羟基硅油进行交联反应。

In this thesis, the polymerization of triblock copolymer of styrene-butadiene-methyl methacrylate was carried out in glass flask ,with n-BuLi as initiator, 1,1-diphenylethylene as capping agent and Lithium 2(2-methoxyethoxy) ethoxide as additive.

本论文以n-BuLi为引发剂、1，1-二苯基乙烯为戴帽剂、2-(2-甲氧基乙氧基)乙氧基锂为添加剂，对玻璃聚合瓶中非极性-极性三嵌段共聚物聚苯乙烯—聚丁二烯—聚甲基丙烯酸甲酯的合成进行了研究。

Both catalytic activity and selectivity of Ru(PPh_3)_3Cl_2 were improved in ionic liquid BMImPF_6/DME medium.The conversion of hexene and selectivity ofβ-adduct for the hydrosilylation reaction of 1-hexene with triethoxysilane catalyzed by Ru(PPh_3)_3Cl_2 in ionic liquid BMImPF_6DME (V/V=1/4) medium at 90℃were 100% and 89.0%,respectively.

实验结果表明，在乙二醇二甲醚/离子液体1-丁基-3-甲基咪唑六氟磷酸盐(BMImBF_6)(V/V =1/4)介质中，于90℃下，己烯与三乙氧基硅烷反应的转化率为100%，β加成物的选择性可达89.0%，而用Rh(PPh_3)_3Cl作为反应的催化剂，在纯离子液体BMImPF_6中，就可以高效催化烯烃与三乙氧基氢硅烷的加成反应，过渡金属Rh(PPh_3)_3Cl，Ru(PPh_3)_3Cl_2催化剂/离子液体BMImPF_6催化体系，不仅解决了产物与催化剂分离困难这一难题，同时，离子液体BMImPF_6的存在提高了过渡金属Rh(PPh_3)_3Cl，Ru(PPh_3)_3Cl_2催化硅氢加成反应的活性，特别是β加成物的选择性。

Moreover, the preliminary test of the biological activity of the 8 target derivatives showed that 7-(2-adenine)ethoxyl-2-ethyl-4"- methoxy isoflavone and 7-(2-hydroxyl-3-piperidino)propoxy-2-ethyl-4"- methoxyl isoflavone have fine biological activities on suppression of the growth of MCF-7 cell in breast cancer and the hela cell in cervical cancer of human being.

另外还对8个目标衍生物进行了初步的药理活性试验，发现7-(2-腺嘌呤)乙氧基-2-乙基-4′-甲氧基异黄酮和7-(2-羟基-3-哌啶)丙氧基-2-乙基-4′-甲氧基异黄酮均有较好的抑制人乳腺癌MCF-7细胞和人宫颈癌hela细胞生长的药理活性。

This one mode pays close attention to network credence foundation of the businessman very much.

这一模式非常关注商人的网络信用基础。

Cell morphology of bacterial ghost of Pasteurella multocida was observed by scanning electron microscopy and inactivation ratio was estimated by CFU analysi.

扫描电镜观察多杀性巴氏杆菌细菌幽灵和菌落形成单位评价遗传灭活率。