取代剂

Results: The best formulation of Picamilon sodium dispersible tablets was composed of Picamilon sodium 50mg, brushite 120mg, Ldisplace-hydroxypropyl cellulose and sodium carboxymethyl starch 16mg and 2% polyvidone k30 queous solution quantity sufficient.

结果：优化处方组成：主药匹卡米隆50mg、磷酸氢钙120mg、崩解剂羧甲基淀粉钠和低取代羟丙基纤维素分别为16mg，粘合剂2%聚维酮K30水溶液适量。

The disubstituted ureas and the catalyst could be separated by addition of water and the catalyst could be reused without deactivation.

新型高效的菲咯啉钯-离子液体含氮化合物羰化催化剂体系，以苯胺为反应物时该体系的转化频率可以达到6000mol/mol/h；氢氧化铯-离子液体催化剂体系，可以在不加入化学计量脱水剂的条件下活化二氧化碳与脂肪族胺反应得到二取代脲，反应结束后可以通过加入水实现产品和催化剂体系的分离，催化剂体系可以重复使用。

Based on the development of homogeneous gold complex catalyst, the polymer immobilized nano-gold catalyst was also prepared and used for oxidative carbonylation of amines or activation of carbon dioxide to carbamates and disubstituted ureas without addition of any co-catalyst and dehydration agents with greatly enhanced catalytic activity (TOF≈3000mol/mol/h).

同时，纳米金可以催化活化二氧化碳与脂肪族胺反应制备二取代脲，避免了传统上二氧化碳活化所大量使用的脱水剂，是当前文献报道最高效的胺与二氧化碳反应的催化剂体系（TOF≈3000mol/mol/h）。

Then sodium ethoxide was used as base,the nucleophilic substitution of 2-pyrrolidone with the intermediate provided nefiracetam.

以碳酸钠为缚酸剂，摩尔比为1︰1的2，6-二甲基苯胺与氯乙酰氯反应合成了中间体2-氯-N-(2，6-二甲基苯基)乙酰胺；在强碱乙醇钠作用下，2-吡咯烷酮再与2-氯-N-(2，6-二甲基苯基)乙酰胺经亲核取代合成了目标化合物奈非西坦。

Effect of metal salts of substituted aromatic heterocyclic phosphate on the properties and morphology of isotactic polypropylene were studied.

研究了不同的取代芳基杂环磷酸金属盐类成核剂对等规聚丙烯性能及其微观形态的影响。

In searching for novel and high active fungicides with pyridyl moiety, with Dimethomorph as a model compound and isonicotinic acid as the main starting material, twenty-seven title compounds were designed and synthesized through chlorination, Friedel-Crafts acylation, Wittig-Horner reaction and other steps. All the target structures were confirmed via 1H NMR and elementary analysis.

为了寻找具有高活性的含吡啶杂环杀菌剂，以烯酸吗啉为模板化合物，以异烟酸为起始原料，通过卤代反应、Friedel-Crafts酰基化反应、Wittig-Homer反应等，将吡啶－4-基或2-氯吡啶－4-基引入到模板结构中，设计合成了27个4-［3-（吡啶－4-基）－3-取代苯基丙烯酰］吗啉类化合物，其结构通过1H NMR和元素分析确证。

The influence of the use level of base and monochloroacetic acid on the degree of substitution in CMS,the influence of DS and H/Na(ratio of free and salified carboxylic acid in CMS)on swelling and disintegrating of CMS have been discussed.

考察了碱和一氯乙酸用量对CMS取代度的影响及DS和CMS中游离羧基和成盐羧基比对崩解剂吸水溶胀性能的影响。

The main research now is focused on the polymerization of difluoramino substituted oxetane monomers, the preparation of neopentyl difluoramino nitrato plasticizers, and the molecular design and synthesis of cyclic N2 nitramino geminal difluoramino oxidizers.

目前该领域的研究工作主要集中在二氟氨基取代环氧丁烷聚合物合成，新戊基二氟氨基硝酸酯增塑剂制备，以及环N2硝胺基偕二氟氨基氧化剂的分子设计与合成上。

Alidase was prepared by coupling silica-gel spheres already carrying γ-aminopropyltriethoxy-silane with glutaraldehyde, and then with N-(p-aminophenyl) oxamic acid.

将γ氦丙基三乙氧基硅烷取代的微球硅胶先后与戊二醛，对氨基苯草氨酸结合，制成了一种新的吸附剂，用于唾液酸酶的亲和提纯。

Monododecylphosphate was prepared by esterification of lauryl alcohol with phosphoric acid(mass fraction 85%) on cesium phosphotungstate catalyst.

以磷钨酸铯盐为催化剂，由月桂醇和85%的磷酸直接酯化合成单十二烷基磷酸酯，考察了带水剂种类、反应时间、磷钨酸铯盐催化剂中的铯取代数、催化剂用量和月桂醇与磷酸摩尔比等条件对磷酸转化率及单十二烷基磷酸酯选择性的影响。

In the United States, chronic alcoholism and hepatitis C are the most common ones.

在美国，慢性酒精中毒，肝炎是最常见的。

If you have any questions, you can contact me anytime.

如果有任何问题，你可以随时联系我。