查询词典 lactic amide

Under the guidance of the principle of independence and self-reliance, thesubstituted amide-type A-101 extractant has been successfully synthesized.

本文叙述了在独立自主、自力更生的原则指引下，研制成功酰胺型萃取剂，以及应用于稀有金属的提取和分离的许多有成效的示例。

Objective:To synthesize p-hydroxybenz amide s glucoside derivatives.

目的：合成对羟基苯甲酸葡萄糖苷酰胺类衍生物。

The X-ray structure analysis reveals that the metal is in a square-planar N2O2 coordination environment formed by the phenolate-O, the imine-N and the deprotonated amide-O atoms of hydrazone ligand and the N atom of Himdz.

配合物的晶体结构分析表明，中心金属通过酰腙配体的酚基氧原子、亚胺基氮原子、去质子酰胺氧原子以及咪唑的氮原子形成平面四方形的N2O2配位环境。

The results indicated that the thermal stability of thepolymers is greatly associated with the structure of the modified groups.Moreover, the imide- derivatives have greater thermal stability than thecorresponding amide- derivatives. This can provide useful information on thepreparation and processing of this kind of polymers.

用PyGC-MS对酰胺型和酰亚胺型改性聚乙烯在加工条件下的热分解产物进行了定性和定量的测定，结果表明不同改性基团对聚合物热稳定性有很大影响，酰亚胺型改性聚乙烯的热稳定性大于酰胺型，这为该类聚合物的制备加工和应用提供了有用的信息。

A new kind of non-ionic surfactant methyl glucose amide was prepared by using oleic acid, glucose and methylamine as raw materials.

以油酸、葡萄糖、甲胺等为原料合成一种新型非离子表面活性剂油酸改性甲基葡萄糖酰胺。

Typical materials are cement, quartz, feldspar, calcite, gypsum, limestone, dolomite, graphite, fluorite, aedelforsite, phosphate ore, fused calcium-magnesium phosphate, car amide, electrolytic manganese metal, ferromanganese, coal, gangue, slag, zirconium, steatite, granite, orthoclase, marble, barites, ceramics, glass, etc.

典型材料是水泥，石英，长石，方解石，石膏，石灰石，白云石，石墨，萤石， aedelforsite ，磷矿石，电熔钙镁磷肥，汽车酰胺，电解金属锰，锰，煤，煤矸石，炉渣，锆，滑石，花岗岩，钾长石，大理石，重晶石，陶瓷，玻璃等。

NMR and ESI-MS techniques were used to study the interactions between diperoxovanadates and small organic molecules such as pyridine, imidazole, arginine, picoline ester, and picoline amide. Spectroscopic methods were established to explore this type of interactions.

在合成数种双过氧钒化合物的基础上，利用多种NMR技术结合ESI-MS等谱学方法系统研究了双过氧钒化合物和咪唑、吡啶、取代吡啶、精氨酸、皮考啉酯以及皮考啉酰胺等有机配体的相互作用，建立了一套适合研究过氧钒化合物与有机小分子相互作用的谱学方法。

With L-DOPA as the starting chiral phenylalanine derivatives, construction of the skeleton of Phthalascidin was studied. Firstly, starting from L-DOPA and 3,4-dimethoxyphenylalanine, an amide 〓 was obtained, and a modeling cyclization reaction was carried out but failed to give the anticipated product.

二、对由苯丙氨酸甲酯衍生物通过Bischler-Napieralski反应合成四氢异喹啉—3—甲酯进行了研究，通过研究首次发现，生成苄基噁唑的反应是正常的B-N反应的竞争性反应，并从机理上给予了解释，所得出的结论具有一定的规律性，在杂环的合成方面具有一定的应用价值。

The synthesis of the pentacyclic skeleton of Et-743 and the construction of the five chiral centers thereof.1. The core pentacyclic skeleton of phthalascidin was constructed with L-dopa as the starting material via thirteen steps. First, two basic synthons, the C-1 functionalized tetrahydroisoquinoline compounds 8 and N-protected Z-dopa derivative 9, were prepared from L-dopa. They were coupled via amide bond to form the dipeptide compounds 10, which were the first key intermediates. Then the primary hydroxyl groups were transformed into the corresponding amino aldehydes 11 via Swern oxidation. Followed by the intramolecular Pictet-Spengler cyclization, the pentacyclic compounds 12 were synthesized.

五环骨架的构建及五个正确手性中心的确立：1.1我们以L-多巴为起始原料，经过多步官能团保护和转化合成了基本结构单元8然后和苯丙氨酸衍生物9，通过缩合反应生成酰胺中间体10，经Swern氧化得到醛化合物11，然后再次利用分子内改良的Pictet-Spengler反应一步构建c，d两环，得到五环骨架化合物12，最后，实现了21-位羰基向氰基的转化，得到了C-1位官能化的化合物14，化合物14不但具有和Et-743一致的五环骨架，而且分子中五个手性中心立体构型也与其完全相同：其中，3，位和13，位的手性中心由原料L-多巴带入，而1，位，11，位和21，位手性中心则通过不对称诱导而确立。

Michael addition reaction must be carried out in the base of the catalyst, the alkali used are: sodium, sodium ethoxide, sodium hydride, sodium amide ...

迈克尔加成反应必须在碱的催化下进行，常用的碱有：金属钠、乙醇钠、氢化钠、氨基钠。。。

A historical region of southwest France between the Pyrenees and the Garonne River. The duchy of Aquitaine was joined with France after the marriage of Eleanor of Aquitaine to King Louis VII in1137, but its possession was disputed after her subsequent marriage to Henry II of England.

阿基坦法国西南部一个历史地区，位于比利牛斯山和加隆河之间，在1137年阿基坦的埃莉诺与国王路易斯七世结婚之后阿基坦公国加入法国，但当她再嫁英国亨利二世后，其归属权便受到争议

There are moments when I look at the smiling , happy faces of my expectant staff and wonder how they will cope when confronted by an outraged housemaster along with an unrepentant and recalcitrant bleached blond teenager in 18 years ' time .

有时候，我看着那些满怀期待的员工微笑，幸福的脸，想着当他们遇到一位愤怒的宿舍管理员和一位不知悔改，叛逆，而且将头发染成白色的18岁少年时，他们会如何处理。