查询词典 intermediate cuneiform bone

We researched on the prepartion of pivotal intermediate 2 and 3 for 1 P-methyl carbapenem antibiotics from intermediate 1, which is subjected to Reformastky reaction, N-alkylation, Dieckmann-type cyclisation, enolization, ester condensation etc. in sequence. The synthesis route of document is optimized by us.

我们研究了1β-甲基碳青霉烯类重要中间体的合成，从中间体1出发经Reformastky反应、水解反应合成出中间体2；经Reformastky反应、烷基化、Dieckmann环合、烯醇化、酯化合成出中间体3，并对其中各步反应作了优化和探索。

In situ FTIR spectroscopic studies suggest that ethylene dialkoxide(-OCH_2CH_2O-) is an intermediate over polymeric Mo species while ethoxide(-OC_2H_5) might be an intermediate over the monomeric Mo species.

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The results show that this reaction proceeds in two step: 1 silylene and formaldehyde form an intermediate complex, which is a kind of exothermal reaction with no barrier; 2 the intermediate complex isomerizes to sive the product. The barrier for the second step is 51.4kJ·mol^-^1 at MP2/6-31G^*//6-31G^* level (with zero-point energies correction). In view of dynamics and thermodynamics, it is between 300～400K that the reaction will have not only larger spontaneous tendency and equilibrium constant but also quicker reaction rate.

结果表明，此反应历程由两步组成：1硅烯与甲醛生成一中间配合物，是一无势垒的放热反应，2中间配合物异构化为产物，此步势垒经零点能校正后只有51.4kJ·mol^-^1(MP2/6-31G^*//6-31G^*)；从热力学和动力学的综合角度考虑，该反应在300～400K温度下进行为宜，如此，反应既有较大的自发趋势和平衡常数，又具有较快的反应速率。

The paper analyses ideographically the pertinence and dialectical relationship of logistics industry with the development of national economy and the adjusting of industry structure, analyses the characters of logistics industry enterprise-spread and enterprise-relationship as a kind of industry from the point of industry-related, explained the analysis route of the effect of logistics industry with other industries on base of enterprise-spread and industry"rate of intermediate demand"and"rate of intermediate devotion".

文章具体分析了物流业与国民经济发展及产业结构调整的相关性联系和辨正关系，并主要从产业联系的角度分析了物流业自身作为一种具体的产业所具有的产业波及效应和产业关联的特点，提出了基于产业波及的物流产业与其他产业影响的分析路径，并根据这一分析思路详细分析了物流业对第三产业的提升效应和对其他产业的带动效应，通过计量分析工具对物流产业发展与产业结构之间的关系进行了实证分析，有力的说明了发展物流产业对优化产业结构的作用。

Many Oriental are round face model, but many moonfaced people like the cent intermediate to seam, the hair is clingy scalp, intermediate cent is seamed, make the face appears rounder; Some still likes in the future to comb or the hairstyle of take everything into one's own hands, can make a face bigger, rounder only so.

不少东方人是圆脸型，但不少圆脸的人喜欢中间分缝，头发紧贴头皮，中间分缝，使脸显得更圆；有的还喜欢往后梳或一把抓的发型，这样只会使脸更大、更圆。

Usage: useful for pharmaceutical intermediate, especially useful for intermediate of synthesis aids inhibitor and metallocen catalyst for olefine polymerization.

用途：用作有机功能材料，医药合成中间体以及烯烃聚合用金属茂络合物催化剂配位体。。

Usage: useful for pharmaceutical intermediate,especially useful for intermediate of synthesis aids inhibitor and high temperature resistant resins and metallocen catalyst for olefine polymerization.

用途：用作各种医药合成中间体，特别是抗艾兹病药物，治疗糖脲病药物以及治疗心律不齐病药物的中间体以及烯烃聚合用金属茂络合物催化剂配位体和透明的耐热性树脂原料。

Organotin intermediate was detected and a mechanism involving the formation of organotin intermediate was proposed based on the experimental results.

本方法对醛和酮的具有很高化学选择性，并在反应过程中检测到有机锡中间体，阐明了反应机理。

Human movement,especially the destruction of vegetation,influenced the propagation environment of the intermediate host of paragonimus,which resulted in the transference of territory of wild animal and the marked decrease of the density and the infection rate of the intermediate host.

人类活动使并殖吸虫中间宿主滋生的微生态环境发生改变，特别是植被破坏，造成野生动物活动范围的迁移，是导致中间宿主密度和感染率下降的主要原因。

Aldol condensation 2, 5-dimethoxymethoxyacetophone with 2, 4, 6 -tri methoxymethoxybenzendehyde, then hydrogenation, reductive, the key intermediate 83 (84) of natural product 3, 5, 7, 2′, 5′- pentahydroxyflavan, was obtained; Mini reviewed EGCg activity, Then gallic acid and phloroglucin were used to synthsis EGCg, The key intermediate Chalcone 109 of EGCg was abtained through 7 steps from gallic acid.

重点介绍了以没食子酸为原料，经酯化，保护，还原，氧化，格氏反应，氧化六步反应得到3，4，5-三苄氧基苯乙酮，以间苯三酚为原料，经维斯迈尔反应，苄基保护，甲氧甲氧基保护三步反应得到2，4-二苄氧基-6甲氧甲氧基苯甲醛，酮106与醛108经羟醛缩合得到EGCg重要反应中间体查尔酮109。

Panorama Many people are dancing in a large sitting room.

在一个大客厅里，许多人在跳舞。

We fully understand how a microwave oven cooks food, it is first necessary to talk ...

我们充分理解一个微波炉煮的食物，这是首先要谈。。。