反应的

The optimal idle time of polyreaction and gel time can be determined by changing initiator content,temperature and acetylacetone content to make sure the casting process can be done successfully.

通过改变引发剂用量、环境温度以及缓凝剂用量可以控制聚合反应的诱导期，从而保证浇注过程的顺利进行，有利于制备均匀性好、致密度高的反应烧结B_4C/SiC陶瓷坯体。

A highly regio- and stereoselective diboration of allenes was achieved with a catalytic amount of phosphine-free Pd complex and alkenyl or aryl iodide.

双硼试剂加成到1，2双烯的反应，传统上利用Pt金属错合物为催化剂，根据文献的报导，单独只使用Pd金属错合物是无法进行此反应的。

The tin hydride mediated alkenyl radical translocation/ cyclization process developed by Curran et al. represents a powerful procedure for the preparation of functionalized fivemembered rings by selective activation of a CH bond.

Curran等开发的以锡氢化物作为炔烃基团转位/环化反应的介质代表了用碳氢三键选择性活化法制备五员环官能团的高效反应步骤[2，3]。

A face-selective coordination of allene to the palladium center is proposed to account for the present stereoselectivity.

此加成反应的反应机构是经由I-B键氧化加成而启动的，并不是直接B-B键的氧化加成。

This article summarizes the latest research progress of the allylation reaction mediated by metals in aqueous media, and the new reaction mechanism is explained briefly.

本文综述了水相中金属参与烯丙基化反应的最新研究进展，并对新的反应机理作了简要的阐述。关键词：谢斌，冯建申邹立科，张秀兰

In this paper,four new methods of synthesis aminoacetic acid are introduced.

综述了催化合成氨基乙酸的工艺及反应条件，分析了各种反应的影响因素和特点，展望了氨基乙酸的生物合成技术前景。

Reported that approximately 15% of patients who were treated with intravenous N-acetylcysteine had an anaphylactoid reaction within 2 hours after the initial infusion and that increasing the infusion time from 15 to 60 minutes did not alter the rate of adverse events.

Kerr等人报道大约15%的静脉注射N-乙酰半胱氨酸的病人在首次注射后2小时内出现过敏样反应，增加注入时间在15-60分钟内并不会改变副反应的发生率。

10-arylmethylene anthrone pyridine compounds and the raw materials for the reaction conditions, join in alkaline, phase transfer catalysts and acceleration response, KI synthesis of containing pyridine 10,10 - dialkyl anthraquinone.

以蒽酮和含吡啶基的化合物为反应原料，在碱性条件，加入相转移催化剂和KI加速反应的进行，来合成含吡啶基的10，10-二烷基蒽酮。

Under the optimum reaction conditions,:benzalacetone:Ru:KOH=1000:1:20, 2 MPa, 30℃, and 2h, the conversion and the selectivity toward the unsaturated alcohol was reached 99% and 99%, respectively, and the ee value of unsaturated alcohol was over 58.9%.

在优化的反应条件下，苄叉丙酮加氢反应的转化率大于99％，生成α，β-不饱和醇的选择性大于99％、对映选择性达到了58％ee以上。

Therelative rates of the Rh-mediated carbenoid insertion into the benzylic C - H bonds of aseries of para-substituted phenyl substrates: methyl 2-diazo-3-oxo-6-(4-substituted phenyl)-4-propylhexanoate 47a - g, have been measured by an indirect intramolecular competitionmethod under the condition in which the possible steric and conformational effects have beenminimized.

为了将立体因素和构象因素最大程度减小，以便较为准确地评价电子效应对该反应的影响，设计并合成了不同对位取代基的化合物4-丙基-6-(4-取代苯基)-2-重氮基-3-氧代己酸甲酯47a-g，并研究了它们在不同Rh催化剂作用下的分子内C-H插入反应。

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。