Car horns toot as cyclists dart precariously through the traffic.

Sodium ethylate was used as catalyst in Baker-Venkataraman of cyclization, and all factors were studied.

环合反应采用乙醇钠作为Baker-Venkataraman重排反应的催化剂, 研究了影响反应的各个因素.

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Methods: Starting from diethanolamine, BP 897 was prepared via chlorination, cyclization, substitution aminolysis and condensation reaction.

方法: 以二羟乙基胺为起始原料, 经过氯化 、 环合 、 取代、肼解、缩合等反应合成BP897.

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Methods: Simvastatin was synthesized from lovastatin via acetylization, methylation, hydrolytic decomposition and cyclization reactions.

方法: 以洛伐他汀为原料,通过酰化 、 甲基化 、 水解、环合等反应合成了辛伐他汀.

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The effect of solvents and steric hindrance on the stereochemistry of cyclization is investigated in details.

并且考察了在环合反应中溶剂和空间位阻对立体选择性的影响.

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This paper describes the various cyclization reaction by neighboring group participation.

本文总结了邻基参与的各类环化反应.

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Application of samarium diiodide in mediating intramolecular cyclization reactions was reviewed.

综述了二碘化钐在分子内环化反应中的应用.

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METHODS Cilnidipine was synthesized from cinnamyl alcohol by esterification, feminization and condensation-cyclization.

方法以肉桂醇为原料,经酯化 、 氨化和缩合 - 环合而得.

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Menthol was obtained from lemon eucalyptus oil via cyclization and catalytic hydrogenation.

以柠檬桉叶油为主要原料经环化、催化氢化二步反应得到薄荷醇.

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Sulfuric acid and acetic anhydride were used as a cyclizing agent to prepare Ofloxacin intermediate.

用硫酸乙酐混合物作环合剂,制备了氟嗪酸中间体.

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According to the control characteristics of cyclo converter, paper proposes a new multi-CPU computer control system.

根据交-交变频器的控制特性, 提出了较为新颖的多CPU计算机控制系统结构.

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The feasibility of the new cyclo converter and its performancesteady state are validated by simulation.

通过仿真计算验证了其反送功率至工频系统可行性.

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Silazanes were divided into chain-silazane, cyclo-silazane and poly-silazane according to the material variety and synthesis method.

硅氮烷根据原料以及合成方法的不同可分为链 硅氮 烷、环硅氮烷、聚硅氮烷等.

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AC excited generator ( ACEG ) and cyclo converter are principal harmonic sources in ACEG systems.

交流励磁 电机和交交变频器是交流励磁电机系统中最主要的两个谐波源.

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Finally , cyclo (-Ab 7-Aib-Phe ( 2-Me )-D-Pro-) is successfully prepared by using liquid phase peptide synthesis with Boc protection.

Boc -Ab7-Aib-Phe( 2-Me)-D-Pro-OBzl脱除两端保护得到线性肽链经过环化得到目标产物cyclo ( -Ab7-Aib-Phe ( 2-Me ) -D-Pro- ),收率0.8%.

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The synthesis of cyclo (-Ab 7-Aib-Phe-D-Pro-) which uses solid phase peptide synthesis with N-Fmoc protection is faild.

本论文尝试用固相法氨基酸N端Fmoc保护策略合成cyclo ( -Ab7-Aib-Phe-D-Pro- ).但是最终产物经ESI-MS分析不是目标产物,故改用液相法合成目标化合物.

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The cycloaddition itself is the slow step.

环化作用本身是慢的一步.

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Asymmetric 1, 3-dipolar cycloaddition can be strongly catalyzed by chiral oxazaborolidines.

手性唑硼烷酮能够催化不对称1, 3偶极加成反应并取得很好的效果.

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This article details the cyclohexanone production process by liquid cyclohexane oxidation and its improvement.

介绍了环己烷液相氧化法生产环己酮的工艺以及其改进情况.

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The dispersion of inorganic agent in polypropylene was simulated by using cyclohexane as a dispersion medium.

采用环己烷作为分散介质来模拟无机抗菌剂在聚丙烯中的分散性.

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Research progress on several new processes of cyclohexanone production by cyclohexane catalyzed oxidation is also introduced.

同时,还介绍了几种环己烷催化氧化制环己酮的新工艺研究进展.

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