关环,cyclization英语短句,例句大全

关环,cyclization
1)cyclization[英][,saikli'zei??n][美][,sa?kl?'ze??n, ,s?kl?-]关环
1.In our reactions,existing of a little water promoted the cyclization,and made the reduction and cyclization steps be accomplished in a single operation.以L-酪氨酸为原料合成了化合物1和化合物2,化合物2与NaBH4在THF下回流过夜,还原完毕后加少量水继续回流7~8 h就可直接得到关环产物3,总产率为40。
2.2,4-ditrichloromethyl-6-methyl-1,3,5-triazine(chloro-triazine), which was the intermediate of 2-methylamino-4-methoxyl-6-methyl-triazine, was synthesized from tritox through cyclization.以乙腈为起始原料,经氯气氯化得到三氯乙腈,催化关环得2,4 双(三氯甲基)-6-甲基-1,3,5均三嗪(简称氯嗪),产物含量>98%(面积归一法),收率>50%,以该化合物合成2 甲氨基 4 甲氧基 6 甲基-三嗪(简称三嗪)的成本比老工艺"三聚氯氰"和"双氰胺钠"路线均降低50%以上,并且环境友好,已经实现工业化。
3.2-Chloro-6-chloromethylbenzothiazole was synthesized from ethyl 4-aminobenzonic via five-step reactions including cyclization, diazotization bromination, substitution, reduction and chlorization.4-氨基苯甲酸乙酯在乙酸中与硫氰化钾,溴素关环反应得到2-氨基-6-羧乙基苯并噻唑,用亚硝酸叔丁酯/溴化铜重氮化溴化得到2-溴-6-羧乙基苯并噻唑,再与硫氢化钠发应得到2-巯基-6-羧乙基苯并噻唑。

英文短句/例句

1.Of, relating to, or associated with the environment.环境的环境的，有关环境的
2.Tandem Ring-Opening/Closing Reactions of N-Ts Aziridines and Aryl Propargyl Alcohols氮杂环丙烷和芳基炔丙醇的串联开环关环反应
3.environmental follow-up有关环境的后续行动
4.A Note on Strongly Armendariz Rings and Strongly Quasi-Armendariz Rings关于强Armendariz环和强拟Armendariz环
5.There is no ambiguity about the ring A.关于环A没有疑义。
6.On the Extension of Armendariz Rings;关于Armendariz环的推广
7.On Weak Linear Armendariz Rings关于弱线性Armendariz环
8.CYCLE IGNITION SWITCH OFF THEN BACK ON.关循环开关，然后后靠。
9.Of or relating to the circulatory system.循环系统的循环系统的或与循环系统有关的
10.Of, relating to, or dependent on circumstances.依照环境的依照环境的，与依照环境的有关的
11.of or relating to or shaped like a toroid; doughnut shaped.属于、关于或形状象环形、园环形。
12.relating to circulatory system or to circulation of the blood.关于循环系统或血液循环的。
13.A Research on Relationship between University Students Environmental Awareness and Environmental Behavior;大学生环境意识与环境行为关系研究
14.Build few crucial links of environmental friendly type society;建设环境友好型社会的几大关键环节
15.On the Relationship between Environmental Protection and Circulating Economy Development;试论环境保护与发展循环经济的关系
16.Analysis on the Relations between FDI、Enviroment Pollution and Enviroment Regulations of Guangdong ProvinceFDI、环境污染和环境规制的相关性分析
17.A Research of the Relationship among FDI, Environmental Regulation and Ecological EnvironmentFDI、环境规制与生态环境关系研究
18.Study on Relationship among Environmental Capacity Threshold,Environment Quality and Environmental Kuznets Curve环境承载阀值、环境质量与EKC关系研究

相关短句/例句

ring closure关环
3)key link关键环节
1.The importance of examines and value supervision and analysis on key links;验工计价监理的重要性及关键环节分析
2.The five key links in cost management;成本管理的五大关键环节
3.This paper unifies the collection-control substation operation management and summaries the misoperation reason and combs the key link to prevent the electrical.本文结合集控站的运行管理,总结引发误操作的原因,梳理出现场防止电气误操作的关键环节,做好防止误操作的安全控制,杜绝误操作的发生。
4)Closed ring by acid酸关环
5)environmental public relations环境公关
6)key step关键环节
1.Analyzing the current system mechanism,the paper discussed the key step in the system mechanism reform of medical service.通过对现行体制机制的分析,探讨医疗服务体制机制改革的关键环节。
2.Combined with the experiences of Shaanxi Electric Power Design Institute acting as engineering general contract,the advantages and existed problems are analyzed for design institute to execute engineering general contract,the basic qualification which is necessary to execute engineering general contract and the key step during the execution process are discussed.结合陕西电力设计院实施工程总承包项目的实践经验,就设计院实施工程总承包的优势、存在问题进行分析;对设计院开展工程总承包业务必须具备的条件及实施工程总承包的关键环节等进行探讨。