cyclization

Cyclization occurs readily with dilute alkali.

遇到稀碱就容易环化.

Study on Synthesis of Dioxane from Catalytic Cyclization of Diethylene Glycol

一缩二乙二醇催化脱水制取1,4-二氧六环的研究

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.

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.

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.

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.

The product 1-Bromine-5-phenyl-tetrazole was synthesized from benzonitrile, Br_ ( 2) and sodium azide by cyclization and bromization.

以苯甲腈、叠氮钠、溴等为原料，经偶合，溴化合成了1-溴-5-苯基四氮唑。

The phenomonon was explained in view of the mechanism of chemical cyclization of amic acid.

从聚酰胺酸化学环化反应机理出发对这一结果给予了解释.

During the foaming and heat treatment, a series of cyclization reactions and crosslinking reactions happen in AN/ MAA copolymer foam and form cyclic hexahydroxy imide, short ladder structure and amide central crosslinking.

发泡和热处理过程中，AN/MAA共聚物泡沫塑料发生了一系列复杂的成环反应和交联反应，形成了六元酰亚胺环结构、短梯形结构以及酰胺键交联结构。

Aqueous titanium trichloride promoted intermolecular reductive cyclization of 1,2-diketone and o-nitroaniline in basic media provides a convenient method for the synthesis of quinoxaline derivatives.

本文研究了三氯化钛水溶液作用下，邻硝基苯胺与1,2-二酮在碱性介质中分子间的成环反应，提供了一个方便地合成取代喹喔啉类化合物的方法。

The condensation-cyclization cascade reaction of aromatic aldehyde with two equiv of 4-hydroxy-6-methyl-pyrone in the presence of acetic anhydride was studied by using ionic liquid as both reaction medium and promoter.

研究了在离子液体介质中，芳香醛和两分子6-甲基-4-羟基吡喃酮在乙酸酐存在下的缩合成环反应，并通过该反应合成了一系列双吡喃酮并吡喃类化合物。

The N of indole-3-propionic acid is protected by pivaloyl chloride, and then thionyl chloride and aluminum chloride for acylation cyclization. 2.

用特戊酰氯对吲哚-3-丙酸上的N进行保护，然后用氯化亚砜和三氯化铝进行酰化反应关环。

The current preparing methods of cyclic polymer are the intramolecular cyclization of the telechelic polymer in dilute solution.

当前环型聚合物的制备方法主要采用高稀释条件下遥爪聚合物的分子内闭环反应。

Designing cyclization reaction tank for caffeine production

咖啡因车间闭环反应罐的设计

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.

The advances in syntheses of AEMs, including different cyclization methods, solid-phase synthesis, template synthesis and aggregation driven cyclization are summarized.

评述了采用母板复型法合成金属有序纳米孔道阵列模板合成方法、金属模板的特点及应用的研究进展。

Method ( 2H)-2-cyclohexyl-3,4-dihydropyrrolo [ 1,2-a] pyrazin-1-one was synthesized from methyl pyrrole-2-carboxylate via substitution and cyclization, and the target compounds 6-aryl derivatives were obtained by Friedel-Crafts reaction.

方法以2-吡咯甲酸甲酯为原料，经取代、环合，制备（2H）-2-环己基-3,4-二氢吡咯[1,2-a]吡嗪-1-酮（3）；通过Friedel-Crafts酰基化反应，制得其6-酰基衍生物4a~4j。

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.

Levocetirizine Dihydrochloride was prepared from benzoyl chloride by acidylation, hydrogenation, cyclization with an overall yield of 8.05 %.

以苯甲酰氯为原料,经酰化, 还原, 环合等反应合成左旋西替利嗪盐酸盐,反应总收率为8.05%.

In the first route, itwas synthesized by cyclization reaction, bromination, condensation, Royer reaction, reduction, nucleophilic substitution ( total six steps) starting from β-phenyl ethanol in5% total yields.

第一条路线以β-苯乙醇为原料，经过环化、溴化、缩合、Royer成环、还原和亲核取代共6步反应合成了SK&F101468A，总收率约为5%；

The major process to study DNA instinctive flexibility is DNA cyclization assay.

DNA分子的环化是研究其本身柔韧性的主要方法。

Low substituted dibenzo [ fg, op] naphthacenes were synthesized by using Friedel-Crafts acylation, tadem aldol-Michael solvent-free reaction and palladium catalyzed dehydrohalogenation cyclization as key steps.

以傅克酰基化反应、串联的Aldol-Michael反应及Pd-催化的脱卤化氢环化反应为关键步骤，合成了低取代的二苯并并四苯衍生物（DBN）。

Chrysophanic acid ( 6) in total yield of 40.4% was synthesized from 3-nitrophthalic acid by dehydration, Friedel-Crafts acylation, reduction, diazotization, hydrolysis and cyclization.

以3-硝基邻苯二甲酸为原料，经脱水、傅克酰基化、还原、重氮化、水解和环合反应合成了大黄酚（6），总收率40.4%。

Titanium Trichloride Promoted Reductive Cyclization of Ketone and Nitro-compound

三氯化钛促进的酮与硝基化合物的还原环化反应

Screening for2-bromo-butyric acid as the starting material, after ammonolysis, esterification, ester amine solution, split, five-step cyclization reaction Levetiracetam.

筛选以2-溴代丁酸为起始原料，经氨解，酯化，酯胺解，拆分，环合五步反应制得左乙拉西坦。

This reaction used arylamines and N-alkyl lactams as substrates to form a series of tetrahydroquinoline derivatives via intermolecular coupling and cyclization reactions.

反应以芳基胺和N-烷基内酰胺为原料，分子间关环合成了一系列四氢喹啉衍生物。

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.

Only in gradually increasing temperature ranges can the stabilization reactions be totally completed, there are also interactions between adjacent stages and interactions between oxidization and cyclization.

不熔化反应需要在梯度升温的过程中才能进行完全，而且反应的前后阶段相互影响，氧化反应和环化反应也相互影响。

Study progress on cyclization of citronellal to (-)-isopulegol over catalysts is reviewed.

综述催化香茅醛环化为（-）-异胡薄荷醇的催化剂研究进展。

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.