查询词典 cyclopentanone

Mainly engaged in: Hydrogen-imide hydrochloride, o-chlorophenyl cyclopentanone, 3.4 dimethoxy ethyl benzene, butyn single potassium acid, potassium ethyl malonyl, Ding amide, amide isobutyraldehyde , allyl chloroacetate, isopropyl chloroacetate Benzyl aluminum, cyclopentene, cyanide-o-chlorophenyl, o-methyl chloride, sulfuric acid chloride, p-chlorophenol, imidazole, Pinacolone, one chlorine Pinacolone.

主要经营：盐酸氢亚胺、邻氯苯基环戊酮、3.4二甲氧基苯乙酯、丁炔二酸单钾盐、丙二酸单乙酯钾盐、丁酰胺、异丁酰胺、氯乙酸烯丙酯、氯乙酸苄酯异丙醇铝、环戊烯、邻氯苯氰、邻氯苯甲酯氯、硫酸氯、对氯苯酚、咪唑、频呐酮、一氯频呐酮。

The facts that type I compounds could easily undergo deamination reaction to form α-methylene cyclopentanone derivatives and they could react with glutathione to form an adduct provided sufficient evidence for the hypothesis that the compounds acted as masked α-methylenecyclopen- tanones and reacted with biologically important sulfhydry-containing enzymes, and thus produced anticancer activity.

Ⅰ类化合物在稀溶液中极易进行去胺基化反应形成α-亚甲基环戊酮类化合物。并且Ⅰ类化合物于稀溶液中易与谷胱苷肽进行结合，这些事实为Ⅰ类化合物作为隐蔽的α-亚甲基环戊酮与酶进行加成，从而导致酶失活而具有抗癌活性的设想提供了证据。

The author has studied the kinetics of hydrogenation of a,β-unsaturated aldehydes andketones such as cinnamaldehyde and 2-butylene cyclopentanone,β-ionone over amorphousalloy NiB catalyst at atmospheric pressure of H2 as well as effects of reaction conditions onthe kinetics.

作者以肉桂醛和2-亚丁基环戊酮、β-紫罗兰酮为代表重点研究了非晶态NiB催化α，β-不饱和醛酮常压下选择加氢的反应动力学。常压下该反应是准一级反应。

Aim To design and synthesize a series of 2--(4-cyclopentyloxy-3-methylbenzylidene)cyclopentanone arylamine Mannich bases,and to determine their antitumor activities in vitro.

目的设计合成一系列2--(4-环戊氧基-3-甲氧基苯亚甲基)环戊酮Mannich碱类化合物，并对其抗肿瘤活性进行体外试验。

Methods The target compounds were synthesized by Stock enamine reaction,Williamson reaction,Mannich reaction,and arylamine exchange reaction with cyclopentanone as starting material,and their antitumor activities were assayed using human hepatic carcinoma cell line(Bel-7402),human oral cavity epidermis squamocellular carcinoma cell l...

方法以环戊酮为原料，经Stock反应、Williamson反应、Mannich反应和芳胺交换反应合成目标化合物。

The observation that 2-Alkylidene or Benzylidene cyclopentanones had little anticancer activity and 2-dimethylaminomethylcyclopentanone hydro- chloride (T59) had low anticancer activity proved that the existance of α,β-unsaturated carbonyl group could enhance the anticancer activity of cyclopentanone Mannich bases.

2-亚烷基、苯亚甲基环戊酮无抗癌活性，2-二甲胺甲基环戊酮盐酸盐（T59）抗癌活性较低，这些事实说明Ⅰ类化合物中的环外不饱和双键是一个增效基团，它的存在能明显增强环戊酮Mannich碱的抗癌活性。

Five types of compounds were synthesized via modification of the leading compounds, Mannich bases of cyclopentanones. Among the target compounds, one type was aromatic amine derivatives of a leading compound, three were Mannich bases of a - benzylidene cyclopentanone, the fifth was a Mannich base of a - benzyl cyclopentanone.

以具有抗炎活性的环戊酮Mannich碱为先导化合物进行结构改造，设计合成了一类已知化合物的芳胺Mannich碱衍生物，三类α-苯亚甲基环戊酮Mannich碱类化合物，一类α-苄基环戊酮Mannich碱类化合物。22个目标化合物的结构经核磁共振氢谱、红外光谱和质谱检测确证。

It could be synthesized by a key intermediate 2-pentylidene cyclopentanone formed a condensation starting from cyclopentanone and n-valeraldehyde, followed by isomerization, Michael addition and a selective decarboxylation.

本文研究了以正戊醛和环戊酮为基本原料，经缩合反应、异构化反应、Michael加成反应和脱羧反应等制备二氢茉莉酮酸甲酯的化学合成方法和工艺。

Fig.6.Schematic of the formation of cyclopentanone from the polyester-polyol via primary scission of the ester bond, followed by hydrogen transfer with formation of cyclic chain ends which eliminate cyclopentanone and carbon dioxide

从表2中可以看出，低温、氮气条件下，PU-1分解主要可辨别的组分为1，4丁二醇，（Fig.5a）中m/z71不能够辨别，（Fig.5b）显示了m/z71离子谱图，这些峰一定是聚合物多元醇热降解产生的低聚物。

A synthesis of 2-pentylidene cyclopentanone starting from cyclopentanone and n-valeraldehyde through aldol condensation, followed by dehydration, was studied, and the yield reached 85.6%. 2-Pentenyl cyclopentanone was prepared in a yield of 95.0% from 2-pentylidene cyclopentanone with a hydrogenation methodology. Through Baeyer-villiger oxidation,δ-decalactone was synthesized in a yield of 63.9% from 2-pentenyl cyclopentanone with hydrogen peroxide.

研究了以正戊醛和环戊酮为起始原料，经羟醛缩合、脱水反应合成2-戊叉环戊酮，产率达到85.6%，2-戊叉环戊酮加氢制备2-戊基环戊酮，产率为95.0%，2-戊基环戊酮在双氧水作用下经Baeyer-villiger氧化重排反应合成δ-癸内酯，反应产率为63.9%，合成δ-癸内酯的总产率为52.0%，气相色谱分析纯度为98.7%。

It has been put forward that there exists single Ball point and double Ball points on the symmetrical connecting-rod curves of equilateral mechanisms.

从鲍尔点的形成原理出发，分析对称连杆曲线上鲍尔点的产生条件，提出等边机构的对称连杆曲线上有单鲍尔点和双鲍尔点。

The factory affiliated to the Group primarily manufactures multiple-purpose pincers, baking kits, knives, scissors, kitchenware, gardening tools and beauty care kits as well as other hardware tools, the annual production value of which reaches US$ 30 million dollars.

集团所属工厂主要生产多用钳、烤具、刀具、剪刀、厨具、花园工具、美容套等五金产品，年生产总值3000万美元，产品价廉物美、选料上乘、质量保证，深受国内外客户的青睐