成环,redistribution reaction,在线英语词典,英文翻译,专业英语

1) redistribution reaction

成环

2) cyclization reaction

成环反应

Then 4-oxy-7-methyl-1,8-naphththyridine-3-carboxylic acetate was synthesized by cyclization reaction in different heat carr.

在250℃的反应温度下,分别以二苯醚、石蜡油和邻苯二甲酸二乙酯为热载体进行成环反应,得到4-氧-7-甲基-1,8-萘啶-3-羧酸乙酯的收率分别为88。

3) addition-cyclization

加成环化

2-Formyl-3-acetyl-4-methyl-5-carbobenzoxypyrrole(6) was synthesized via the selective oxidation of 2,4-dimethyl-3-acetyl-5-carbobenzoxypyrrole(5),which was produced from acetylacetic benzylester(1) via nitrosation,reduction and addition-cyclization with acetylacetone.

以乙酰乙酸苄酯(1)为原料,经过亚硝化、还原、与乙酰丙酮加成环化生成2,4-二甲基-3-乙酰基-5-苄氧羰基吡咯(5),通过选择性氧化反应制得目标化合物2-甲酰基-3-乙酰基-4-甲基-5-苄氧羰基吡咯(6),反应的总收率约为34%。

4) component links

构成环节

The paper analyses the basic issues concerning performance evaluation of national geological work through a theoretical framework involving general concept and classification,main component links and flow,and key points and difficulties.

文章从“国家地质工作的一般概念和分类”、“国家地质工作绩效评价的主要构成环节和流程”和“国家地质工作绩效评价的重点和难点”等三个方面分析了国家地质工作绩效评价的基本问题,并提出了相关建议。

5) composition loop

组成环

The composition loop dimension and tolerance is calculated and adjusted in order to guarantee products to have qualified dimension.

通过组成环尺寸及公差计算,调整组成环的尺寸公差,以保证产品尺寸合格。

6) in-situ cyclization

原位成环

The important reaction mechanism of in-situ cyclization taking place in the course of the expandable copolymer foaming and heat treament was discussed,and then was validated via optical microscope,infrared adsorption spectrum(FTIR) and differential thermal analysis(DSC).

提出MAA/AN/AM三元共聚物在发泡和热处理过程中所发生的“原位成环”反应机理,并通过差示扫描量热(DSC)、热失重(TG/DTG)和红外光谱(FTIR)分析进行验证。

The mechanism of in-situ cyclization during the foaming and heat treatment was studied using differential scanning calorimeter (DSC) and Fourier transform infrared spectrometer (FTIR).

探讨了相应共聚物在发泡和热处理过程中发生的“原位成环”反应及机理,并利用差示扫描量热分析(DSC)和红外光谱(FTIR)进行了验证。

Methacylic acid / acrylonitrile copolymer (MAA/AN) foam with low density,high strength,high rigidity and high heat-resistance is prepared via the means of in-situ cyclization.

通过“原位成环”法制备了一种低密度、高强度、高刚性和高耐热性的(甲基丙烯酸/丙烯腈)共聚物(MAA/AN)泡沫塑料。

参考词条

成环缩合建成环境生成环境合成环境成环境构成环境三聚成环颊黏膜细胞（网格布点）

补充资料：不对称成环反应

分子式：
CAS号：

性质：生成不对称环状化合物的反应。例如不对称环丙烷化。

说明：补充资料仅用于学习参考，请勿用于其它任何用途。

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1) redistribution reaction 成环 2) cyclization reaction 成环反应 1. Then 4-oxy-7-methyl-1,8-naphththyridine-3-carboxylic acetate was synthesized by cyclization reaction in different heat carr. 在250℃的反应温度下,分别以二苯醚、石蜡油和邻苯二甲酸二乙酯为热载体进行成环反应,得到4-氧-7-甲基-1,8-萘啶-3-羧酸乙酯的收率分别为88。 3) addition-cyclization 加成环化 1. 2-Formyl-3-acetyl-4-methyl-5-carbobenzoxypyrrole(6) was synthesized via the selective oxidation of 2,4-dimethyl-3-acetyl-5-carbobenzoxypyrrole(5),which was produced from acetylacetic benzylester(1) via nitrosation,reduction and addition-cyclization with acetylacetone. 以乙酰乙酸苄酯(1)为原料,经过亚硝化、还原、与乙酰丙酮加成环化生成2,4-二甲基-3-乙酰基-5-苄氧羰基吡咯(5),通过选择性氧化反应制得目标化合物2-甲酰基-3-乙酰基-4-甲基-5-苄氧羰基吡咯(6),反应的总收率约为34%。 4) component links 构成环节 1. The paper analyses the basic issues concerning performance evaluation of national geological work through a theoretical framework involving general concept and classification,main component links and flow,and key points and difficulties. 文章从“国家地质工作的一般概念和分类”、“国家地质工作绩效评价的主要构成环节和流程”和“国家地质工作绩效评价的重点和难点”等三个方面分析了国家地质工作绩效评价的基本问题,并提出了相关建议。 5) composition loop 组成环 1. The composition loop dimension and tolerance is calculated and adjusted in order to guarantee products to have qualified dimension. 通过组成环尺寸及公差计算,调整组成环的尺寸公差,以保证产品尺寸合格。 6) in-situ cyclization 原位成环 1. The important reaction mechanism of in-situ cyclization taking place in the course of the expandable copolymer foaming and heat treament was discussed,and then was validated via optical microscope,infrared adsorption spectrum(FTIR) and differential thermal analysis(DSC). 提出MAA/AN/AM三元共聚物在发泡和热处理过程中所发生的“原位成环”反应机理,并通过差示扫描量热(DSC)、热失重(TG/DTG)和红外光谱(FTIR)分析进行验证。 2. The mechanism of in-situ cyclization during the foaming and heat treatment was studied using differential scanning calorimeter (DSC) and Fourier transform infrared spectrometer (FTIR). 探讨了相应共聚物在发泡和热处理过程中发生的“原位成环”反应及机理,并利用差示扫描量热分析(DSC)和红外光谱(FTIR)进行了验证。 3. Methacylic acid / acrylonitrile copolymer (MAA/AN) foam with low density,high strength,high rigidity and high heat-resistance is prepared via the means of in-situ cyclization. 通过“原位成环”法制备了一种低密度、高强度、高刚性和高耐热性的(甲基丙烯酸/丙烯腈)共聚物(MAA/AN)泡沫塑料。参考词条成环缩合建成环境生成环境合成环境成环境构成环境三聚成环颊黏膜细胞（网格布点）补充资料：不对称成环反应分子式： CAS号：性质：生成不对称环状化合物的反应。例如不对称环丙烷化。说明：补充资料仅用于学习参考，请勿用于其它任何用途。
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