1) β-carbon elimination
β-碳消除反应
2) β-hydrogen elimination
β-氢消除反应
3) elimination
[英][i,limi'neiʃən] [美][ɪ,lɪmə'neʃən]
消除反应
1.
The impact of elimination conditions on yield was studied.
研究了消除反应条件对收率的影响。
2.
A preferential 1,2 elimination reaction of syn diethyl (2-acetylamino-1-bromo-2-(p-methoxy- phenyl)ethyl)phosphonate 1 rather than the anticipated nucleophilic substitution reaction under basic conditions is described in the present paper.
与文献 报道的甲基磺酸酯离去基团相比,在碳酸钾存在下,反应原料中的α- 溴原子作为相对较弱的离去基团导致很 低的转化率;而在1,8 -二氮杂双环[5,4,0] -十一碳 -7 -烯(DBU)存在下,由于α- 溴原子较强的电负性,其诱导 作用使得邻位β- 氢原子较易与碱作用,因而导致1,2消除反应。
3.
The propanedinitrile is synthesised from ethyl cyanoacetate by amination and elimination reaction.
由氰乙酸乙酯与氨反应生成氰乙酰胺 ,再经过消除反应制得丙二腈。
4) elimination reaction
消除反应
1.
To improve the synthetic procedure of vinylene carbonate,chlorination was carried out in CCl_4 at 55 ℃ and the elimination reaction was carried out in ethyl acetate under nitrogen atmosphere at 50 ℃.
对碳酸亚乙烯酯合成的现有工艺进行了改进:氯化反应在55℃,四氯化碳作溶剂下进行;消除反应则以乙酸乙酯作溶剂,50℃氮气保护下进行。
2.
Investigative results about effect of alkali on β-elimination reaction in variable transition-state theory were enunciate
阐述了可变过渡态理论中关于碱对消除反应影响的研究结果。
3.
91 kJ/molrespectively for elimination reactions of the MN and MN~+.
该文用ab initio和MNDO方法计算研究了硝酸甲酯(MN)及其自由基正离子(MN~+)的平衡几何构型、电子结构和氢转移消除反应。
5) β-elimination
β-消去反应
1.
The results indicated that de-esterification at low temperature(5℃) gave lessβ-elimination reaction,with better specific viscosity retained.
结果表明,低温下(5℃)碱法脱酯可将影响果胶品质的β-消去反应控制在较小程度,所得产品特性粘度能最大程度保持。
2.
The results indicated that higher concentration of ammonia (4N) at low temperature (5℃) gives lessβ-elimination reaction, with better specific viscosity retained and increases the conversion of methoxyl groups to acid amide groups.
结果表明,低温下(5℃)高浓度氨水(4N)脱酯可将影响果胶品质的β-消去反应控制在较小程度,所得产品特性粘度较高,酰胺化程度(DA值)较大;而低浓度氨水(1N)处理则得到酰胺化程度较低的产品。
6) β-elimination reaction
β-消去反应
1.
The component analysis of the eluate of gel chromatography and the β-elimination reaction results show that the protein in the enzymatic hydrolysate of rice protein is sugar-protein complex(glycoprotein) linked by N-glycoside peptide bond.
凝胶色谱洗脱组分分析和β-消去反应结果表明,酶水解所溶出的大米蛋白与糖分子仍以N-糖肽键形式连接。
2.
On the basis of the analysis of the mechanism of β-elimination reaction of haloalkyl,the influence regularity of the dissolvent polority for the reaction is discussed.
在分析了卤代烷β－消去反应的反应机理的基础上，讨论了溶剂的极性对反应的影响规律。
3.
The results showed that low temperature(4 ℃) not only could reduce the β-elimination reaction which will impact pectin quality but also keep the viscosity of the product at a h.
结果表明,低温下(4℃)碱法脱酯可将影响果胶品质的β-消去反应控制在较小程度,所得产品黏度能最大程度得到保持。
补充资料：epi-亚胺消除反应
分子式：
CAS号：
性质：在(1+2)环消除中脱掉亚氨基的反应。其中epi表示在消除过程中，三元环因单个氮原子离去而开环，实际上“epi”代替了“(1+2)seco"((1+2)开环)。反应一般在碘化亚铁或间氯过苯甲酸存在下发生。
CAS号：
性质：在(1+2)环消除中脱掉亚氨基的反应。其中epi表示在消除过程中，三元环因单个氮原子离去而开环，实际上“epi”代替了“(1+2)seco"((1+2)开环)。反应一般在碘化亚铁或间氯过苯甲酸存在下发生。
说明：补充资料仅用于学习参考，请勿用于其它任何用途。
参考词条