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1)  elimination [英][i,limi'neiʃən]  [美][ɪ,lɪmə'neʃən]
消去反应
1.
The procedures are described involving a selective Hofmanntype elimination of the 2cyanoethyl groups from the bisimidazolium salts 3 obtained by the reaction of α,ωdihalides 2 with 1Himidazole1propanenitrile 1.
1(2氰乙基)咪唑1与α,ω二卤化合物2反应生成双咪唑钅翁盐3,3在碱的作用下发生选择性Hofmann型消去反应以90。
2.
Using the –~CHR-(CH_2)_3-NFCH_3 (R = H, CH_3, CH_2CF_3, CHO, COCH_3) as the computational model, the two possible intramolecular reactions, nucleophilic substitution on nitrogen and elimination reaction, are studied at the theoretical level of MP2(full)/6-31+G(d,p).
我们在MP2(full)/6-31+G(d,p) 理论水平上,以–~CHR-(CH_2)_3-NFCH_3(R = H, CH_3, CH_2CF_3, CHO, COCH_3)为计算模型,对分子内可能发生的两条反应路径—氮原子上的亲核取代反应及消去反应进行了理论研究。
2)  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。
3)  heating elimination
热消去反应
1.
The heating elimination reaction in organic synthesis;
有机合成中的热消去反应
4)  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。
5)  Hoffmann-type elimination
Hoffmann型消去反应
1.
Three series of target compounds, 1-(ω-haloalkyl) imidazoles 3a-3e, bis-imidazoles 5a-5b and tri-imidazoles 6a-6b have been synthesized by the selective quaterisation of 1H-imidazole-1-propanenitrile (1) with α, ω-dihalide, bis(bromomethyl) benzene or tri(bromomethyl) benzene to obtain imidazolium salts, following by Hoffmann-type elimination.
1-( 2 -氰乙基 )咪唑与 α,ω-二卤代烃、二溴苄及三溴苄选择性地发生季铵化反应 ,继而在碱作用下发生 Hoffmann型消去反应 ,简便而高效地制备了 3个系列咪唑衍生物 :1 -( ω-卤烷基 )咪唑 3a~ 3e、含中心功能基的双咪唑 5 a~ 5 b和三咪唑 6 a~ 6 b,并类似地制得相应的苯并咪唑衍生物 7和 8。
6)  β hydrogen elimi nation
β-H消去反应
补充资料:消去反应
分子式:
CAS号:

性质:又称消去反应。在适当条件下,有机化合物中相近两个碳原子上脱去水、卤化氢等小分子的反应。如乙醇脱水、卤代乙烷脱卤化氢为乙烯等反应。消除反应也可以发生在两个分子之间,如2个分子乙醇转化为二乙醚(CH3CH2)2O。

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