烯醇

The method based on CE is simple and fast, and can be used to study the kinetics of keto-enol tautomerism of other compounds.

所建立的方法简单、快速，可以被用于其他羰基化合物的烯醇互变动力学研究。

15K. It is shown that two main factors, pressure and the polarity of the mixture, influence the EAA tautomerism.

结果表明，EAA的酮式-烯醇式异构化平衡常数随共溶剂极性的增加而减小。

Sugars (e.g., glucose) exhibit tautomerism between open forms and closed forms.

烯醇基则组成酚。

Capillary electrophoresis, enantioseparation, on-line preconcentration, keto-enol tautomerism

中文关键词：毛细管电泳，手性拆分，在线富集，烯醇互变动力学

DON causes feed refusal, emesis, immunosuppression or immunostimulation, teratogeny, cytotoxicity, reproductive toxicity and human cancers.

脱氧雪腐镰刀菌烯醇不仅可以导致动物产生急性毒性、生殖毒性、免疫毒性，而且与人的癌症相关。

Deoxynivalenol was a kind of mycotoxin and belongs to trichothecenes produced by Fusarium, leading to anorexia, emesis, immunosuppression or immunostimulation, teratogeny, cytotoxicity, reproductive toxicity and human cancers. DON was mainly a common contaminant of wheat, corn and relevant products.

脱氧雪腐镰刀菌烯醇(deoxynivalenol，DON)是由镰刀菌产生的有毒次级代谢产物，具有导致厌食、呕吐的急性毒性和免疫、细胞、生殖毒性以及致癌性，主要污染小麦、玉米等谷物及其制品。

Extensive experimentation revealed several issues, along with several corresponding solutions:(1) given that lithium metal dissolves slowly in liquid ammonia, considerable time was required to generate the dissolved metal solution (ca. 1 h);(2) the t -BuOH must be freshly distilled prior to use 21 to diminish the formation of ketone 19 (Figure 2);(3) efficient capture of the lithium enolate ( 11 ) required the use of freshly distilled TMSCl and Et 3 N; and (4) the presence of residual thiophenol upon workup was found to inhibit the subsequent Sc 3 -promoted hydroxymethylation.

大量实验揭示若干问题，随着几个对策 1鉴于锂金属溶化慢慢液氨、需要相当多的时间创造了金属溶液溶解(约占1小时)；(2) T恤使操作必须事先用新鲜蒸馏水形成酮减少2119(图2)；有效捕获的锂烯醇(11)使用新鲜蒸馏水需氯和ET三氮；含有残余硫workup经发现抑制随后推选3-羟甲晋升。

Receptor agonist ; SA4503{1?[2?（3; 4?dimethoxyphenyl）ethyl]?4?（3?phenylpropyl）piperazine}; DTG[3?di（2?tolyl）guanidine]; DHEAS ; PREGS ; learning ; memory

σ受体激动剂； 1-[2-（3； 4-二甲氧基苯基）乙基]-4-（3-苯丙基）哌嗪（SA4503）； 1； 3-二（2-甲苯基胍）；脱氢雄表酮硫酸酯；孕烯醇酮硫酸酯；学习记忆

Quinone methides, generated in situ from the reaction of 4-hydroxycoumarin with benzaldehyde, formaldehyde and pentanal, underwent the Diels-Alder reaction with silyl enol ethers to give a series of 3,4-dihydro-2H,5H-pyrano[3,2-c][1]benzopyran derivatives in high yields.

通过4-羟基香豆素与苯甲醛、甲醛和戊醛缩合产生的quinone methide与烯醇硅醚的Diels-Alder反应，以较高产率合成了一系列含有硅氧基的3，4-二氢-2H，5H-吡喃并[3，2-c][1]苯并吡喃-5-酮衍生物。

Its mechanism is the use of anthraquinone in alkali conditions off proton surface forming 10 more stable carbon anion face, but because carbon anion and oxygen ion exist between testosterone and enolate type each other changes, cause reaction product complex, at least five, reaction selectivity, product yield, separation difficulties, and product purity is not high, therefore, using the type and quantity of alkali, phase transfer catalyst type, solvent, to optimize the selection process conditions so as to improve the yield target product.

其机理是利用蒽酮在碱存在的条件下脱去氢质子面形成10位较稳定的碳负离子面进行，但是因为碳负离子和氧负离子之间存在酮式和烯醇式的互变，导致反应复杂，产物至少有五种，反应选择性差，产物分离困难，产率低，且产品纯度不高，因此，利用对碱的种类和量的多少，相转移催化剂的种类，反应溶剂的选择，来优化反应工艺条件从而提高目标产物的产率。

Lugalbanda was a god and shepherd king of Uruk where he was worshipped for over a thousand years.

Lugalbanda 是神和被崇拜了一千年多 Uruk古埃及喜克索王朝国王。

I am coming just now,' and went on perfuming himself with Hunut, then he came and sat.

我来只是现在，'歼灭战perfuming自己与胡努特，那麼，他来到和SAT 。