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The effects of cholic acid concentration and pH of the buffer on separation were studied, and the influences of organic additives such as methanol, acetonitrile, isopropyl alcohol were also examined.

该实验表明电化学检测同样可用于手性物质的分离,从而扩宽了电化学检测的应用范围,并为对体的定量合成和纯度测定找到了灵敏的检测方法。

She put the faded blue hood on over her long, heavy braid of glossy, jet-black hair, and smiled chummily at her reflection in the little greenish glass.

她把那顶褪色的兜帽戴在她光泽的黑发梳成的长长的大辫子上,对着她在绿色镜子里的像友好地一笑。

Thirteen children between the ages of two and twelve ran throughout her halls, energized by the crispness in the air and the spirit of the season.

当我们玩过家家的时候,我们会坐在东区起居室的大帷幕后面,阳光照射进来,亮了它黄色的墙壁。

Prescribed period俞安poem goes:"wearing stone-Hui Ying-yen, it's clear round on, the shadows hanging crossfall, but also as Guizhi long."

明俞安期诗云:&穿石圆辉,明明月轮上,树影挂横斜,还如桂枝长。&

In addition to cyclopropanation, the typical Diels-Alder reaction between cyclopentadiene and N-acryloyl-l,3-oxazolidinine-2-one with Ll-L8/metal complexes have also been studied.

对于新配体在Diels-Alder反应中的对选择性的研究,我们采用环戊二烯与3-丙烯酰基-2-噁唑啉酮的反应。

We have initially examined organocatalytic enantioselective synthesis ofα-Hydroxy phosphonates through the reaction of dialkyl phosphates and aldehydes.

我们初步实验了对选择性的有机催化二烷基亚磷酸酯和醛的反应不对称合成α-羟基膦酸酯。

In the second part of this thesis, a formal [2+2] cycloaddition ketenes and dialkyl azodicarboxylates was studied. We found that by adjusting the substituents in the diazenes, the reaction mode can be completely switched, and furnish four-membered-ring products, aza-b-lactams, the enantioselectivity was up to 91%.

经研究发现,通过对偶氮化合物取代基团的改变,我们可以实现[4+2]环加成反应到[2+2]环加成反应的转变,在手性氮杂环卡宾的作用下,对具有各种取代基的烯酮都可以很好的产率得到氮杂b-内酰胺,其对选择性最高可以达到91%。

Omeprazole racemate was resolved respectively by simulated moving bed chromatography and batch chromatography with the coated cellulose triphenylcarbamate as chiral stationary phase and ethanol containing 0.1% diethylamine as mobile phase.

用纤维素三苯基氨基甲酸酯涂敷型手性固定相和含0.1%二乙胺的乙醇溶液,研究了模拟移动床色谱和间歇色谱对奥美拉唑对体的拆分。

Treatment of dials with N-tert-butanesulfinamide, all biaryl dials were successfully converted into the corresponding bis-imines which were then treated with samarium diiodide to afford diamine products. The absolute configurations of all the intramolecular coupling products were determined by X-ray crystallography.

轴手性二醛与N-叔丁基亚磺酰胺缩合得到相应的亚胺,其为一对非对异构体。N-叔丁基亚磺酰亚胺在二碘化钐条件下得到的偶联产物,经X-衍射也确定了其立体构型。

Studing on samarium diiodide promoted asymmetric intramolecular reducing coupling reactions, we have made the resolution of the racemic biaryl dials by using enantiomeric N-tert-butanesulfinamine as the resolving reagent successfully and thus obtained a series of axially chiral biaryl dials with high enantiomeric excess.

中文摘要在二碘化钐促进的分子内不对称还原偶联反应中,我们不仅对联芳基二醛底物的合成路线进行了优化,还发现N-叔丁基亚磺酰胺辅基可以作为手性试剂,成功地对联芳基骨架二醛化合物进行拆分,得到高对体过量的轴手性二醛类化合物。

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But we don't care about Battlegrounds.

但我们并不在乎沙场中的显露。

Ah! don't mention it, the butcher's shop is a horror.

啊!不用提了。提到肉,真是糟透了。

Tristan, I have nowhere to send this letter and no reason to believe you wish to receive it.

Tristan ,我不知道把这信寄到哪里,也不知道你是否想收到它。