保护基

In order to resolve these questions, we try to find some new protecting group which could be used in the preparation of such unstable nucleotides analogues.

对于一些寡核苷酸的类似物，由于它们在某些化学环境下的不稳定性而使它们的合成具有一定的困难，为了解决这些问题，人们一直在开发新的保护基，以消除这些副反应的影响，更方便地制备这些化合物。

And get the target compounds by sealed tube reaction, diazotization, Sonogashira reaction.

并通过封管反应、重氮化、亲电取代、Sonogashira偶联反应以及保护基的脱去等反应合成了目标化合物。

A crude lipase, Newlase F, was used to remove C-terminal protecting groups from dipeptide esters.

讨论了工业用混合酶Newlase F在脱多肽C端保护基中的应用。

In the reaction, by using Michael addition with alkali as protective, utilizing a-alanines N of chiral carbon to introduce N+ lof chiral carbon of the new compound, and making use of the different solubility of resultant in the solvent, disparting form dominical compound.

并利用新生成的手性化合物在反应溶剂中的溶解度差别，分出了以构型为主的产物，克服了脱保护基和拆分条件复杂繁琐问题。

If not, God would have still protected Gideon in some other way.

假如没有，神仍然会用其他的方式保护基甸。

Thus a better method of preparing free 2-OH glycoside with less reaction steps was obtained.

对于2，3-二-O-乙酰保护基的糖苷，2-O-去乙酰化的效果更好。

To our disappointed, the new heterocycle was destroyed while removing the protective Ts group.

但是很遗憾，选择许多试剂来脱除保护基Ts都没有成功。

Study on the Approach and the Medchine for the Deprotection of Silyl Ether by Sodium Periodate

过碘酸钠去硅醚保护基方法及机理的研究

The major goal for our research is to use simple synthesized method for various fluorescence dye derivatives containing Phenothiazine core via Heck reaction and Suzuki coupling reaction that unprotected at 10N-H.

中文摘要本实验的研究目的为利用简单的合成步骤：在Phenothiazine 的3，7-位置上，藉由Heck reaction和Suzuki coupling reaction直接合成出 10NH没有保护基的萤光染料。

Our synthesis is characteristic of ready availability of starting material (piperonal, ethyl oxalate, allyl bromide, ethyl 4-bromobutyrate), operationally simple reactions with cheap reagent chemicals, and atom economy.

在合成过程中，我们没有使用任何保护基，也没有将反应活性中心氮原子钝化；相反地，利用这一富电子活性中心的许多反应来构筑我们的三尖杉碱环系。

In the United States, chronic alcoholism and hepatitis C are the most common ones.

在美国，慢性酒精中毒，肝炎是最常见的。

If you have any questions, you can contact me anytime.

如果有任何问题，你可以随时联系我。