查询词典 ether

In the process of laboratory study, oxycodone was prepared by oxidating thebaine at 6,14-position under oxydol, hydrodeoxidizing 7,8-position double bond and 14-position ether under palladium catalyst. Furthermore, N-methyl of oxycodone was isolated byα-chloro-ethyl chloroformate under anhydrous condition and protection of 14-position hydroxyl to obtain noroxycodone, which was further converted into methylnaltrexone by N-alkylation in presence of cyclopropyl bromomethane, then by isolating 3-position methyl of methylnaltrexone under boron tribromide, becoming hydrochloride to prepare target compound, natrexone hydrochloride.

实验室工艺方面，本文首先用双氧水氧化蒂巴因的6-位和14-位、在钯炭催化下加氢还原7-8位双键和14-位醚合成羟考酮，然后提出并优化了在无水和14-位保护的情况下，用氯甲酸-α-氯乙酯脱去羟考酮的N-位甲基合成去甲羟考酮，再用环丙甲基溴将去甲羟考酮的N-位烷基化合成甲基纳曲酮，最后采用三溴化硼脱去甲基纳曲酮的3-位甲基和成盐酸盐合成盐酸纳曲酮。

Thermolysis of DM-DMI bis-carbamate was carried out in 3wt % solution of diphenyl ether at 254℃ for 5-6 hours, and the yield of DM-MDI is 61％ after purification.

而在第二步骤的热裂解反应中，在3wt ％二苯醚溶液中，控制反应温度在254℃，经反应5-6小时即得到DM-MDI，经浓缩及纯化后主产物之产率为61％。

Pleasingly, the residual thiophenol could be readily removed without silyl ether hydrolysis via passage of the product through a pad of basic alumina.

怡人、残硫可随时取消含硅基醚通过经水解产物透过垫基本氧化铝。

We must hang tog黑ether, or we'll be hanged separately.

我们必须团结在一起，否则我们将被一个个绞死。

We will build the roads and bridge s, the electric grids and digital lines that feed our commerce and bind us tog ether.

我们将恢复尊重科学的传统，利用高新技术的超常潜力提高医疗保健质量并降低成本。

They stuck tog ether through thick and thin.

不管有什么艰难险阻，他们都紧密团结在一起。

Tog ether in the cell nucleus w hich carries g enetic inform ation in the form of genes.

是由细胞核内，脱氧核糖核酸与联系著的各种蛋白质牢固扭卷在起的绳状结

May fortune smile on you in your new life tog ether !

祝你们新婚幸福！

An empty street, an enpty house, a hole in side my heart, i'm all alome, the rooms are getting smaller, i wonder how, i wonden why, i wonden where they are ,the days we hed, the songs we sang tog ether, oh yeah, and oh my love, im,holding on forever, reaching for a love that seems sofar, so i say a little prayer, and hope my dream s will take me there, where the skise are blue to see you once again my love,over seas and coast to coast, to find a placei

空荡的街景，空荡的房子，我的心破了一个洞。我不知道，我不知道原因何在？不知道他们在世界的哪个角落？那些共同度过的日子，一起唱的歌。我的爱。我永远在等待。得到一份爱看起来是如此的困难。所以我祷告。希望我的愿望将我带到一个有蓝天的地方。在那里我可以再次与你相遇。穿越海洋去找那样的地方。

Because of the unique properties of a transverse wave it became apparent that this hypothetical explanation required the ether to be a solid.

由于独特的性能横波显然这个假设性的解释规定，以乙醚要扎实。

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。