醚的

The yield of allyl glycidyl ether can reach up to 96% at 30 ℃ for 3 h at a molar ratio of 1 to 1.5 of sodium allylate to epichlorohydrin.

醚化反应中固体烯丙醇钠与环氧氯丙烷摩尔比为1：1.5，在无水条件下于30℃反应3 h，烯丙基缩水甘油醚的收率达96%以上。

The new synthetic technology of propandiol butyl ether and its comparison with the traditional production process are given in this article.

介绍了合成丙二醇丁醚的新工艺并和传统生产方法进行了比较，阐明了丙二醇丁醚作为溶剂和化学反应中间体的应用和发展前

SMM is the main precursor substance of DMS, and Cystine is one of the precursor substances of DMS in vegetables.

硫甲基蛋氨酸是蔬菜中甲硫醚主要的前体物质，胱氨酸是蔬菜中甲硫醚的前体物质之一。

Any Party included in Annex I may use 200x as its base year for nitrogen trifluoride, hydrofluoroethers and perfluoropolyethers for the purposes of the calculation referred to in paragraph x above.

附件一所列任一缔约方，为以上第x款所指计算的目的，可使用200x年作为其三氟化氮、氢氟醚和全氟聚醚的基准年。

The content ofα-asarone decreased after compathility of two medicines,it showed that the adding of RP inhibited dissolution ofα-asarone.

结果发现配伍后α-细辛醚含量降低，表明远志的加入抑制了α-细辛醚的溶出。

Based on the principle of ester hydrolyzation to ether in alkali condition, the process for preparation of dimethyl sulfide from sodium methyl sulfate residue was investigated.

根据酯在碱性条件下水解反应生成醚的原理，研究了以甲基硫酸钠废渣为原料制备二甲基硫醚的方法。

New reactions found in this program include: photoinduced regioselective free radical addition to aromatic imines;photoinduced Dielse-Alder reactions of aromatic imines for synthesis of tetrahydroquinoline derivatives;Photoinduced radical cation mediated selective ring opening reaction of epoxides;Formation of novel macrocyclic crown ethers by photoinduced reaction of diazonaphthaquinones;photoinduced selective desilylation of silyl ethers.

用这种方法成功的发现了下列在有机合成中有意义的新反应：(1)光诱导产生的自由基正离子诱导的自由基对芳香亚胺的区域选择性加成反应；(2)用光诱导的芳香亚胺的Diels-Alder反应合成四氢喹啉衍生物；(3)经光诱导产生的自由基正离子基诱导的环氧化物选择性开环反应；（4）重氮萘酮在环醚中经光诱导反应形成新奇的大环冠醚；（5）硅醚的光诱导选择性脱硅基反应。

Sevoflurane was synthesized from 1,1,13,3,3-hexafluoro-2--propane by halogen-exchange in the presence of an ionic liquid as the solvent and a fluorinating agent .

在离子液体作为反应介质的条件下，以六氟异丙基氯甲基醚的氟代反应合成了七氟醚。

Benzyl ether is easy to condensed from benzyl chloride in the presence of alkali. In order to prevent production of benzyl ether, benzyl chloride must not contact with alkali.

由于氯化苄在碱作用下容易生成二苄醚，为了减少二苄醚的生成，必须避免氯化苄与碱的直接接触。

We found that the iodohydroxylation of 1-2-allenyl selenides with I〓 and water can smoothly proceed in aqueous MeCN at 0℃.

我们发现在乙腈水溶液中，1，2-联烯基硒醚可以和碘发生羟碘化作用，碘和羟基高度区域和立体选择性加成到1，2-联烯基硒醚的β，γ-位。

According to the clear water experiment, aeration performance of the new equipment is good with high total oxygen transfer coefficient and oxygen utilization ratio.

曝气设备的动力效率在叶轮转速为120rpm～150rpm时取得最大值，此时氧利用率和充氧能力也具有较高值。

The environmental stability of that world - including its crushing pressures and icy darkness - means that some of its most famous inhabitants have survived for eons as evolutionary throwbacks, their bodies undergoing little change.

稳定的海底环境─包括能把人压扁的压力和冰冷的黑暗─意谓海底某些最知名的栖居生物已以演化返祖的样态活了万世，形体几无变化。