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In comparison with acetyl acetate method we found that in the reaction process the concentration of enol-like compound had some effect on the reaction rate.

通过与乙酰丙酮法的比较,认为在反应过程中,成环物质的烯醇型的化合物含量对反应速度有影响,烯醇型的化合物含量越高,反应温度越低。

The production methods of glutaraldehyde,including those of addition reaction of acraldehyde , oxidation of 1,5-pentadiol,reduction of glutaryl chloride and oxidation of cyclopentene,are summarized.

综述了丙烯醛加成、 1,5 -戊二醇氧化、戊二酰氯还原和环戊烯氧化等戊二醛的合成路线和制备方法,考察了目前戊二醛的生产厂家及其在皮革鞣剂、油田注水杀菌剂和医药杀菌等领域的应用市

At present,the main methods to produce epichlorohydrin chlorination are through allyl chloride route at high temperature or allyl alcohol route.

目前,世界上环氧氯丙烷工业的生产方法有两种:氯丙烯高温氯化法和烯丙醇法。

Allyl glycidyl ether was synthesized from allyl alcohol and epichlorohydrin by phase transfer catalysis.

以烯丙醇和环氧氯丙烷为原料,采用相转移催化法,合成了烯丙基缩水甘油醚。

At first,the intermediate of sodium 3-chloro-2-hydroxy propanesulfate was synthesized from epichlorohydrin and sodium bisulfite;And then,using NaOH as a catalyst,the title compound has been synthesized from intermediate and allyl alcohol to reach the yield of about 70%.

先由环氧氯丙烷和亚硫酸氢钠合成中间体3-氯-2-羟基丙磺酸钠,然后中间体再与丙烯醇在氢氧化钠催化下生成目标产物2-羟基-3-烯丙氧基丙磺酸钠。

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。

Excited triplet state of [60]fullerene containing piperidinoxanthate dyad is at 690nm, which has lifetime of 23.7xs in Ar-saturated benzonitrile, whereas that ofparent C60 is at 750nm, with lifetime of 50s, indicating that excited triplet state of

富勒烯C_(60)哌啶黄原酸酯稠合体激发三线态的最大吸收峰在690nm,相对于纯C_(60)发生蓝移用532nm激光激发后,富勒烯C_(60)哌啶黄原酸酯稠合体激发三线态的最大吸收峰在690nm,相对于C_(60)的750nm发生蓝移,在氩气饱和的苯腈中寿命23.7μs,比C_(60)的55μs短,表明环加成反应连接的哌啶黄原酸酯部分具有吸电子性质。

The reaction of cyclic b-keto esters with CF3CO2ZnCH2I provides the corresponding ring-expanded products with the advantage of mild condition in moderate to good yields. A simple and efficient procedure has been developed for a variety of 1,3-diketones converted into the corresponding 1,4-diketones and trans-1,2-disubstituted cyclopropanols in high yields. In conclusion, this new type of organozinc reagents has been developed for many useful reaction in organic synthesis.

利用有机锌试剂所具有的双重特性,在新型的Baylis-Hillman反应中,可以直接与炔基酮和醛反应一锅制得多官能团的三取代的顺式烯;在b-酮酯化合物的扩环反应中,取得了重要进展,得到了增加一个碳的扩环产物,&一步法&合成,反应条件温和、环境友好;在1,3-二酮分子中成功地插入1个碳,合成出1,4-二酮和环丙醇,为现代有机合成提供了新的合成方法,具有良好的应用前景。

Yet, completely differ from the cases of 〓-H, the 〓-dihydroxyl group was introduced after subsequent epoxidation and oxane ring opening of the 〓 tricyclic olefin.

在〓-β-H三环烯31基础上的环氧化和环氧开环反应引入的两个羟基,为双直立的〓,不同于〓类。

In addition, we found that 4-phenyl-l,2,4-triazolinium N-ylides reacted withvarious electron-deficient olefins to afford pyrrole derivatives in good yields via 1,3-dipolar cycloaddition oxidative ring fission, In some cases, tetrahydropyrrolo[1,2-b]triazole and pyrrolo[1,2-b]triazole, which are stable and are not aromatized orcleaved in the reaction conditions, could be isolated, This is a facile and novel route forthe synthesis of pyrrole derivatives.

此外,本文研究了五员三氮杂环化合物4-苯基1,2,4-三氮唑的N-叶立德,发现在氧化剂存在下与缺电子烯烃发生1,3-偶极环加成反应生成的吡咯并[1,2-b]三氮唑,在大多数情况下开环生成吡咯衍生物,反应条件温和,收率良好,是合成吡咯衍生物的一个新的途径。

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However, as the name(read-only memory)implies, CD disks cannot be written onorchanged in any way.

然而,正如其名字所指出的那样,CD盘不能写,也不能用任何方式改变其内容。

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