溴化的

The originalprocedure has subsequently been replaced by milder and more environmentallyfriendly conditions. We tried to alkylate 3,4,5-trimethoxytoluene by2-allylphenylbenzyl ether in the presence of N-bromosuccinimide.

本实验是在溴代琥珀酰亚胺的作用下使2-烯丙基苯基苄基醚产生苄正离子，苄正离子亲电进攻3，4，5-三甲氧基甲苯从而进行傅氏烷基化反应的。

The effects of different PTC,reacting time,temperature,the concentration of potassium hydroxide and the bromoethane amout on the reaction were studied.

考察了不同相转移催化剂、反应时间、反应温度、氢氧化钾浓度、溴乙烷用量诸因素对2－甲基吲哚进行N－烷基化反应的影响。

In this thesis, three different chain length hybrid monomers, containing acrylate and propenyl ether group, was synthesized by three-step reaction through 1.3-propanediol, 1.4-butanediol, 1.6-hexanediol, allyl bromide and acryloyl chloride.

本文以1.3-丙二醇、1.4-丁二醇、1.6-己二醇、烯丙基溴及丙烯酰氯为主要原料，通过三步反应合成了三种不同链长的丙烯酸酯-丙烯基醚杂化单体。

More prophase and prometaphase cells may be obtained by this technique.

在培养基中加入5-溴脱氧尿嘧啶核苷使细胞同步化6—8小时，可以得到较多的前期和前中期分裂细胞。

Phosphine generally require long exposure periods, whereas methyl bromide and sulfuryl fluoride provide a rapid fumigation that can be completed in less than 4 days, often within 24 hours.

磷化氢一般需要较长的密闭时间，而溴甲烷和硫酰氟则适合快速熏蒸，可在不到4天之内完成熏蒸工作，一般在24小时内完成。

The allylation reactions of aldehydes with allyl bromide were carried out in 76%～93% yields with Nd-SnCl2-H2O under ultrasound irradiation at room temperature for 50～60 min.

在Nd-SnCl2-H2O体系中，用烯丙基溴超声诱发下进行了一系列芳香醛的烯丙基反应，室温反应50～60min得76%～93%烯丙基化产物；而不用超声波时同样体系中搅拌3～4h高烯丙基醇产率为30%～86%。

The target compound 1 was successfully prepared via esterification, reduction, bromization and cyanation processes by using L--malic acid (2), which is an inexpensive and easily available starting material. The overall yield was 56.7%.

以廉价、易得的L--苹果酸为起始原料，经酯化、还原、溴代和氰化四步反应得到目标化合物-4-氰基-3-羟基丁酸乙酯，合成总收率为56.7%。

In the hydrocarbylation reaction,bromoethane was used instead of the expensive iodoethane with the yield 90% and the cost was reduced.

在烃化反应中，以溴乙烷代替价格昂贵的碘乙烷，收率达90％，降低了生产成本。

We have the most advanced test equipment such as Bromid mass spectrum testing instrument ,Ca6+ Lumionosity testing instrument and ICP heavy metal testing instrument.

为了一个环保的地球家园，公司不惜世资引入溴合化物质谱测试仪、六价镉光度测试仪、ICP重金属检测仪等测试设备。

QN 〓PHAL,〓PHAL and 〓PHAL were quaternized by refluxing with benzyl bromide to give ligands 8, 9 and 10 respectively. 2. The chiral ligands were applied to the AD reaction of olefins with NMO as co-oxidant and PEG (400 MW) or PF〓 as reaction media.

以奎宁和奎尼定为原料分别与1，4-二氯-2，3-二氮杂萘反应制备〓PHAL和〓PHAL，然后通过〓PHAL、〓PHAL及〓PHAL与苄基溴的季铵化反应制备单季铵盐手性配体8、9和10。

For a big chunk of credit-card losses; the number of filings (and thus charge-off rates) would be rising again, whether

年美国个人破产法的一个改动使得破产登记急速下降，而后引起了信用卡大规模的亏损。

Eph. 4:23 And that you be renewed in the spirit of your mind

弗四23 而在你们心思的灵里得以更新