溴

We expounded the N-alkylation, tricholroacetylation and bromination of pyrrole in chapter two.

第二章，论述了吡咯的N-烷基化、三氯乙酰化及溴代反应。

The synthesized model compounds with the catalytic function of bromination and sulfoxidation are

本文介绍已合成并具有溴化或硫醚氧化催化功能的V2HPOs的模型配合物。

Starting from p-hydroxybenzaldehyde, isovanillin (3-hydroxy-4-methoxybenzaldehyde) was synthesized by three-step reactions of bromination,methylation and hydrolysis.

以对羟基苯甲醛为原料，经溴代、甲基化和水解3步反应合成了异香兰素，改进并优化了合成路线。

In conclusion, the experimental method was easily performed, the reaction time was short and the products were gained in high yield. The bromination was controlled by the large molecular structure of ammonium methylbdate.

研究结果表明，实验方法操作简单易行，反应时间段短，产物专一性好，后处理简单，并且收率较高，活化溴原子对苯环的进攻位置主要受到催化剂钼酸大分子结构的控制。

Pigments ; quantum mechanics ; calculation ; molecular orbital theory ; CLT acid ; bromination ; technological process

颜料；量子力学；计算；分子轨道理论； CLT酸；溴化反应；工艺步骤

The main work we did on synthesis: We studied bromination reaction influence factor in detail, such as reaction time、reaction temperature、solvent dosage、reagent mole ratio, and optimized the reaction condition, discussed reaction mechanism rudimentally.

本文在合成方面所做的工作：系统研究了对称二醇的单溴代反应反应时间、反应温度、溶剂用量、反应物摩尔比等因素对产率的影响。

In addition,α-alkenoyl ketene--acetals mainly used as the synthons of 3C and 5C, theα-functionalized reactions of which just limited on some simple reactions, as bromination, nitration, acetylation. However, the understanding of the forming of C-C bond atα-position is far from enough.

另外，对于α-烯酰基二硫缩烯酮的研究则主要集中在其作为3C或5C合成子的研究上，其α-位的官能化研究只是停留在溴化、硝化、脱羧等简单的反应之上，而对α-位C-C键的形成还缺乏足够的认识。

We have designed and synthesized a novel linear conjugated polymer. PQV was obtained via sequentially nitration, reduction, cyclization, bromination and condensation from p-xylene. And the experimental condition was optimized.

本文设计合成了一种新的线型共轭聚合物，以对二甲苯等为原料，通过硝化、还原、关环、溴化、缩聚等反应合成了PQV，并对各单元过程的合成条件进行了优化。

The present invention belongs to the field of photosensitive material technology, inparticular, relates to a hollow silver bromiodide flake microcrystalline emulsion and its preparation method.

本发明属于感光材料技术领域，特别是涉及中空溴碘化银薄片微晶乳剂及其制备方法。

In the bromization reaction of LA,the reaction conditions such as reaction temperature,drop time of Br_2 and reaction medium were optimized.

以来源于生物质资源的乙酰丙酸为原料，通过改进的溴化和水解反应合成了5-HLA。

By the time of its fall, most of the prisoners were writers who had written against the corruptions of the government.

到它被攻陷的时候，里面多数的犯人是写了反对政府贪污文章的作家。

The most obvious variation to ovum morphological character was that the color was changed from light green to sepiaceous in embryonic development, and all the ovums were almost hatched after 96h.

在胚胎发育过程中卵的形态特征最明显的变化是颜色从淡绿到深褐色，卵在发育96h后卵基本全部孵化。