二苄基

A process for preparing alkylene glycols including reacting an alkylene oxide with water in the presence of a combination of additives and an anion exchange resin, wherein the combination of additives comprises carbon dioxide and an organic or inorganic base provided in an amount sufficient to maintain a pH of the reaction mixture between about 5.0 and 9.0, with the proviso that, when the base is bicarbonate or carbonate, then the anion exchange resin is a trimethyl benzyl ammonium anion exchange resin.

制备亚烷基二醇的方法，包括让烯化氧与水在添加剂组合和阴离子交换树脂存在下进行反应，其中添加剂组合包括二氧化碳和以足以保持反应混合物的pH值在约5.0和9.0之间的量提供的有机或无机碱，前提条件是当碱是碳酸氢盐或碳酸盐时，阴离子交换树脂是三甲基苄基铵阴离子交换树脂。

Further investigation in this area leads to discovery of a new synthesis of benzofuran.

本部分工作不仅发展出了一条合成苯并二氢呋喃的新方法，而且展示了苄基化反应在合成中的应用潜力。

The effects of the combination of three hormones, i.e. 1-naphthlcetic acid, 2,4-dichlorophenoxy acetic acid (2,4-D) and 6-benzylaminopurine (6-BA) on tissue culture progress in carnation (Dianthus carophyllus?? L.) were studied.

研究了1-萘乙酸、2，4-二氯苯氧乙酸(2，4-D)和6-苄基腺嘌呤(6-BA)等3种激素的质量浓度组合对康乃馨组织培养过程的影响。

With L-DOPA as the starting chiral phenylalanine derivatives, construction of the skeleton of Phthalascidin was studied. Firstly, starting from L-DOPA and 3,4-dimethoxyphenylalanine, an amide 〓 was obtained, and a modeling cyclization reaction was carried out but failed to give the anticipated product.

二、对由苯丙氨酸甲酯衍生物通过Bischler-Napieralski反应合成四氢异喹啉—3—甲酯进行了研究，通过研究首次发现，生成苄基噁唑的反应是正常的B-N反应的竞争性反应，并从机理上给予了解释，所得出的结论具有一定的规律性，在杂环的合成方面具有一定的应用价值。

The transparency and rigidity of a polyolefin resin is improved by addition of dibenzylidene sorbitol.

在加入二亚苄基山梨醇后，聚烯烃树脂的透明度和刚性有了很大的提高。

One synthetic strategy started fromγ-butyrolactone 38, from which a cyclohexadiene intermediate 30 was prepared in an overall yield of 44% in a 7-step procedure after y-butyrolactone underwent a-bromination, dehydrobromination, Diels-Alder reaction, aminolysis, benzylation, bromination and dehydrobromination, with the key step being the Diels-Alder reaction under harsh condition.

其中一个路线从γ-丁内酯38开始，连续经过α-溴化、脱溴化氢、Diels-Alder反应、胺解、苄基化、溴化和脱溴化氢共7步反应，制备了一个环己二烯衍生物30，总产率44％，关键步骤是高温高压下Diels-Alder反应。

DFT were carried out to optimize the conformational isomers with minimum energies. Peak separations in the methyl and azomethine signals were also found to originate from the rotation hindrance of the N-N bond. After N'-acylideneacetohydrazides were converted to 1, 3, 4-oxadiazole compounds, the proton signal of the methyl group appeared as a single peak.

端甲基质子和次甲基质子信号裂分也来源于N-N键旋转受阻。N'-苄基酰腙通过缩合反应转变成1，3，4-二唑化合物，消除了甲基空间取向的差异，其信号变为单峰。

In this paper a series of multiblock copolymers were synthesized by polycondensation of poly , phthalic anhydride and epoxy resin in the presence of triethyl benzyl ammonium chloride as the catalyst.

以三乙基苄基氯化铵为催化剂，将聚乙二醇、邻苯二甲酸酐和环氧树脂进行共缩聚，制得聚乙二醇-环氧树脂系列多嵌段共聚体。

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。

In this process, we have discovered a novel N-methylimidazole catalyzed two-component reaction. Dimethyl- and- succinates can be synthesized in moderate yields under mild conditions.

研究中，我们首先发现了一个新的N-甲基咪唑催化的DMAD与原位产生的单取代烯酮的二组分反应，在温和的条件下以中等收率合成了-型和-型的取代亚苄基琥珀酸二甲酯。

Now, however, all children continue in "comprehensive" schools, and the eleven-plus determines which courses of study the child will follow.

然而现在，所有的孩子都要在综合学校继续学习，所以这次考试只是决定他们将要学习哪些课程。

Cultivatable land , and led to a general recognition that development must not be carried at the cost of agriculture .

城区的迅速扩大在很多情况下侵占了宝贵的可耕地，使人们普遍认识到发展不能以牺牲农业为代价。