苄基

Benzyloxy benzoyldimethylsulfoxide was prepared by the reaction of ethyl 4-benzyloxybenzoate and dimethyl sulfoxide in the presence of sodium hydride, followed by Pummerer reaction with concentrated hydrochloric acid to afford eo-hydroxy-co-thio-methyl-(4/-benzyloxy) acetophenone, which reacted with urea, thiosemicarbazide, semicarbazide hydrochloride and o-phenylenediamine to give imidazolidine-2,4-dione, l,2,4-triazine-3- one and quinoxaline derivatives, respectively.

本文用4-苄氧基苯甲酸乙酯和二甲亚砜为原料，在氢化钠存在下反应，合成了(4′-苄氧基)-苯甲酰基-二甲亚砜。研究了该亚砜在浓盐酸的存在下发生的Pummerer重排反应，用重排产物ω-羟基-ω-甲硫基-(4′-苄氧基)-苯乙酮分别与尿素、氨基脲、氨基硫脲和邻苯二胺反应合成了2，4-咪唑啉-二酮、1，2，4-三嗪-3-酮、喹喔啉等含氮杂环化合物。

Formyl-3-acetyl-4-methyl-5-carbobenzoxypyrrole (6) was synthesized via the selective oxidation of 2,4-dimethyl-3-acetyl-5-carbobenzoxypyrrole (5), which was produced from acetylacetic benzylester (1) via nitrosation, reduction and addition-cyclization with acetylacetone. The total yield of the product was about 34%.

以乙酰乙酸苄酯(1)为原料，经过亚硝化、还原、与乙酰丙酮加成环化生成2， 4-二甲基－3-乙酰基－5-苄氧羰基吡咯(5)，通过选择性氧化反应制得目标化合物2-甲酰基－3-乙酰基－4-甲基－5-苄氧羰基吡咯(6)，反应的总收率约为34%。

UV spectra of the n -octanol gels formed by the three gelators indicate that the K bands of benzene rings are red shifted. It reveals that the π-π stack is one of the driving forces for the self-assembly of the gelators. The extent of red shifts of K bands depends on the amount of methyl groups in benzene rings which is in accord with the stabilities of the gels formed by such three gelators.

紫外吸收光谱表明，对比其溶液态，三种衍生物聚集体苯环的K带发生红移，表明π-π堆积作用是亚苄基山梨醇衍生物凝胶剂自组装的驱动力之一；红移的幅度随苯环上甲基数量的增加而增加，这与三种衍生物形成的分子凝胶的热稳定性相吻合。

Oxidation products of nitrogen compound can decompose peroxide.

甲基苄基硫醚具有很高的对氧活性，氧化生成砜。

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。

Excised garlic scapes treated with 3H-labelled 6-benzyladenlne were stored under 25℃ in the dark for respectively 8, 5, 10, 15, and 20 days before they were sampled.

离体蒜苔饲喂带3H标记的6—苄基腺嘌呤后在暗中25℃下放置，分别在第 3、5、10、15、20天取样，进行放射性物质的分布分析。

A key intermediate of 2-benzylphenol was synthesized from benzyl alcohol and phenol by Claisen rearrangement reaction in the presence of activated alumina and the analog of bifemelane with new structure was prepared by etherification,amination and acidification reaction of the intermediate.

以苯甲醇、苯酚为起始原料，在催化剂活性Al2O3存在下，通过克莱森重排反应得到关键中间体2-苄基苯酚，再经过醚化、胺化和酸化反应得到新型结构的二苯美仑类化合物。

This step is irreversible.(3) Phenyl isopropyl ether is very difficult to oxidize in dark, exhibiting different behavior from isopropyl ether and benzyl isopropyl ether.

3发现苯基异丙醚难以进行暗氧化，与异丙醚和苄基异丙醚醚表现出不同的暗氧化行为。

In this paper,plumules,cotyledons,hypocotyls,leaf blades,petioles and stalks of physic nut (Jatropha curcas L.) were used as explants,and callus induction and plant regeneration were studied on MS medium contained different concentrations of 6-BA and NAA.

以小桐子的胚芽、子叶、下胚轴、叶柄、叶片和茎段作为外植体，用不同浓度的6-苄基腺嘌呤(6-BA)和α-萘乙酸对其进行愈伤组织的诱导和植株再生的研究。

This can be prepared by purchasing "Zephiran" chloride 15% concentrate and diluting by mixing one (1) fluid ounce of concentrate and 127 fluid ounces of water to make a gallon of "Zephiran" solution 0.13%.

它可以这样准备：购买15%的氯化苄基。二甲基。烷基铵浓缩物，把1液量盎司的浓缩物和127液量盎司的水混合在一起，制成1加仑的0.13%的杀藻胺溶液。

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。