查询词典 bromo-cyanogen

The efficient synthesis of 2 (12 aminotridecyl)pyrrolidine (1), a new defensive alkaloid of Mexican bean beetle, Epilachna varivestis, has been achieved by employing the Wittig reaction as key step and 1 bromo 11 ethylenedioxyundecane as precursor of phosphonium bromide.

2- (12 -氨基十三烷基)吡咯烷(1)是从墨西哥大豆瓢虫 Epilachna varivestis中分离的新防卫生物碱。

A process for preparingp-fluo-2-(2-methyl-3-propionyl)-4-oxy-N,3-diphenyl-phenylbutylamide includes such steps as Friedle-Craft acylating of newly prepared phenylacetyl chloride and fluorobenzene under catalysis of AlCl3 to obtain 4-fluoro-phenylbenzyl ketone, brominating at carbonyl alpha position under catalysis of less AlCl3 to obtain alpha-bromo-4-fluo-phenylbenzyl ketone, and condensing with isobutyryl acetanilide under action of sodium ethoxide.

本发明涉及一种制备对氟－2－(2－甲基－3－氧丙基)－4－氧－N，3－二苯基－苯丁酰胺(1)的方法，其包括以下步骤：新制的苯乙酰氯与氟苯在AlCl3催化下进行Friedle－Craft酰化反应，得到对4－氟－苯基苄基酮(4)；化合物(4)在少量AlCl3催化下进行羰基α位溴化，得到α－溴－4－氟－苯基苄基酮(5)；然后(3)异丁酰乙酰苯胺在乙醇钠作用下与化合物(5)进行缩合。

Formylation and diformylation of dithieno [2,3-b:3',2'-d] thiophene were prepared by two methods. Firstly, aromatic carbanions were prepared by 1 Br/Li exchange of bromo dithieno[2,3-b:3',2'-d]thiophene with n-BuLi in THF at low temperature; 2 deprotonation of dithieno[2,3-b:3',2'-d]thiophene with LDA.

二噻吩并[2，3-b：3'，2'-d]噻吩单醛与双醛的制备首先通过两种方法产生芳基负离子：1溴代并三噻吩在四氢呋喃中与正丁基锂发生的溴锂交换；2用LDA对二噻吩并[2，3-b：3'，2'-d]噻吩去质子化作用。

Then ω-iodo hexadecanoic acid and ωbromo long-chained fatty acids with fourteen, fifteen and sixteen carbons were prepared from 1,ω-fifteen or sixteen carbon dibasic fatty acids in four steps of organic reactions respectively.

以天然酒石酸为原料，经过十二步有机反应，制备了两个手性甘油中间体（合成路线中含六个未见文献报道的化合物，但两个没有分离）。

The ionization enthalpies of acetic acid, chloro-, bromo- and iodo- acetic acids were measured at 5℃ intervals between 20℃ and 45℃ in aqueous solution by LKB-2277 Bioactivity Monitor.

本文用LKB-2277BioActivityMonitor以5℃的间隔测量了20-45℃温度区间乙酸、氯乙酸、溴乙酸和碘乙酸在水溶液中的电离焓。

Ab initio and density functional theory (B3LYP) in G98 were employed to study the following four direct aldol reactions between acetone and isobutyraldehyde or 3,3-dimethylbutyric aldehyde or benzaldehyde or 4-bromo-phenyl aldehyde catalyzed by-proline .

中文摘要：本文采用G98程序包中的从头计算方法和密度泛函方法计算研究了-脯氨酸催化丙酮与异丁醛、3，3-二甲基丁醛、苯甲醛及对溴苯甲醛的不对称直接羟醛缩合反应，共计四个反应体系。

In present paper, the progress of quinoline derivatives in synthesis and application are summarized first, then according to a lot of literature, designed the synthetic route for 8 derivatives of 6-AQ. They are 4-chloro-6-AQ, 5- chloro -6-AQ, 5-methoxyl-6-AQ, 7- chloro -6-AQ, 8- chloro -6-AQ, 8-bromo-6-AQ, 8-methyl-6-AQ and 8- methoxyl -6-AQ. All the products were obtained by reduction of its corresponding 6-nitroquinoline.

在对过往文献大量查阅的基础上，本文首先综述了喹啉及其衍生物的性质、合成方法及应用研究进展，并通过对文献报道方法的优化和改进成功地设计合成了4-氯-6-AQ、5-氯-6-AQ、5-甲氧基-6-AQ、7-氯-6-AQ、8-氯-6-AQ、8-溴-6-AQ、8-甲基-6-AQ和8-甲氧基-6-AQ等8种6-AQ的衍生物作为研究新型抗疟疾药物的中间体。

METHODS: 8-Bromo-cAMP and sodium nitroprusside were added into the media to raise the concentrations of cAMP and cGMP of cultured cardiomyocytes, in situ hybridization and immunohistochemistry methods were used to identify the mRNA and protein expression of bFGF. The amount of bFGF mRNA and protein expression were detected by computor imaging analysis system MIAS exe.

分离培养大鼠心肌细胞，加入8-溴-cAMP和硝普钠，升高细胞内cAMP、cGMP浓度，用原位杂交及免疫细胞化学的方法观察细胞内bFGF的表达，图象分析检测bFGF表达量的变化。

Bromo-geramine ; acid monoazo olyes ; spectrophoto metric method

新洁尔灭；酸性单偶氮染料；分光光度法

That 1,4-addition reactions of Grignard agent made from 1-bromo-3-triphenylmethoxyl-1-octene and organozinc agent made from 1-iodo-3-trimethysiloxy-1-octene with 2-(6-methoxylcarbonylhexyl)-4-(2- tetrahydro-pyranyloxy)-2-cyclopentenone both gave prostaglandin 〓 methyl ester statethat prostaglandin E compounds can be prepared by 1,4-addition reaction oforganozinc agent.

最后，研究了溴化-3-三苯甲氧基-1-辛烯基镁和碘化-3-三甲硅氧基-1-辛烯基锌与2-(6-甲氧羰己基)-4-(2-四氢吡喃氧基)-2-环戊烯酮通过1，4-加成反应合成〓甲酯的方法，结果表明，用有机锌试剂通过1，4-加成反应来合成PGE类化合物是可行的。

We have no common name for a mime of Sophron or Xenarchus and a Socratic Conversation; and we should still be without one even if the imitation in the two instances were in trimeters or elegiacs or some other kind of verse--though it is the way with people to tack on 'poet' to the name of a metre, and talk of elegiac-poets and epic-poets, thinking that they call them poets not by reason of the imitative nature of their work, but indiscriminately by reason of the metre they write in.

索夫农 、森那库斯和苏格拉底式的对话采用的模仿没有一个公共的名称；三音步诗、挽歌体或其他类型的诗的模仿也没有——人们把&诗人&这一名词和格律名称结合到一起，称之为挽歌体诗人或者史诗诗人，他们被称为诗人，似乎只是因为遵守格律写作，而非他们作品的模仿本质。

The relationship between communicative competence and grammar teaching should be that of the ends and the means.

交际能力和语法的关系应该是目标与途径的关系。