丙烯基

They were principally used to catalyze aldol, allylation, Diels-Alder, ene and Friedel-Crafts reactions.

它们主要被用来催化Aldol，烯丙基化，Diels-Alder，Ene和Friedel-Crafts等反应。

The preparation of potassium malonyloxyborohydride in situ and its seletive hydroborating alkene are described.

介绍了丙二酰氧基硼氢化钾的制备及其原位与烯烃的选择性硼氢化。

These ligands were found to be very effective in construction of quaternary carbon centers by using asymmetric allylic alkylation.

这类配体在前手性亲核试剂的不对称烯丙基化构筑手性季碳中心的反应中，显示了较好的反应活性及对映选择性。

The ligands were found to be effective in palladium-catalyzed asymmetric allylic alkylation to construct chiral quaternary carbon center.

这类配体在前手性亲核试剂的不对称烯丙基化构筑手性季碳中心的反应中，显示了较好的反应活性及对映选择性。

It was found that the stereoselectivity of this reaction to produce S-CHBE could be remarkably improved by pretreatment with heating and allyl alcohol.

而烯丙基溴预处理可以使反应立体选择性从通常的生成S-型产物过量转变为R-型产物过量，优化处理条件后能使R-CHBE的e.e。

The main components were myristic acid (19.37%), palmitic acid methyl ester(7.56%), lascorbic acid 2,6dihexadecanoate(6.27%), 8,11octadecadienoicacid methyl ester(5.22%), heptadecane(4.82%), lauryl ethoxylate(2.98%), 2isopropyl5methyl1heptanol (2.62%), tetracosanoic acid methyl ester(2.12%),2ethyl2methyltridecanol (2.08%), et al.

其化学成分主要为肉豆蔻酸(19.37%)，棕榈酸甲酯(7.56%)，2，6十六烷基1抗坏血酸酯(6.27%)，8，11十八碳二烯酸甲酯（5.22%），十七烷（4.82%），十二烷基乙氧基醚（2.98%），2异丙基5甲基1庚醇(2.62%)，二十四烷酸甲酯（2.12%），2乙基2甲基十三醇（2.08%）等。

A new fused polycyclic indoline compound was synthesized from aniline,with the key step of Pd-catalyzed tandem cyclization using hydroquinidine as the ligand and molecular oxygen as a green oxidant.

以芳香氨为原料，通过烯丙基化、重排、酰基化及钯催化的氧化环合反应合成了一种新的氮杂三环吲哚啉化合物，其结构经1H NMR，13C NMR，IR及HR-MS表征。

In the first part,we studied the nucleophilic addition reactions of aldehyde, amine,Zinc and benzyl bromide in one pot to afford homobenzyl and homoallyl amines in moderate to good yields.

第一部分的工作中，我们研究了Barbier型条件下醛，胺，锌粉，溴试剂一锅法的亲核加成反应。这种反应可以高效的得到高苄基和高烯丙基胺类化合物。

Comb-shaped polycarboxylic -type superplasticizers were synthesized with acrylic acid,mathacrylic acid,sodium allylsulphonateand methoxypolymethacrylatethrough aqueous copolymerization initiated by ammonium persulfate.

将甲氧基聚氧乙烯醚单甲基丙烯酸酯、丙烯酸、甲基丙烯酸和烯丙基磺酸钠进行水溶液共聚，合成了具有梳型结构的聚羧酸系高效减水剂。

Copper iodide CuI has a apparent inhibition effect on addition rearrange of the Grignard reagent with carbonyl compounds.

为抑制烯丙基格氏试剂与羰基化合物加成反应中的重排反应，进行了碘化亚铜CuI对此类格氏试剂及加成产物组分比例关系的研究，CuI对这类化合物加成反应重排有明显的抑制作用。

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。