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The wistaria tumbling over the verandas showed bright against the whitewashed brick, and it joined with the pink crêpe myrtle bushes by the door and the white-blossomed magnolias in the yard to disguise some of the awkward lines of the house.

走廊顶上交错的紫藤给粉白砖墙衬得分外鲜艳,它同门口那几丛粉红的紫薇和庭院中开着的白花木兰连成一起,便把这所房子的笨拙外貌掩饰了不少。

In Lake Woebegone it seems all the women are pretty, all the men are handsome, and all the kids are well above average.

所有的女人都被湖水得美丽,男人变的英俊,就连孩子也看上去比一般的聪明。

About the also sprach zarathustra, the writer took the literature style reading, and paid special attention to the significant imagery.

对《查拉图斯特拉如是说》一书,笔者采取了文学式的阅读,抓提其中重要的意象,以此证之前关于虚无主义的几种论述、解释。

The attempt to hydrogenation of the alkenyl phthalides has been proved promising, and 55% ee value was the best selectivity by far. But the reault was not very repeatable.

对于烯基苯酞的不对称氢化进行了一定尝试,目前对选择性最高可以获得55%,但是目前结果还不是很稳定。

Their diasteroisomers were achieved because the group of alkoxy assaulted C_1 of 2-deoxyribofuranosyl chloride from different directions.

因烷氧基可从呋喃脱氧糖环的不同方向进攻1-位碳原子,因而所得到的烷基呋喃脱氧戊糖苷是一对非对异构体。

It was found that the binaphthyl backbone of S configuration was matched to the S, S pyrrolidino group. In this case, the asymmetric allylation product could be obtained in 85. 6% ee.

轴手性是S构型时,和中心手性S,S构型相匹配,它和钯形成的络合物在催化烯丙基取代反应时,取得了比不含中心手性因素的吡咯烷基氮膦配体高得多的对选择性,可以得到85.6%ee值的产物。

E. value of productions were detected by high performance liquid chromatography. Results The chiral aminoalcohol ligand compound Ⅰ can promote the asymmetric allylation of acylhydrazones and the yield was 57%; The highest values of e. e. obtained for this reaction was 22%.

结果 手性氨基醇配体化合物Ⅰ能够促进烯丙基三氯硅烷和酰腙的烯丙基化加成反应,在它的辅助作用下,烯丙基化加成产物的产率可达到57%,对体过量值最高达到22%。

Under the optimum reaction conditions,:benzalacetone:Ru:KOH=1000:1:20, 2 MPa, 30℃, and 2h, the conversion and the selectivity toward the unsaturated alcohol was reached 99% and 99%, respectively, and the ee value of unsaturated alcohol was over 58.9%.

在优化的反应条件下,苄叉丙酮加氢反应的转化率大于99%,生成α,β-不饱和醇的选择性大于99%、对选择性达到了58%ee以上。

To our surprise we achieved the ligand 9, 11 and 29 with coordinating atoms fixing at benzylic and benzene ring positions, whose structure is unique in the planar chiral cyclophane chemistry.

以钯催化的烯丙基取代反应对配体进行了考察,硫醚或硒醚取代基在苄位取代的配体表现出更高的反应活性和更高的对选择性,配体9和11均给出最高为94%的ee值。

In addition ,nine new O,O-dialkyl-[α-(1,3,4,6-tetraacetyl-2-deoxy-β-D-glucoamino)-p-methyl benzlidene] phosphonatesand eight O,O-dialkyl-α-(2-deoxy-D-glucoamino)-p-methyl benzylidene phosphonates were prepared. The 〓 and〓 spectra of Ⅰ-Ⅴ compounds indicated clearly that each of Ⅰ-Ⅴ compounds contains two diastereo-isomers.

我们对非对异构体的分离方法进行了研究,并分离得到了五个单一构型的异构体〓、〓、〓、〓和〓,培养出了〓、〓和〓三个异构体的单晶,通过X-射线衍射分析,确定了〓、〓和〓三个异构体的绝对构型,反应过程中引入的手性原子的构型均为R构型。

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Lao Qiu is the Chairman of China Qiuyang Translation Group and the head master of the Confucius School. He has committed himself to the research and promotion of the classics of China.

老秋先生为中国秋阳翻译集团的董事长和孔子商学院的院长,致力于国学的研究和推广。