查询词典 cyclopentanone

The results indicated, catalytic activity was very high, the average rate of O 2 uptake was 4.25×10 -2 mmol/min after 10 min, the yield of cyclopentanone was up to 83%.

实验结果表明，该催化体系对环戊烯的羰基化显示出较高的催化活性，反应 1 0 min，反应的平均吸氧速率为 4.2 5× 1 0 -2 mmol/min，环戊酮的收率可达 83%。

Analysis of the structural-activity relationship reveals that the a-methylene cyclopentanone moity is responsible for the antitumor activity of the diterpenoids tested.

分析其构效关系表明分子结构中的α-亚甲基环戊酮为该类化合物的细胞毒活性中心。

Cyclopentenopyridine was prepared by reaction of cyclopentanone and propargylamine in absolute ethanol,refluxing 5 h,the yield was 55%.

头孢匹罗系第四代新型超广谱头孢菌素，是由德国Hoechst公司开发的，于1992年以Cefrom的商品在瑞典首先上市的[1]。

Sixteen target compounds were designed and synthesized, basing on 2--(4-hydroxy-3-methoxybenzylidene)cyclopentanone as the lead compound, all of which are innovative and have not been reported yet.

本文以2--(3-甲氧基-4-羟基苯亚甲基)环戊酮为先导化合物，设计并合成了16个目标化合物，均为未见文献报道的新化合物。

The fluorinated polyamides could be dissolved in strong aprotic solvents and some low boiling point solvents, such as cyclopentanone, to form homogenously solution with solid content higher than 20%.

这一系列聚酰胺材料在极性溶剂或低沸点溶剂如环戊酮中都具有较好的溶解性，可以获得固含量高达20％以上的均相溶液，并在较的低温下固化成膜。

To avoid the anticipated high reactivity of exposed α-methylenecyclopentanone, Mannich bases of cyclopentanone were proposed as a masked α-methylenecyclopentanone, in expectation of achieving selectivity between tumor and normal cells.

寻找简单的、易于合成的且选择性高、活性好的抗癌或抗炎有效的小分子化合物不仅是一项具有重要理论意义和潜在的应用价值，而且是一项富于挑战性的研究课题。

Methods The target compounds were synthesized from cyclopentanone via Stork reaction, Mannich reaction and selective reduction.

方法以环戊酮为起始原料，通过Stork烯胺反应、Mannich反应、选择性还原制备目标化合物；以二甲苯致小鼠耳肿胀模型测试目标化合物的抗炎活性。

Cyclopentenopyridine(3) in yield of 65% was synthesized from acrolein ,cyclopentanone and NH3 by heterogeneous catalysis reaction through a fixed bed reactor.

以丙烯醛和环戊酮为原料，用固定床多相催化法合成了2，3-环戊烯并吡啶，收率65%，含量高于50%。

In order to increase the stability and hence increase the oral antiinflammatory activity, and as well as to de- crease or abolish the anticancer activity of type I com- pounds, an alkyl group was incorporated into the side chain of cyclopentanone Mannich base to generate type Ⅱ compounds.

为提高化合物的稳定性以使化合物经口给药时具有抗炎活性，同时降低或消除抗癌活性，本文将Ⅰ类化合物的Mannich碱侧链部位引入烷基而设计并合成了Ⅱ类化合物（共18个）。

When acetone oxime was used as substrates, lower conversion and selectivity were obtained. For cyclopentanone oxime as the substrate, the Beckmann fragmentation was observed.

对于丙酮肟和环戊酮肟，前者重排得到N-甲基乙酰胺的选择性低，后者则不发生Beckmann重排。

As she looked at Warrington's manly face, and dark, melancholy eyes, she had settled in her mind that he must have been the victim of an unhappy attachment.

每逢看到沃林顿那刚毅的脸，那乌黑、忧郁的眼睛，她便会相信，他一定作过不幸的爱情的受害者。

Maybe they'll disappear into a pothole.

也许他们将在壶穴里消失