烯酮

It is 4 steps to synthesize benzal dehyde frOm CO2,and we can gain Quinocedox next step.

以CO_2 和溴苯为起始原料经历4步即可获得苯甲醛，再进一步就合成了目标化合物喹烯酮。

In the second part of this thesis, a formal [2+2] cycloaddition ketenes and dialkyl azodicarboxylates was studied. We found that by adjusting the substituents in the diazenes, the reaction mode can be completely switched, and furnish four-membered-ring products, aza-b-lactams, the enantioselectivity was up to 91%.

经研究发现，通过对偶氮化合物取代基团的改变，我们可以实现[4+2]环加成反应到[2+2]环加成反应的转变，在手性氮杂环卡宾的作用下，对具有各种取代基的烯酮都可以很好的产率得到氮杂b-内酰胺，其对映选择性最高可以达到91%。

The Nazarov cyclization, a powerful tool for the construction of five-membered carbocycles from divinyl ketones and related compounds, has attracted increasing attention in recent years due to its wide applications in the synthesis of complex natural and unnatural products.

Nazarov环合反应是通过二烯酮类物质和类似化合物构建五元碳环的有效方法。由于该方法广泛地应用于复杂天然和非天然产物的合成，近年来引起人们的广泛关注。

Zearalenone, i.e.F-2 toxin, is a mycotoxin produced by Fusarium species. Itmainly empoison feed and cropper, such as wheat oat corn and so forth.

玉米赤霉烯酮(zearalenone，ZEA)，又称F-2毒素，是一种由三线镰刀菌等真菌产生的霉菌毒素，主要污染小麦、大麦、玉米等农作物和动物饲料。

Abstract］ Objective To compare the effect of different drug in the treatment of endometrial cyst of ovary after laparoscopy.Methods One hundred and fifty-four patients undergoing laparoscopy were divided into four groups,36 without endocrinal therapy;41 with danazol 400 mg qd;42 with gestrinone 2.5 mg qiw;35 with mifepristone 12.5 mg qd.

目的 比较卵巢子宫内膜异位囊肿腹腔镜手术辅以不同药物治疗的疗效方法 1998年8月～2003年2月我院卵巢子宫内膜异位囊肿腹腔镜手术患者154例，单纯腹腔镜手术组36例；加用丹那唑组41例，每日1次，每次400 mg，连服6 月；加用孕三烯酮组42例，每周2次，每次2.5 mg，连服6个月；加用米非司酮组35例，每日1次，每次12.5 mg，连服6个月。

Methods One hundred and fifty-four patients undergoing laparoscopy were divided into four groups,36 without endocrinal therapy;41 with danazol 400 mg qd;42 with gestrinone 2.5 mg qiw;35 with mifepristone 12.5 mg qd.

1998年8月～2003年2月我院卵巢子宫内膜异位囊肿腹腔镜手术患者154例，单纯腹腔镜手术组36例；加用丹那唑组41例，每日1次，每次400 mg，连服6个月；加用孕三烯酮组42例，每周2次，每次2.5 mg，连服6个月；加用米非司酮组35例，每日1次，每次12.5 mg，连服6个月。

Objective: In order to provide sensitive and reliable technique for the study of the relationship between enviromental estrogens and diseases, analytical methods for three kinds of representative environmental estrogens such as mycotoxins (zearalenone and its metabolites, aflatoxin B_1 and ochratoxin A), persistent pesticide pollutants (hexachlorocyclohexane and dichlorodiphenyltrichloroethane) and industrial chemicals (bisphenol A and 4-nonylphenol) with chromatography were to develop.

目的：选择三种有代表性的环境雌激素：真菌类毒素(玉米赤霉烯酮及其代谢物及赭曲霉毒素A、黄曲霉毒素B_1)、农药类持久性污染物(666、DDT)和化工原料类雌激素为对象，分别研究它们的检测方法，为监控环境激素和研究它们与疾病之间关系提供灵敏、可靠的分析方法和实验依据。

A Michael addition of dimethyl malonate and 2-pentyl-cyclopentenone could conduct a precursor which used for preparing aim compound by a selective decarboxylation.

中间体化合物2-戊基环戊烯酮在一定条件下经Michael加成和选择性脱羧反应合成目标化合物。

In this study aldylencdithiomethylene Malonic acid acts as the main coordination agents and compound iron ion have been synthesized by the means of solution, As a result ,the 1D polymer is obtained.

本论文采用常规的溶液合成方法，首先设计合成了一个以含有二硫缩烯酮结构的丙二酸类配体和过渡金属铁离子的单核配合物，再以此单核配合物作为配体设计合成了三个异多核配合物和配位聚合物。

In this research, two novel compounds in which alkylenedithiomethylene Malonic acid act as the main coordination agents and the compounds containing N atom (such as pyridine, Phenanthroline Ethanediamine and 4,4'-Bipyridinyl) act as the associating coordination agents have been synthesized by the means of solution and solid-liquid diffusing reactions. 9 coordination complexes and polymers have been designed and synthesized in which the transition metals Cu and Zn acted as the centre ions. These compounds have been characterized by X-ray single crystal diffraction analysis, and some properties of them have been tested and analyzed.

本论文设计合成了两种结构新颖的含有二硫缩烯酮结构的丙二酸类化合物，以此为主要配体，以含氮化合物(吡啶、邻菲罗啉、乙二胺和4，4'-联吡啶)为辅助配体，采用常规溶液合成和固-液相扩散等方法，设计合成了9个过渡金属Cu和Zn离子配合物和配位聚合物，采用单晶X-射线衍射等技术对晶体结构表征，并对其部分性质进行了测试和分析。

According to the clear water experiment, aeration performance of the new equipment is good with high total oxygen transfer coefficient and oxygen utilization ratio.

曝气设备的动力效率在叶轮转速为120rpm～150rpm时取得最大值，此时氧利用率和充氧能力也具有较高值。

The environmental stability of that world - including its crushing pressures and icy darkness - means that some of its most famous inhabitants have survived for eons as evolutionary throwbacks, their bodies undergoing little change.

稳定的海底环境─包括能把人压扁的压力和冰冷的黑暗─意谓海底某些最知名的栖居生物已以演化返祖的样态活了万世，形体几无变化。