烯酮

For most of the enones and allylic alcohols, the reaction could be completed within several hours with good yields.

反应无需有机溶剂，对于大部分的烯酮和烯丙基醇反应可以在数小时内完成，产率良好。

Part 2. Annulation reaction of 3, 4-dichlorocoumarin (1) and 3, 4-dichloromaleimide (8) by a new general annulation strategy developed in this group with 2-phenylbenzofuran (15), 3-phenylbenzofuran (16), 2, 5-diphenyloxazole (17), 2, 5-diphenylthiazole (18), 2-methyl-4-phenylthiazole (19) and 2, 3-dimethoxy-1, 3-butadiene (40) were investigated.

二。在本课题组前一阶段提出的从二氯代环烯酮与1，1-二芳基乙烯的光化反应以及光化反应中得到的环丁烷产物的连续电环化反应对3，4-二氯马来酰亚胺以及3，4-二氯香豆素进行增环反应的工作基础上，研究了3，4-二氯香豆素（1）和3，4-二氯马来酰亚胺（8）与5个α-苯基取代的环烯烃2-苯基苯并呋喃（15），3-苯基苯并呋喃（16），2，5-二苯基噁唑（17），2，5-二苯基噻唑（18），2-甲基-4-苯基噻唑（19），以及一个丁二烯——2，3-二甲氧基丁二烯（40）进行的芳香族增环反应。

The yield of rosemary oil was 2%-3%. The constituent analysis of rosemary oil showed that the essential oil mainly contains α-pindne, 1, 8-cineole, camphene, camphor, verbenone, borneol, terpinen-4-ol, limonene, and bornyl acetate.

迷迭香精油的得率在2%~3%，主要含有α-蒎烯、1， 8-桉叶素、莰烯、樟脑、马鞭草烯酮、龙脑、4-松油醇、苎烯和乙酸龙脑酸等成分。

Results: the yield rate of the collected volatile oil of artemisia indica and artemisia feddei was 0.32%, 0.29%, respectively. the main constituents of them were as follows: eucalyptol, camphor, borneol, terpineol, cubebene, caryophyllene, caryophyllene oxide, germacrene d, etc, which was similar to the constituents of volatile oil from artemisia argyi. but the contents of volatile oil were different in different medicinal materials. longiverbenone with high content in artemisia feddei was can not be detected in artemisia indica and artemisia argyi.

结果：广西产五月艾与细叶艾挥发油的得率分别为0.32%、0.29%；五月艾、细叶艾和艾叶挥发油中均含有桉油精、樟脑、龙脑、松油醇、荜澄茄油烯、石竹烯及其氧化物、大根香叶烯d等药效成分，但各成分在不同药材中的含量存在一定差别；此外，细叶艾挥发油中含量较高的长叶马鞭烯酮在五月艾和艾叶挥发油中均未检出。

Therefore, studies on the synthesis and the applications ofα-alkenoyl ketene dithioacetals should be a valuable research project.

因此，α-烯酰基二硫缩烯酮的合成及其在合成中的应用研究是一重要的研究课题。

Based on our early work, we will discuss the coupling the Nazarov cyclization-halogenation reaction ofα-alkenoyl ketene dithioacetals under Vilsmeier conditions.

基于以上的研究，本文着重讨论了(来源：ABacC论文cece网www.abclunwen.com)α-烯酰基二硫缩烯酮在Vilsmeier试剂作用下的Nazarov环合反应。

In the end, a Novel and facile method has been used to synthesize functionalized cyclopentadienes by Nazarov cyclization ofα-alkenoyl ketene dithioacetals under Vilsmeier conditions.

从合成的α-烯酰基二硫缩烯酮类化合物出发，经过Vilsmeier试剂作用下的Nazarov环合反应，合成了官能化环戊二烯类化合物。

The searching result indicated that many components such as 2-Heptenal,-, Hexadecanal, Octadecanal, Megastigma-4, 6, 8-triene and Megastig-matrienone were identified the first time in studies of aroma components of Chaenomeles fruits.

检索结果表明，试验检测出的-2-庚烯醛、十六醛、十八醛、甲酸叶醇酯、辛酸环己酯、4，6，8-巨豆三烯、巨豆三烯酮等多种化合物，在木瓜果实香气成分研究中尚属首次发现。

The related reaction conditions and factors such as catalysis of some catalysts etc were discussed. In the procedures, 2-pentylidene cyclopentanone intermediate, which could be isomerizated into a 2-pentyl cyclopentenone under acidic conditions, was effectively prepared in the presence of a phase transfer promotor.

讨论了正戊醛和环戊酮在碱性条件下缩合生成2-亚戊基环戊酮的反应温度、碱浓度、相转移催化剂等因素对反应的影响。2-亚戊基环戊酮中间体化合物能在酸催化剂作用下，异构成2-戊基环戊烯酮，其中酸浓度和溶剂等参数对反应影响明显。

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。

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。