环烯

A process for preparing clean gasoline features that under existance of epoxidizing catalyst and alkoxylating catalyst, the olefine in gasoline and the oxygen and alcohol take part in epoxidizing and alkoxylating reactions to generate diolmonoether or dioldiether compounds which has higher octane number, so being excellent gasoline component.

本发明公开了一种清洁汽油的生产方法，在一个具有环氧化的催化剂以及同时具有烷氧化催化组分或者催化剂的存在下，汽油中的烯烃与氧、醇、发生环氧化、烷氧基化反应而生成二醇单醚或二醇双醚类化合物，这类化合物具有较高的辛烷值，是优良的汽油组分。

The mechanism of the UV-induced photochemically photochromic process of 1,2-bis-(2',5'-bimethyl)-3'-thienyl-perfluoro-cyclopentene was investigated using two-dimensional(2D) FTIR spectroscopy.

利用二维相关红外光谱方法首次研究了1，2-二（2'，5'-二甲基-3'-噻吩）－全氟环戊烯在紫外光照引发下发生光化学闭环反应的历程。

Seven of them have not been reported.Their structures were confirmed by IR,~1HNMR,MS,and element analysis. 4.Meanwhile,the green methylation procedure of imides was developed by using dimethyl carbonate as methylation reagent.A series of imides,for example,phthalimide,3,4-dibromo-maleimide and succincide were used for substrates.The effects of DABCO(1,4-diazabicyclo [2.2.2]octane)and DBU(1,8-diazabicyclo[5.4.0]undec-7-ene)as a catalyst in this kind of reactions were investigated.2-Bromo-3-(1-methylindolyl-3-yl)-1-methyl-1H-pyrrole-2,5-dione was prepared by using dimethyl carbonate,which further expanded the use of dimethyl carbonate,as a green agent in organic synthesis.

在以硫酸二甲酯为甲基化试剂对3，4-二溴马来酰亚胺进行N-甲基化反应合成3，4-二溴-N-甲基马来酰亚胺的同时，以碳酸二甲酯为甲基化试剂，对3，4-二溴马来酰亚胺、邻苯二甲酰亚胺、琥珀酰亚胺等酰亚胺类化合物的N-甲基化反应进行了研究；考察了1，4-二氮杂双环[2.2.2]辛烷，1，8-二氮杂双环[5.4.0]十一碳-7-烯、碳酸钾和四丁基溴化铵等作为催化剂对碳酸二甲酯N-甲基化反应的反应时间和收率等的影响，并应用碳酸二甲酯为甲基化试剂，合成了N-甲基-3-溴-4-(1-甲基-吲哚-3)-马来酰亚胺。

Fourthly, The preparation of 1 -triazolyl-2-isoxazolinyl substituted-ethenes was developed through an one-pot 1, 3-dipolar cycloaddition of NaN_3 and RI,α-alkylation reaction of substituted allyl bromides and 1, 3-dipolar cycloaddition of nitrile oxidesbased on polystyrene-supported propargyl selenide.

四、从聚苯乙烯负载的炔丙基硒醚出发，通过与叠氮化钠和碘化物的一锅法1，3-偶极环加成反应、取代烯丙基溴的α-烷基化反应和腈氧化物的1，3-偶极环加成反应固相合成了1—三唑—2—异噁唑啉取代的-乙烯。

The chiralMn complexes, especially Jacobsenscatalyst, display high enantioselectivity for asymmetric epoxidation of conjugated cis-di-, tri-and some tetrasubstituted prochiral alkenes in the NaClO biphasic system, but the epoxidationreaction generally requires a long reaction time even in the presence of an axial ligand.

在NaClO两相体系中，手性Mn配合物，尤其是Jacobsen催化剂，对共轭顺式二取代、三取代和部分四取代烯烃的不对称环氧化具有高的对映选择性，然而即使存在轴向配体，环氧化反应也通常需要长的反应时间。

The chiralMn complexes, especially Jacobsen\'scatalyst, display high enantioselectivity for asymmetric epoxidation of conjugated cis-di-, tri-and some tetrasubstituted prochiral alkenes in the NaClO biphasic system, but the epoxidationreaction generally requires a long reaction time even in the presence of an axial ligand.

在NaClO两相体系中，手性Mn配合物，尤其是Jacobsen催化剂，对共轭顺式二取代、三取代和部分四取代烯烃的不对称环氧化具有高的对映选择性，然而即使存在轴向配体，环氧化反应也通常需要长的反应时间。

The side chain of thioacetic acid has been sythesized from the material of acetic acid via four steps, then synthesized the key intermediate of 2-hydroxypenem via displacement, P〓induced cyclization and hydrolyzed reaction from the material of azetidinone.

以羟乙酸为原料，经四步反应合成了侧链化合物硫基取代的羟乙酸，发生取代反应导入到经七步合成的单环氮杂环丁酮中，然后发生酰化，Wittig诱导环化，水解等五步反应合成关键中间体2-羟甲基青霉烯。

All ofthese reactions were carried out under mild conditions and are new effective methodsfor the preparation of indolizine derivatives. The reaction of phthalazinium and quinoxalinium N-ylides with electron-deficientolefins in the presence of oxidants have also been studied, it has been found that activemanganese dioxide could behave as a dehydrogenating oxidant. Pyrrolo[2,1-a]phthalazines and pyrrolo[1,2-a]quinoxalines are obtained in this way.

本文还对六员二氮杂环化合物酞嗪和喹喔啉的N-叶立德在氧化剂存在下与缺电子烯烃的l，3-偶极环加成反应作了研究，发现活性二氧化锰也是一个优良的氧化剂，并分别合成得到了吡咯并[2，1-a]酞嗪和吡咯并[1，2-a]喹喔啉衍生物。

The main by-product s and their separation and recovery technologies were discussed for cyclohexanone gas-phase Beckmann rearrangement.

探讨环己酮肟气相Beckmann重排主要副产物及其分离回收方法，研究1-氮杂-2-乙氧基-1-环庚烯、1，3，4，5-四氧吖庚因-2-酮及其同分异十句体等副产物回收利用生成已内酰胺的方法。

At Pt electrode, DHA undergoes hydration reaction to form bicyclic product, and then further transform into 2, 3-diketogulonic acid and its enol form via the opening of lactone ring. At CuCoHCF/Pt electrode, DHA undergoes ring-opening reaction followed by degradation reactions.

但后行反应不同：在裸Pt电极上，DHA进行水化反应生成了双环结构产物，而后开环形成羧酸或烯醇结构；在CuCoHCF/Pt电极上，DHA水化反应生成开环产物，进一步又发生降解反应。

I didn't watch TV last night, because it .

昨晚我没有看电视，因为电视机坏了。

Since this year, in a lot of villages of Beijing, TV of elevator liquid crystal was removed.

今年以来，在北京的很多小区里，电梯液晶电视被撤了下来。