氢化

Then Doripenem came into the market in the July ,2005. We studied the synthesis of Doripemen.Firstly, we synthesized the chemical 2 from the starting material------o-hydroxylphenylacylamine through Reformastky reaction, alkylation, Diekmann reaction, enolization, esterification and etc. Secondly, we synthesized the chemical 3 from L — hydroxylproline through the protection of carboxyl, amidogen and hydroxyl group, reduction by NaBr, SN_2 substitution and Mitsumobu reaction.

我们以水杨酰胺为起始原料，经Reformatsky反应、烷基化、Diekmann环合、烯醇化、酯化等反应合成双环母核2；再从L-羟基脯氨酸出发，经酯化保护羧基、保护氨基、保护羟基、硼氢化还原酯得醇、Sn2取代和Mitsumobu反应等合成巯基侧链3；最后由化合物3经脱保护、水解得硫醇，和化合物2在二异丙基乙基胺的作用下缩合，最后Pd／C催化脱保护，历经16步反应最终得到产物多尼培南。

They were subjected to a 〓 reaction with sodium azide, hydrogenation, amidation,hydrolysis and Jones oxidation to afford 112 and 116, respectively.

它们分别经过与叠氮化钠的亲核取代反应、氢化、酰胺化、N〓催化的水解，Jones氧化以后分别给出化合物112和116。

The insufficiencies of current models for the hydrogenation/dehydrogenation are analyzed and summarized,and the development trends for future research are proposed.

最后对现有模型存在的不足作出了总结，并对未来的金属氢化物氢化/脱氢反应动力学模型研究进行了展望。

The used catalyzer is in as-cast or hydrogenization state and is prepared by mixing magnesium metal and Ti-V based alloy for catalyzer together and then ball-milling the mixture for 0.5-5 hours under hydrogen atmosphere of 1-50 atmosphere pressures.

所使用的催化剂为铸态或氢化态；制备的方法是将镁金属与作为催化剂Ti-V基合金混合后，在氢气氛下球磨0.5-5小时，球磨时所用的氢压为1-50大气压。

The experiment results show that the yield of hexane catalyzed by the nano-fibrous catalyst was 4.7 times higher than that of PdCl_2/γ-Al_2O_3 catalyst. The hydrogenation ofα-tetradecylene, cyclohexene, nitrobenzol and styrene by the nano-fibrous catalyst was also studied, the selectivity to primary products of the hydrogenation of cyclohexene, nitrobenzol and styrene was 100%.

苯乙烯-丙烯腈共聚物负载纳米钯超细纤维形态催化剂在常温，氢气压力101.3Pa下催化α-己烯加氢时表现出很高的活性，催化剂PSAN-Pd10催化氢化α-己烯选择生成正己烷的产率在150 min就达到87%以上，与无机物负载的催化剂相比，加氢效果有显著提高，并且催化剂的重复使用性较好。

The mechanism of formation of light-end products during M-HyPy was discussed.The results indicated that higher concentration and yields of BTX,PCX and naphthalene were found in M-HyPy as compared to HyPy,which is resulted from promoting hydrogenation and inhibiting repolymerization of free radicals due to the retention of hydrogen in M-HyPy.

结果表明：煤的多段加氢热解过程所得油品与传统的单段加氢热解油品相比，含有更丰富的高经济价值组分，如苯、甲苯、二甲苯和酚、甲酚、二甲酚及萘，这主要是因为氢气在峰温处的停留促进了自由基的氢化饱和及抑制了其再聚合的反应。

Chiral 3 methy 1,4 butanediol and its derivatives are the important intermediate of synthesis of chiral smectic liquid crystal polyesters and chiral natrual products with biological activity. In the paper, a new efficient route of 3 methyl 1,4 butanediol and its two derivatives, 2 methyl 4 tetrapyranyloxy 1 butanol and 2 methyl 4 tetrapyranylbutanal, was described, and the target products were synthesized by employing asymmetric hydroboration oxidation improved.

手性2－甲基－1，4－丁二醇及其衍生物是合成各种手性近晶型液晶材料以及手性天然生物活性物质的重要中间体，以3－甲基－3－丁烯－1－醇为原料利用改进的不对称硼氢化－氧化反应，成功地合成了－2－甲基－1，4－丁二醇以及其2种手性衍生物：－2－甲基－4－四氢吡喃氧基－1－醇和－2－甲基－4－四氢吡喃氧基丁醛。

Catalytic cracking ; gasoline stock ; hydrogen donor solvent ; hydrogen transfer ; tetralin

催化裂化；汽油料；供氢溶剂；氢转移；四氢化萘

The catalyst under high temperature hydrolysis into fatty acids and glycerol, with the metal oxides can happen saponification reaction, Formation of metal soap and glycerin, but also for halide, sulfate, sulfonation, oxidation, hydrogenation, polymerization and pyrolysis reaction.

可在催化剂作用下高温水解成脂肪酸和甘油，与金属氧化物能发生皂化反应，生成金属皂和甘油，还可进行卤化、硫酸化、磺化、氧化、氢化、聚合、热解等反应。

Techniques commonly used in the kinetic measurement for metal hydrides and the relative data processing and analysis are reviewed.

并概述了测定金属氢化物氢化/脱氢反应动力学常用的实验技术以及相关的数据处理和分析。

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。