| 查看: 785 | 回复: 11 | |||
| 当前主题已经存档。 | |||
| 当前只显示满足指定条件的回帖，点击这里查看本话题的所有回帖 | |||
wangyulnu荣誉版主 (著名写手)
|
[交流]
【有奖活动】我给大家来讲paper
|
||
|
为了促进大家的学术交流，请把你看懂的paper讲给别人看（中文）。这样，众多虫友不但可以互相学习，节省时间，而且事半功倍。我们需要高水平的paper，从中吸取养分。因此，大家所讲文章的影响因子必须要大于6，例如，Nature，Science，Angewandte Chemie International Edition，JACS，PNAS，Nano lett，Adv Mater等。具体格式和奖励办法如下： 【论文题目】： 【作者】： 【单位】： 【期刊名称】： 【年，卷，页】： 【影响因子】： 每篇论文奖励 5-20 个金币（由发帖人的劳动量决定） 【注意】为保证本帖的整洁，谢绝一切回复与本内容无关的帖。 [ Last edited by wangyulnu on 2006-5-26 at 17:28 ] |
回复此楼» 猜你喜欢
南方科技大学招收金属材料方向博士生
已经有23人回复
-
可降解聚酯材料在医疗器械中的应用趋势与创新方向
已经有0人回复
-
有机高分子材料论文润色/翻译怎么收费?
已经有85人回复
-
可降解微球如何提升药物精准治疗效果
已经有0人回复
-
静电纺丝膜分层问题
已经有0人回复
-
什么脱膜剂可以完全清洗干净啊？
已经有2人回复
-
暨南大学化学与材料学院赵宇亮院士正在招博士和博后，方向为生物材料和纳米医学
已经有1人回复
-
可生物降解聚酯正在重塑现代医疗器械
已经有0人回复
-
26届博士申请
已经有2人回复
11楼2006-06-24 00:46:12
★ ★ ★ ★ ★ ★ ★ ★
wangyulnu(金币+8):3x，图片好像不能显示
wangyulnu(金币+8):3x，图片好像不能显示
|
做配体的，金属催化的，N-H活化的可以引用这篇文章。 【论文题目】：Oxidative Addition of Ammonia to Form a Stable Monomeric Amido Hydride Complex 【作者】：Zhao, J., Goldman, A. S., and J. F. Hartwig 【单位】：Yale University 【期刊名称】：Science 【年，卷，页】：2005. 307(5712): p. 1080-1082. 【影响因子】：33 这是Yale的牛人John F. Hartwig教授的作品，他是金属催化方面的专家。 Zhao, J., Goldman, A. S., and J. F. Hartwig, Oxidative Addition of Ammonia to Form a Stable Monomeric Amido Hydride Complex. Science, 2005. 307(5712): p. 1080-1082. 内容简介：The insertion of an iridium complex into an N-H bond in ammonia leads to a stable monomeric amido hydride complex in solution at room temperature. This reaction advances the transition-metal coordination chemistry of ammonia beyond its role for more than a century as an ancillary ligand. The precursor for this insertion reaction is an iridium(I) olefin complex with an aliphatic ligand containing one carbon and two phosphorus donor atoms. Kinetic and isotopic labeling studies indicate that olefin dissociates to give a 14-electron iridium(I) fragment, which then reacts with ammonia. This cleavage of the N-H bond under neutral conditions provides a foundation on which to develop future mild catalytic transformations of ammonia, such as olefin hydroamination and arene oxidative amination. 中文介绍：我们知道NH3是非常稳定和廉价的气体，所以以NH3为原料合成有机胺化和物无疑是很多工业企业的梦想。然而NH3里面的N-H键并不容易被活化。而Hartwig组的赵京（音）使用了PCP的富电子的配体配合铱(ir)从而使N-H的活化成为可能。 图1中，N-H键的形成 背景工作，请看文献：Jacs,2003,125,13644 上图是催化剂复合体catalyst Complex的晶体结构。 这个图中，化和物4到5是N-H的活化。这样NH3就被利用了。 上图中表示，这两个催化复合体是竞争性的。 上图是可能的催化机理。 [ Last edited by Palladium on 2006-5-27 at 15:39 ] |
3楼2006-05-26 17:13:38
★ ★ ★ ★ ★ ★ ★ ★
wangyulnu(金币+8):Thank you very much!
wangyulnu(金币+8):Thank you very much!
|
做Pd催化的，C-C键偶连反应的，Heck反应的，离子液体的可以引用这篇作品。 【论文题目】：Ionic Liquid-Promoted, Highly Regioselective Heck Arylation of Electron-Rich Olefins by Aryl Halides 【作者】：Mo, J.; Xu, L.; Xiao, J. 【单位】：University of Liverpool 【期刊名称】：J. Am. Chem. Soc. 【年，卷，页】：2005; 127(2); 751-760. 【影响因子】：6.9 Ionic Liquid-Promoted, Highly Regioselective Heck Arylation of Electron-Rich Olefins by Aryl Halides Mo, J.; Xu, L.; Xiao, J. J. Am. Chem. Soc.; (Article); 2005; 127(2); 751-760. DOI: 10.1021/ja0450861 http://pubs3.acs.org/acs/journal ... i=10.1021/ja0450861  Abstract: Palladium-catalyzed regioselective Heck arylation of the electron-rich olefins, vinyl ethers 1a-d, enamides 1e-g, and allyltrimethylsilane 1h, has been accomplished in imidazolium ionic liquids with a wide range of aryl bromides and iodides instead of the commonly used, but commercially unavailable and expensive, aryl triflates. The reaction proceeded with high efficiency and remarkable regioselectivity without the need for costly or toxic halide scavengers, leading exclusively to substitution by aryl groups of diverse electronic and steric properties at the olefinic carbon to the heteroatom of 1a-g and to the heteroatom of 1h. In contrast, the arylation reaction in molecular solvents led to mixtures of regioisomers under similar conditions. Several lines of evidence point to the unique regiocontrol stemming from the ionic environment provided by the ionic liquid that alters the reaction pathway. The chemistry provides a simple, effective method for preparing branched, arylated olefins and contributes to the extension of Heck reaction to a wider range of substrates. 中文介绍： Heck反应是C-C键成键的重要手段。缺电型的烯烃的Heck反应一般都能得到高区域选择性的线性产物。然而，富电型的烯烃的Heck反应一般都得到线性产物和支链产物的混合物，这样，就难以得到应用。这个问题可以通过加入Ag或者Tl来解决，但是Ag盐很贵，而且效率低下，Tl效果很好，但是它的毒性是众所周知的，这样就限制这类反应的应用。然而，离子液体的使用，使这个问题得到了解决。 [ Last edited by Palladium on 2006-5-26 at 19:10 ] |
4楼2006-05-26 17:13:51
★ ★ ★ ★ ★ ★ ★ ★
wangyulnu(金币+8):刚刚听过Fu的报告，真是高手中的高手！
wangyulnu(金币+8):刚刚听过Fu的报告，真是高手中的高手！
|
做Pd催化的，C-C键偶连反应的，Suzuki反应的，可以引用这篇作品。这篇文章引用次数逼近500次（497）。 【论文题目】：Versatile Catalysts for the Suzuki Cross-Coupling of Arylboronic Acids with Aryl and Vinyl Halides and Triflates under Mild Conditions 【作者】：Littke, A. F.; Dai, C.; Fu, G. C. 【单位】：MIT 【期刊名称】：J. Am. Chem. Soc. 【年，卷，页】：2000; 122(17); 4020-4028. 【影响因子】：6.9  Fu, G. C. 是MIT的资深教授，也是JACS的编辑之一。真正的大牛。 Versatile Catalysts for the Suzuki Cross-Coupling of Arylboronic Acids with Aryl and Vinyl Halides and Triflates under Mild Conditions Littke, A. F.; Dai, C.; Fu, G. C. J. Am. Chem. Soc.; (Article); 2000; 122(17); 4020-4028. DOI: 10.1021/ja0002058 http://pubs3.acs.org/acs/journal ... i=10.1021/ja0002058 Abstract: Through the use of Pd2(dba)3/P(t-Bu)3 as a catalyst, a wide range of aryl and vinyl halides, including chlorides, undergo Suzuki cross-coupling with arylboronic acids in very good yield, typically at room temperature; through use of Pd(OAc)2/PCy3, a diverse array of aryl and vinyl triflates react cleanly at room temperature. Together, these two catalyst systems cover a broad spectrum of commonly encountered substrates for Suzuki couplings. Furthermore, they display novel reactivity patterns, such as the selective cross-coupling by Pd2(dba)3/P(t-Bu)3 of an aryl chloride in preference to an aryl triflate, and they can be used at low loading, even for reactions of aryl chlorides. Preliminary mechanistic work indicates that a palladium monophosphine complex is the active catalyst in the cross-coupling of aryl halides. 经典中的经典，做C-C coupling 的同学必看，必引的好文章。 [ Last edited by Palladium on 2006-5-26 at 19:29 ] |
5楼2006-05-26 17:14:21