作者: LVAD360 時間: 2025-3-21 22:28
https://doi.org/10.1007/3-211-29483-Xhree different kinds of substituent, from a steric and stereoelectronic point of view: the lone pair of electrons, the oxygen atom and two aryl or alkyl groups give a special efficiency to sulfoxides in asymmetric synthesis.作者: 善辯 時間: 2025-3-22 02:33 作者: EXALT 時間: 2025-3-22 05:30 作者: Arthropathy 時間: 2025-3-22 10:38 作者: 扔掉掐死你 時間: 2025-3-22 13:14 作者: 易達(dá)到 時間: 2025-3-22 18:47
Der Allgemeine Umfang der Gesellschaftslehreults, it seems likely that future advances in the asymmetric version of the palladiumcatalysed allylic substitution reaction will be made through an understanding of the intermediates involved in the catalytic cycle. There are several reviews covering the scope of this reaction in a general sense..作者: Gleason-score 時間: 2025-3-22 23:14 作者: 漂泊 時間: 2025-3-23 04:45
https://doi.org/10.1007/978-3-642-94406-2ve inertness towards redox processes. With the exception of a structurally narrow group of cytotoxic titanocenes and bis-β-diketonato-complexes, titanium and zirconium compounds show no intrinsic biological activity; so far, toxic effects can only be related to the ligand..作者: 通便 時間: 2025-3-23 05:38
Die Rechtsstellung der Regierung,ure 2.1, eurve b). In the asymmetric oxidation of methyl-.-tolyl sulfide (3) and in the proline-catalysed Robinson annulation of triketone (5) (Hajos-Parrish reaetion) (Seheme 2.1), negative deviations from linearity were observed (Figure 2.1, curve c).作者: 改變 時間: 2025-3-23 12:45
Genome Organization of Begomovirusesctions have been the subject of many general reviews,. with catalysis of asymmetric Diels—Alder reactions receiving particular attention.. The aim of this chapter is to survey some of the more important recent advances in the area of asymmetric Diels—Alder reactions, with particular emphasis on applications and future developments.作者: 巨碩 時間: 2025-3-23 15:24
https://doi.org/10.1007/978-3-662-57769-1nt degree the absolute stereochemistry of these new centres may now be controlled by the incorporation of any of a number of new chiral, non-racemic ligands in the transition metal catalyst. Scheme 10.1 also highlights the problem of control of regioselectivity often associated with these reactions.作者: macabre 時間: 2025-3-23 21:00
https://doi.org/10.1007/978-3-322-92537-4f racemic esters using lipases and esterases has become routine. This rapid development has been considerably aided by the appearance of a number of excellent books. and reviews. and, for the practical work, an organic synthesis-style laboratory manual containing validated experiments..作者: 河流 時間: 2025-3-24 02:09 作者: 艱苦地移動 時間: 2025-3-24 03:34 作者: Myofibrils 時間: 2025-3-24 09:19
,Optically active β-ketosulfoxides in asymmetric synthesis,r imbalances in female parliamentary representation and their dismal political profiles. By placing Lebanon in comparative perspective, for the remainder of this book, I address concerns voiced by Donno and Russett (2004) who called for more theory and research rooted in focused case studies. The ad作者: aspect 時間: 2025-3-24 11:40 作者: flavonoids 時間: 2025-3-24 17:33
Asymmetric deprotonation reactions using enantiopure lithium amide bases,ngs are presented from a comparative perspective to illustrate the commonalities and differences found in research on Central European post-socialist countries and former Yugoslav countries. On the one hand, Slovenia’s characteristics (including the characteristics of its transition to democracy) ar作者: CHASM 時間: 2025-3-24 19:07
Transition metal catalysts for asymmetric reduction,n the electoral legislation that would favor political parties. Yeltsin welcomed enhancing the role of parties in his address, because he preferred “the communists and national-patriots to stand for elections rather than on the barricades.”. The author of these words, who ordered tanks to fire upon 作者: 加強(qiáng)防衛(wèi) 時間: 2025-3-25 02:29
Asymmetric hydroboration,e found in Western Europe. In parliamentary terms at least, Britain has been a two-party or near two-party system throughout the second half of the twentieth century. The attempts by the Liberals (later Liberal Democrats) and by the Social Democratic Party to break the two-party parliamentary ‘stran作者: 遺傳 時間: 2025-3-25 06:11 作者: 散步 時間: 2025-3-25 08:51 作者: 不妥協(xié) 時間: 2025-3-25 13:29
Asymmetric synthesis using enzymes and whole cells,entation on other computers with the help of different Pascal compilers and operating systems, one significant new development has been the implementation of the PASRO concept in the programming language C. Therefore the second edition is divided into two major parts: A. The revised and little exten作者: Parallel 時間: 2025-3-25 18:02
Asymmetric palladium-catalysed coupling reactions,d for coordinate transforma- tion for study and teaching purposes, developed as a base for high level robot programming. The study of many robot languages revealed areas for necessary improvements: 1. Move statements must be independent of a specific robot control system. They must instead be based 作者: 寬宏大量 時間: 2025-3-25 20:56
Palladium allyl ,-complexes in asymmetric synthesis, zur Sicherstellung der Portabilit?t von Programmen zwischen Produkten verschiedener Hersteller ein Standard notwendig ist, und zwar sowohl für Anwender wie Hersteller. Einleuchtend ist aber auch, da? die Normung einer Programmiersprache wenig gemeinsam hat mit derjenigen von Schrauben oder R?dern, 作者: Irrepressible 時間: 2025-3-26 00:54
https://doi.org/10.1007/978-3-322-92537-4rst examples of enantioselective Heck coupling were described independently by the groups of Shibasaki. and Overman.. Since then, there has been a rapid development of the asymmetric modification of all classes of palladium-catalysed coupling reaction, providing a synthetically direct and versatile 作者: Ascribe 時間: 2025-3-26 08:15
Chiral enolates,CI) on the left — has obliged the other parties to combine to form coalition governments despite the fact that they have relatively little in common. Italian governments are often ‘negative’ coalitions, (Di Palma, 1978, pp. 331–3), whose cohesion derives more from a desire to keep others out than from anything else.作者: 混沌 時間: 2025-3-26 09:40 作者: visual-cortex 時間: 2025-3-26 16:39 作者: 藥物 時間: 2025-3-26 18:53 作者: Osteoarthritis 時間: 2025-3-26 22:20
Transition metal catalysts for asymmetric reduction,toral laws agrees that any decision about “the most easily manipulable feature of a political system” (Taagepera and Shugart, 1989, 4) may affect many important issues, including the process of political institutionalization and the nature of the party system.作者: EXULT 時間: 2025-3-27 04:55
Front Matterth modest data sets collected for their own particular purposes. Of all of the political institutions, the executive branch of the government is by far the most important; it can be regarded as the irreducible core of government and the principal embodiment of political authority with specific powers that are978-90-481-5620-7978-94-017-2547-7作者: Psychogenic 時間: 2025-3-27 07:14
Chiral aminals in asymmetric synthesis,1950, with the Schuman Plan for a Coal and Steel Community, it took institutional form. Further landmarks in multinational linkage came with the Brussels Treaty (1948 — leading to Western European Union in 1954); NATO (1949); the Council of Europe (1949); and the European Convention on Human Rights (1950).作者: 通便 時間: 2025-3-27 11:53 作者: 來這真柔軟 時間: 2025-3-27 14:38
Asymmetric hydrosilylation and hydroformylation reactions, in Parliament’,. wrought no immediate revolution in the conduct of electoral or parliamentary politics. The act’s chief significance was its acknowledgement of urban, middle-class status; but it did not usher in a period of middle-class political ascendancy over, nor even parity with, the landed elite.作者: PANG 時間: 2025-3-27 18:05
Asymmetric synthesis using enzymes and whole cells, Wilfried Jakob. Additional thanks are dedicated to Jan Schloen and Thomas Eppting, who helped us to implement PASRO/C. We would also like to thank all readers of the first edition, who sent us their comments and corrections. Amongst these, spe- cial thanks to G. Macartney from the Queen‘s Universit作者: 表狀態(tài) 時間: 2025-3-27 22:08 作者: 清晰 時間: 2025-3-28 02:48 作者: 沒有貧窮 時間: 2025-3-28 07:50
Non-linear effects in enantioselective synthesis: asymmetric amplification,978-981-99-4522-1作者: 實(shí)施生效 時間: 2025-3-28 10:48
Stereoselective transformations mediated by chiral titanium complexes,978-3-663-11010-1作者: 職業(yè)拳擊手 時間: 2025-3-28 16:56 作者: 職業(yè) 時間: 2025-3-28 22:46
Book 1996Asymmetric synthesis is one of the most critical strategicsubjects in organic chemistry, and this book describes advancedtechniques andtheir applications to the industrial and laboratorysynthesis ofimportant chiral molecules. The international team ofhighlyrespected authors provide rigorous and concise reviews oftheir areasof expertise.作者: 滴注 時間: 2025-3-29 01:03 作者: 帶傷害 時間: 2025-3-29 04:44
978-94-010-3731-0Springer Science+Business Media Dordrecht 1996作者: 濕潤 時間: 2025-3-29 08:34 作者: Overthrow 時間: 2025-3-29 15:12
Die Rechtsstellung der Regierung,ted unique . relationships between the enantiomerie excess (ee) of a chiral auxiliary and the ee of the product obtained in these reactions.. In the titanium-mediated Sharpless epoxidation of geraniol (1) using diethyl tartrate (DET) as the ehiralligand (Seheme 2.1), the optieal purities of the epox作者: Tractable 時間: 2025-3-29 19:31 作者: 怎樣才咆哮 時間: 2025-3-29 20:42
https://doi.org/10.1007/3-211-29483-Xlecule, stabilizes a negative charge on an adjacent carbon atom, a property which has been especially important in the development of new ways to form carbon—carbon bonds. With respect to sulfides and sulfones, the sulfoxide group is of special interest because of its chirality and the presence of t作者: Fierce 時間: 2025-3-29 23:54
Die Rechtsstellung der Regierung,utral and basic media. Particularly attractive as reagents are the 5-membered ring systems (imidazolidine ring), because of the availability of chiral 1, 2-diamines and the ease of hydrolysis back to the aldehyde, which can be done under very mild acidic conditions.作者: 為現(xiàn)場 時間: 2025-3-30 07:13 作者: 高深莫測 時間: 2025-3-30 11:24 作者: agitate 時間: 2025-3-30 15:39 作者: Preamble 時間: 2025-3-30 17:43
https://doi.org/10.1007/978-3-662-57769-1only be briefly discussed here as the focus of this chapter is on the significant progress being made in ligand design. Both processes most likely proceed via hydrometallation of the alkene as outlined in Scheme 10.1. The intermediate metalalkyl (I) can then undergo overall formylation or silylation作者: Arbitrary 時間: 2025-3-31 00:17
https://doi.org/10.1007/978-3-642-94406-2t aspects of conjugate addition reactions. The focus in this chapter will be mainly on the use of non-racemic. additives, e.g. ligands and/or catalysts, in asymmetric conjugate additions. The chapter begins with a brief introduction to the chemistry of conjugate additions. After this it is organized作者: pus840 時間: 2025-3-31 04:45 作者: Etching 時間: 2025-3-31 08:12 作者: Culmination 時間: 2025-3-31 11:14 作者: 成份 時間: 2025-3-31 14:43
Der Allgemeine Umfang der Gesellschaftslehrell outline the mechanism and scope of the reaction, as well as the behaviour and properties of the π-allylpalladium intermediates. Based on recent results, it seems likely that future advances in the asymmetric version of the palladiumcatalysed allylic substitution reaction will be made through an u作者: 功多汁水 時間: 2025-3-31 21:01 作者: Gobble 時間: 2025-3-31 22:03
https://doi.org/10.1007/978-3-663-04523-6that has had the greatest effect on the way organic synthesis is planned. This is because the titanium/tartrate catalyst system proved to be the first simple method to induce asymmetry that approached the goal of universal applicability and predictability. Already in this book, several examples of t作者: 上釉彩 時間: 2025-4-1 04:29
https://doi.org/10.1007/978-3-476-05106-6perties of potential intermediates and the consequent prospects for stereocontrol at each stage of the synthesis.. The following factors are important considerations in planning an asymmetric synthesis:
