標題: Titlebook: Chiral Reactions in Heterogeneous Catalysis; Georges Jannes,Vincent Dubois Book 1995 Springer Science+Business Media New York 1995 Drogen. [打印本頁] 作者: 孵化 時間: 2025-3-21 16:34
書目名稱Chiral Reactions in Heterogeneous Catalysis影響因子(影響力)
書目名稱Chiral Reactions in Heterogeneous Catalysis影響因子(影響力)學科排名
書目名稱Chiral Reactions in Heterogeneous Catalysis網(wǎng)絡公開度
書目名稱Chiral Reactions in Heterogeneous Catalysis網(wǎng)絡公開度學科排名
書目名稱Chiral Reactions in Heterogeneous Catalysis被引頻次
書目名稱Chiral Reactions in Heterogeneous Catalysis被引頻次學科排名
書目名稱Chiral Reactions in Heterogeneous Catalysis年度引用
書目名稱Chiral Reactions in Heterogeneous Catalysis年度引用學科排名
書目名稱Chiral Reactions in Heterogeneous Catalysis讀者反饋
書目名稱Chiral Reactions in Heterogeneous Catalysis讀者反饋學科排名
作者: Kindle 時間: 2025-3-21 20:28
Strategies For Asymmetric Synthesis. What Is The Role Of Heterogeneous Catalysis?les which have potential use as pharmaceutical or agrochemical products or as new materials depend on their absolute configuration. It is thus necessary to develop efficient and economical methods which can be applied to the synthesis of complex molecular systems and meet the following stringent cri作者: 敵意 時間: 2025-3-22 01:23
Homogeneous Enantioselective Catalysisk out the differences between homogeneous and heterogeneous enantioselective catalysis and to show the contributions of homogeneous catalysis to the understanding of a catalyst‘S enantioselectivity..The most celebrated reaction in enantioselective catalysis with transition metal compounds is the hyd作者: Delectable 時間: 2025-3-22 04:42
Scope and Limitations of the Application of Heterogeneous Enantioselective Catalystsalysts (not covered are heterogeneous biocatalysts). i) .. The addition of chiral, low molecular weight modifiers to supported metal catalysts is most successful for preparing hydrogenation catalysts for α- and β-functionalized ketones. The main emphasis is on synthetic and technical applications bu作者: 使長胖 時間: 2025-3-22 10:12 作者: PANT 時間: 2025-3-22 16:42 作者: PANT 時間: 2025-3-22 20:00 作者: 抑制 時間: 2025-3-23 00:56 作者: nonplus 時間: 2025-3-23 02:01 作者: cancer 時間: 2025-3-23 06:13
Studies of the Platinum Cinchona Alkaloid Catalyst for Enantioselective α-Ketoester Hydrogenationn 1978 [1]. Since then extensive research by Wells and co-workers and Blaser, Baiker and co-workers has established the optimal reaction conditions and suggested a reaction mechanism [2,3]. Modification of the platinum surface by naturally occurring cinchona alkaloids not only effects the product en作者: cringe 時間: 2025-3-23 11:28
Asymmetric Hydrogenation of Ethyl Pyruvate Using Ptcontaining Zeolites Modified With (-)-Cinchonidinion of ethyl pyruvate to ethyl lactate. The catalysts based on Y and ZSM-35 zeolites show the highest enantioselectivity. To obtain the highest reaction rates and the optical yields the Pt content should be around 5 wt%.Enantiomeric excess is strongly influenced by the type of solvent used and can b作者: Entreaty 時間: 2025-3-23 16:12 作者: 初次登臺 時間: 2025-3-23 19:40
Enzymatic Resolution of Biologically Active Precursors Versus Asymmetric Induction in Heterogeneous is of its cyclohexyl moiety. Some strategies, especially for the enantiomerically pure fragment are brilliant pieces of organic synthesis, although somewhat elaborate [3]. The average number of steps equals ten, some approaches using enantiopure educts. The classical way to such cyclohexyl fragments作者: jeopardize 時間: 2025-3-24 01:09 作者: intrigue 時間: 2025-3-24 03:30
Restricted Geometric Relationshipsof 72% optical purity was obtained by optimizing the reaction variables and modification variables. The degree of the intrinsic enantio-differentiating ability of the adsorbed tartaric acid for 2-butanone was supposed to be similar to the abilities of tartaric acid for higher 2-alkanones.作者: 大量殺死 時間: 2025-3-24 08:21
Similarities Between Attributesof estrone and estrone-3-methyl ether [1]. The complex catalysts chiral hydrosilane-rhodium-( +)- or (-)-DIOP or (+)- or (-)-BINAP allowed different stereoselectivities in the formation of the 17α- and 17β-alcohols.作者: 漂浮 時間: 2025-3-24 11:41
Why a new semantics for extended programs?,s modified by cinchona alkaloids, are critically reviewed and compared. The characteristics and the implicit contradictions of the models are discussed in the light of relevant experimental observations.作者: 衍生 時間: 2025-3-24 18:04 作者: grovel 時間: 2025-3-24 20:06 作者: Antioxidant 時間: 2025-3-25 01:58 作者: 膠狀 時間: 2025-3-25 04:59 作者: Forehead-Lift 時間: 2025-3-25 09:33 作者: 無孔 時間: 2025-3-25 13:14
M. Dalla Chiara,R. Giuntini,R. Greechieles which have potential use as pharmaceutical or agrochemical products or as new materials depend on their absolute configuration. It is thus necessary to develop efficient and economical methods which can be applied to the synthesis of complex molecular systems and meet the following stringent cri作者: Abrupt 時間: 2025-3-25 16:56
M. Dalla Chiara,R. Giuntini,R. Greechiek out the differences between homogeneous and heterogeneous enantioselective catalysis and to show the contributions of homogeneous catalysis to the understanding of a catalyst‘S enantioselectivity..The most celebrated reaction in enantioselective catalysis with transition metal compounds is the hyd作者: 疏忽 時間: 2025-3-25 23:41 作者: Allege 時間: 2025-3-26 03:28
Similarities Between Attributesd Stewart [3]. However, it is only in the past 20 years that the subject has been studied in any detail..The requirement of asymmetric activity is the existence of a chiral environment on the catalyst surface and this may be created in one of two ways. First, by supporting the metal on a chiral supp作者: 離開 時間: 2025-3-26 08:19
Restricted Geometric Relationshipsalkanones. For the hydrogenation of 3-octanone, fine nickel powder was a better source of the catalyst than Raney nickel. 3-Octanone was hydrogenated with an optical yield of 30% over tartaric acid-NaBr-fine nickel powder. As for the effect of hydrogenation temperature on optical yield, hydrogenatio作者: Intersect 時間: 2025-3-26 12:00 作者: Arctic 時間: 2025-3-26 16:22
Similarities Between Attributesof estrone and estrone-3-methyl ether [1]. The complex catalysts chiral hydrosilane-rhodium-( +)- or (-)-DIOP or (+)- or (-)-BINAP allowed different stereoselectivities in the formation of the 17α- and 17β-alcohols.作者: 縫紉 時間: 2025-3-26 19:44 作者: dictator 時間: 2025-3-26 22:38 作者: excrete 時間: 2025-3-27 03:05
Lecture Notes in Computer Scienceion of ethyl pyruvate to ethyl lactate. The catalysts based on Y and ZSM-35 zeolites show the highest enantioselectivity. To obtain the highest reaction rates and the optical yields the Pt content should be around 5 wt%.Enantiomeric excess is strongly influenced by the type of solvent used and can b作者: 無法治愈 時間: 2025-3-27 07:47 作者: inspiration 時間: 2025-3-27 12:10 作者: 獎牌 時間: 2025-3-27 13:46 作者: 巨大沒有 時間: 2025-3-27 19:31 作者: INTER 時間: 2025-3-27 23:37 作者: Middle-Ear 時間: 2025-3-28 05:44 作者: anachronistic 時間: 2025-3-28 09:03 作者: 宴會 時間: 2025-3-28 13:24 作者: nauseate 時間: 2025-3-28 15:06 作者: 使成波狀 時間: 2025-3-28 22:48 作者: cunning 時間: 2025-3-28 22:59
Heterogeneous Asymmetric Catalysis with C2 Symmetric Amine-Modified Rhodium/SilicaSupported homogeneous catalysis is generally obtained by synthesis of material in which ligand is covalently bound to the support [1]. Such synthesis are generally neither straightforward nor easy to reproduce.作者: FUSC 時間: 2025-3-29 04:21
Strategies For Asymmetric Synthesis. What Is The Role Of Heterogeneous Catalysis?the use of a covalently bonded chiral auxiliary. This requires at first the attachment of the auxiliary to one of the reagent by a covalent bond which can be readily cleaved at the end of the sequence. The cleavage step should take place in high yields and without epimerization of the various chiral作者: ADAGE 時間: 2025-3-29 07:21
Scope and Limitations of the Application of Heterogeneous Enantioselective Catalyststo poly(aminoacids) as selective catalysts for the epoxidation of chalcones and a polymer supported dipeptide for the hydrocyanation of aldehydes. A short section describes enantioselective reactions in chiral liquid crystal and gels. iii) .. The preparation of different types of immobilized analogs作者: Apogee 時間: 2025-3-29 12:57 作者: reperfusion 時間: 2025-3-29 19:30
Studies of the Platinum Cinchona Alkaloid Catalyst for Enantioselective α-Ketoester Hydrogenationmake mechanistic elucidation difficult. In order to alleviate these problems we have been examining the application of novel colloidal catalysts to this reaction. Colloids have been shown to be more active than analogous conventional heterogeneous catalysts because of an increased active metal surfa作者: prostate-gland 時間: 2025-3-29 20:39
M. Dalla Chiara,R. Giuntini,R. Greechiethe use of a covalently bonded chiral auxiliary. This requires at first the attachment of the auxiliary to one of the reagent by a covalent bond which can be readily cleaved at the end of the sequence. The cleavage step should take place in high yields and without epimerization of the various chiral作者: Adjourn 時間: 2025-3-30 02:09
J.-J. Ch. Meyer,W. Van Der Hoekto poly(aminoacids) as selective catalysts for the epoxidation of chalcones and a polymer supported dipeptide for the hydrocyanation of aldehydes. A short section describes enantioselective reactions in chiral liquid crystal and gels. iii) .. The preparation of different types of immobilized analogs作者: 捏造 時間: 2025-3-30 07:43
Similarities Between Attributesalyst by the adsorption of a chiral modifier. These systems are (a) modification of nickel catalyst, usually Raney Ni, by α-hydroxy or α-amino acids and (b) modification of platinum catalyst with the cinchona alkaloid derivatives.作者: Assault 時間: 2025-3-30 11:38
José Júlio Alferes,Luís Moniz Pereiramake mechanistic elucidation difficult. In order to alleviate these problems we have been examining the application of novel colloidal catalysts to this reaction. Colloids have been shown to be more active than analogous conventional heterogeneous catalysts because of an increased active metal surfa作者: 縮減了 時間: 2025-3-30 13:23 作者: Perineum 時間: 2025-3-30 16:58
later on became a part ofthe Belgian corporation DCB, still very active in pharmaceuticals today. The school created by Albert Meurice merged in the fifties with another school that had been created to meet the same needs in the field of the food industries, mainly distilleries and breweries. This merger was978-1-4613-5780-3978-1-4615-1909-6作者: TRAWL 時間: 2025-3-31 00:43
An axiomatization of OL and OQLield of chirality..Indeed, while the future development potential offered by chirality is highly promising, several key questions remain to be addressed, such as :.Probably an in-depth objective analysis would yield to a major reassessment of the strategies followed by many players in the field of chirality.作者: 草本植物 時間: 2025-3-31 03:16 作者: 小鹿 時間: 2025-3-31 08:40 作者: 泄露 時間: 2025-3-31 10:35
Enzymatic Resolution of Biologically Active Precursors Versus Asymmetric Induction in Heterogeneous ucts like .. Inversion of configuration at C-4 by standard methods should provide the racemic compound ., which easily can be separated from the undesired enantiomer by enzymatic resolution yielding enantiopure . [5] (scheme 1).作者: 案發(fā)地點 時間: 2025-3-31 16:35 作者: Tincture 時間: 2025-3-31 21:22
M. Dalla Chiara,R. Giuntini,R. Greechienderstanding of a catalyst‘S enantioselectivity..The most celebrated reaction in enantioselective catalysis with transition metal compounds is the hydrogenation of prochiral olefins, specifically of dehydroamino acids to give amino acids [1]. Scheme 1 shows the hydrogenation of Z-α-acetamido cinnamic acid to N-acetylphenylalanine.作者: Conclave 時間: 2025-3-31 23:21 作者: Aspirin 時間: 2025-4-1 05:54
