Results 271 to 280 of about 149,811 (326)

“Cofactor”-Controlled Enantioselective Catalysis

Journal of the American Chemical Society, 2011
We report an achiral bisphosphine rhodium complex equipped with a binding site for the recognition of chiral anion guests. Upon binding small chiral guests--cofactors--the rhodium complex becomes chiral and can thus be used for asymmetric catalysis. Screening of a library of cofactors revealed that the best cofactors lead to hydrogenation catalysts ...
Dydio, P., Rubay, C., Gadzikwa, T., Lutz, M., Reek, J.N.H.   +4 more
openaire   +6 more sources

Organocatalytic Enantioselective Photoreactions

Angewandte Chemie International Edition, 2006
AbstractChemInform is a weekly Abstracting Service, delivering concise information at a glance that was extracted from about 200 leading journals. To access a ChemInform Abstract, please click on HTML or PDF.
openaire   +2 more sources

Monooxygenases Catalyzed Enantioselective Sulfoxidations

Phosphorus, Sulfur, and Silicon and the Related Elements, 1994
Abstract A study on the stereochemistry of the oxidation of sulfur by several monooxygenases using numerous organic sulfides as substrates is reported. In most cases the sulfoxidation reaction is highly enantioselective. The various factors that control the enantioselectivity have been examined.
S. Colonna, N. Gaggero
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Towards Enantioselective Nucleophilic Trifluoromethylation

Chemistry – A European Journal, 2005
AbstractVarious trifluoroacetamides and trifluoromethanesulfinamides, derived from chiral silylated amino alcohols, have been synthesized with the goal of achieving enantioselective nucleophilic trifluoromethylation. The best results were obtained with (R)‐phenylglycinol derivatives, but the ee values did not exceed 30 %.
Solveig, Roussel, Thierry, Billard, Bernard R, Langlois, Laurent, Saint-James   +3 more
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Estimating chromatographic enantioselectivity (α) from gradient enantioselective chromatography data

Chirality, 2010
AbstractCalculation of chromatographic enantioselectivity (α) is critically important in enantioselective chromatographic method development studies. The fact that α can only be calculated from isocratic elution conditions, whereas gradient elution conditions are predominantly used in method development screening, presents some problems for the use of ...
Xiaoyi, Gong, Tim, Craven, Wes, Schafer, Zainab, Pirzada, Mirlinda, Biba, Christopher J, Welch   +5 more
openaire   +2 more sources

Enantioselectivity prediction of pallada-electrocatalysed C–H activation using transition state knowledge in machine learning

Nature Synthesis, 2023
Li‐Cheng Xu, Johanna Frey, Xiaoyan Hou, Shuo-qing Zhang, Yan-Yu Li, João C. A. Oliveira, Shu-Wen Li, L. Ackermann, Xin Hong   +8 more
semanticscholar   +1 more source

Enantioselective

Angewandte Chemie (International ed. in English)
Even with only a catalytic amount of chiral bis(dihydrooxazole) 1 as external ligand, the rearrangement of benzyl ethers to alcohols [Eq. (1)] proceeds with high enantioselectivity (over 60 % ee). This reaction represents the first example of an enantioselective [1,2] Wittig rearrangement.
, Tomooka, , Yamamoto, , Nakai
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Enantioselective Hydrogenations

ChemInform, 2003
AbstractFor Abstract see ChemInform Abstract in Full Text.
Hans‐Ulrich Blaser, Benoit Pugin, Felix Spindler, Martin Studer, S. Burkhardt, R. Hausel, H. Landert   +6 more
openaire   +1 more source

Transition metal-catalyzed C-H activation reactions: diastereoselectivity and enantioselectivity.

Chemical Society Reviews, 2009
R. Giri, Bingfeng Shi, K. Engle, N. Maugel, jin-quan yu   +4 more
semanticscholar   +1 more source

Rhodium-Catalyzed Atroposelective [2 + 2 + 2] Cycloaddition of Ortho-Substituted Phenyl Diynes with Nitriles: Effect of Ortho Substituents on Regio- and Enantioselectivity.

Organic Letters, 2016
Kenichi Kashima, Kota Teraoka, H. Uekusa, Y. Shibata, Ken Tanaka   +4 more
semanticscholar   +1 more source