Results 121 to 130 of about 3,273,294 (390)
Molybdenum‐Catalyzed Asymmetric Amination of α‐Hydroxy Esters: Synthesis of α‐Amino Acids
Advanced Science, EarlyView.N‐protected unnatural α‐amino acids are synthesized from α‐hydroxy esters and amines in a Mo‐catalyzed reaction. The formation of C─N bond takes place in a highly efficient way, which can be rendered asymmetric when a chiral molybdenum‐complex and chiral phosphoric acid (CPA) are used.
Shahida Perveen +5 more
wiley +1 more source
Angewandte Chemie, EarlyView.A single‐step biocatalytic route to complex indolizidine and quinolizidine alkaloids is described that relies on transaminase‐triggered double intramolecular aza‐Michael methodology. In one case, a retro‐double intramolecular aza‐Michael reaction enables dynamic kinetic resolution. Abstract Biocatalysis is now a well‐established branch of catalysis and
Adam O'Connell +10 more
wiley +2 more sources
Nature CommunicationsThe field of nickel catalysis has witnessed remarkable growth in recent years. However, the use of nickel catalysts in enantioselective C–H activation remains a daunting challenge because of their variable oxidation states, intricate coordination ...
Qi-Jun Yao +3 more
doaj +1 more source
Algicidal lactones from the marine Roseobacter clade bacterium Ruegeria pomeroyi
Beilstein Journal of Organic Chemistry, 2012 Volatiles released by the marine Roseobacter clade bacterium Rugeria pomeroyi were collected by use of a closed-loop stripping headspace apparatus (CLSA) and analysed by GC–MS.
Ramona Riclea +5 more
doaj +1 more source
Molybdenum-catalyzed enantioselective sulfoxidation controlled by a nonclassical hydrogen bond between coordinated chiral imidazolium-based dicarboxylate and peroxido ligands [PDF]
, 2018 Chiral alkyl aryl sulfoxides were obtained by molybdenum-catalyzed oxidation of alkyl aryl sulfides with hydrogen peroxide as oxidant in mild conditions with high yields and moderate enantioselectivities.
Carrasco Carrasco, Carlos Jesús +2 more
core
Enantioselective formal synthesis of (+)-madangamine A
Chemical Communications, 2019 A formal synthesis of (+)-madangamine A from phenylglycinol-derived lactam 1, involving the final closure of the peripheral rings from the skipped polyunsaturated diazatricyclic derivative 19, is reported.
Celeste Are +3 more
openaire +4 more sources
Enantioselective Total Synthesis of (+)-Jasplakinolide [PDF]
Organic Letters, 2007 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.
Arun K. Ghosh and, Deuk Kyu Moon
openaire +4 more sources
Advanced Science, EarlyView.The authors introduce a high‐throughput synthesis using amide‐sulfoxonium ylides as new nucleophilic reagents, enabling a catalyst‐ and base‐free hydrocarbonation of terminal alkynes under mild conditions, resulting in various E‐alkene substituted (hetero)amide‐sulfoxonium ylides with excellent regio‐ and stereoselectivity. The late‐stage modifications
Haiting Wu +6 more
wiley +1 more source
Angewandte Chemie, EarlyView.A strategy for the α‐arylation of carbonyl compounds is presented. The Cu‐ and Pd‐catalyzed reaction involves 1,2‐arylboration of electron deficient alkenes and proceeds with high levels of selectivity. The mechanism is addressed and suggests that a boron ligated enolate is responsible for high selectivity.
Suman Das +4 more
wiley +2 more sources
Enantioselective Ni-Catalyzed Electrochemical Synthesis of Biaryl Atropisomers.
Journal of the American Chemical Society, 2020 A scalable enantioselective nickel-catalyzed electrochemical reductive homocoupling of aryl bromides has been developed, affording enantioenriched axially chiral biaryls in good yield under mild conditions using electricity as a reductant in an undivided
Hui Qiu +8 more
semanticscholar +1 more source