Results 21 to 30 of about 39,817 (294)
Molecules, 2021 The importance of yeast old yellow enzymes is increasingly recognized for direct asymmetric reduction of (E/Z)-citral to (R)-citronellal. As one of the most performing old yellow enzymes, the enzyme OYE3 from Saccharomyces cerevisiae S288C exhibited ...
Tairan Wang +10 more
doaj +1 more source
Enantioselective adsorption on magnetic surfaces [PDF]
Adv. Mater. 36, 2308666 (2024), 2022 From the beginning of molecular theory, the interplay of chirality and magnetism has intrigued scientists. There is still the question if enantiospecific adsorption of chiral molecules occurs on magnetic surfaces. Enantiomer discrimination was conjectured to arise from chirality-induced spin separation within the molecules and exchange interaction with
arxiv +1 more source
Asymmetric Hydrogenation of 1-alkyl and 1-aryl vinyl benzoates: a broad scope procedure for the highly enantioselective synthesis of 1-substituted ethyl benzoates [PDF]
, 2014 The enantioselective hydrogenation of enol esters of formula CH2=C(OBz)R with rhodium catalysts based on phosphine-phosphite ligands (P-OP) has been studied.
Cadierno, Victorio +4 more
core +1 more source
Frontiers in Chemistry, 2020 A series of copper(II) complexes with chiral tetradentate ligands, N,N′-ethylene- bis(S-amino acid methyl amide or methyl ester) prepared from S-alanine, S-phenylalanine, S-valine or S-proline, was generated in methanol.
Takashi Nakakoji +11 more
doaj +1 more source
Enantioselective synthesis of (−)-paeonilide [PDF]
Chemical Communications, 2012 The first enantioselective synthesis of (−)-paeonilide is reported. Starting from inexpensive furan-3-carboxylic acid the targeted monoterpene was obtained in 12 steps via an asymmetric cyclopropanation-lactonization cascade and a stereoselective side chain insertion at an acetal-like position.
Harrar, Klaus, Reiser, Oliver
openaire +4 more sources
Phosphoramidite Gold(I)-Catalyzed Diastereo- and Enantioselective Synthesis of 3,4-Substituted Pyrrolidines [PDF]
, 2011 In this article the utility of phosphoramidite ligands in enantioselective AuI catalysis was explored in the development of highly diastereo- and enantioselective AuI-catalyzed cycloadditions of allenenes.
Benitez, Diego +4 more
core +3 more sources
Asymmetric additions to dienes catalysed by a dithiophosphoric acid. [PDF]
, 2011 Chiral Brønsted acids (proton donors) have been shown to facilitate a broad range of asymmetric chemical transformations under catalytic conditions without requiring additional toxic or expensive metals.
Hamilton, Gregory +4 more
core +2 more sources
Kinetic resolution of racemates under chiral catalysis: connecting the dots [PDF]
, 2012 The current theory of the titled phenomenon is apparently based on an inconsistent use of concentration units, as employed in the derivation of the fundamental equations. Thus, manifestly, whilst the relation between extent of conversion and e.e.
Sosale Chandrasekhar
core +2 more sources
Life, 2012 The invariance principle of enzyme enantioselectivity must be absolute because it is absolutely essential to the homochiral biological world. Most enzymes are strictly enantioselective, and tryptophanase is one of the enzymes with extreme absolute ...
Akihiko Shimada, Haruka Ozaki
doaj +1 more source
Rotation and electric-field responses and absolute enantioselection in chiral crystals [PDF]
Phys. Rev. Lett. 129, 116401 (2022), 2022 Microscopic origin of chirality and possible electric-field induced rotation and rotation-field induced electric polarization are investigated. By building up a realistic tight-binding model for elemental Te crystal in terms of symmetry-adopted basis, we identify the microscopic origin of the chirality and essential couplings among polar and axial ...
arxiv +1 more source