Results 251 to 260 of about 119,652 (298)
Some of the next articles are maybe not open access.
International Journal of Mass Spectrometry, 2000
Abstract Determination of the intrinsic noncovalent interactions governing chiral recognition in diastereomeric complexes constitutes the basis for understanding information transfer between molecules in living systems as well as in synthetic supramolecular structures.
FILIPPI, Antonello +3 more
openaire +2 more sources
Abstract Determination of the intrinsic noncovalent interactions governing chiral recognition in diastereomeric complexes constitutes the basis for understanding information transfer between molecules in living systems as well as in synthetic supramolecular structures.
FILIPPI, Antonello +3 more
openaire +2 more sources
Enantioselective Synthesis of (−)-Pentalenene
Organic Letters, 2007A short, enantioselective synthesis of (-)-pentalenene is described. Catalytic enantioselective cyclopropenation with (R,R)-Rh2(OAc)(DPTI)3 was used to set the absolute stereochemistry, and an intramolecular Pauson-Khand reaction of the resulting cyclopropenyne was used to establish the quaternary center.
Mahesh K, Pallerla, Joseph M, Fox
openaire +2 more sources
Enantioselective cooperative catalysis
Organic & Biomolecular Chemistry, 2015This review focuses on enantioselective cooperative catalytic reactions, wherein two catalysts work simultaneously to form products which cannot be obtained by the use of a single catalyst alone, which have attracted considerable attention in recent years.
Suleman M, Inamdar +2 more
openaire +2 more sources
Enantioselective Synthesis of Renieramide.
ChemInform, 2004A highly chemo- and enantioselective PTC alkylation has been developed that allows rapid access to orthogonally protected (S,S)-isodityrosine. Utility of this material in the construction of isodityrosine-containing cyclic peptides is demonstrated by synthesis of the natural product renieramide.
Barry Lygo, Luke Humphreys
openaire +1 more source
Enantioselective Synthesis of (+)-Peganumine A
Journal of the American Chemical Society, 2016A gram-scale enantioselective total synthesis of (+)-peganumine A was accomplished in 7 steps from commercially available 6-methoxytryptamine. Key steps included (a) a Liebeskind-Srogl cross-coupling; (b) a one-pot construction of the tetracyclic skeleton from an ω-isocyano-γ-oxo-aldehyde via a sequence of an unprecedented C-C bond forming ...
Piemontesi C, Wang Q, Zhu J
openaire +3 more sources
Enantioselective Synthesis of Silanol
Journal of the American Chemical Society, 2008An enantioselective nucleophilic substitution reaction of achiral dialkoxysilane has been developed. The reaction proceeds with efficient stereocontrol on the silicon chirality center to give the enantioenriched silyl ether, which can be converted to the silanol without loss of enantiopurity.
Kazunobu, Igawa +3 more
openaire +2 more sources
Enantioselective Synthesis of Silacyclopentanes
Angewandte Chemie, 2016AbstractA variety of functionalized silacyclopentanes were synthesized by highly enantioselective β‐eliminations of silacyclopentene oxides followed by stereospecific transformations. The reaction mechanism of the β‐elimination was elucidated by DFT calculations.
Kazunobu Igawa +3 more
openaire +2 more sources
Enantioselective Dihalogenation of Alkenes
Chemistry – A European Journal, 2021AbstractThe dihalogenation of alkenes is one of the classic reactions in organic chemistry and a prime example of an electrophilic addition reaction. The often observed anti‐selectivity in this addition reaction can be explained by the formation of a haliranium‐ion intermediate.
Jonathan Bock +3 more
openaire +2 more sources
An Enantioselective Synthesis of Voriconazole
The Journal of Organic Chemistry, 2013A new seven-step sequence to access voriconazole, a clinically used antifungal agent, was developed. The initial catalytic asymmetric cyanosilylation is the key to constructing the consecutive tetra- and trisubstituted stereogenic centers. The fluoropyrimidine unit frequently triggered unexpected side reactions, but careful amendment of the reaction ...
Keiji, Tamura +3 more
openaire +2 more sources
Enantioselective Hydrogenation of Isoquinolines
Angewandte Chemie International Edition, 2013Asymmetric hydrogenation of (hetero)arenes is one of the most straightforward ways to synthesize enantiomerically pure, saturated or partially saturated cyclic molecules. Recent progress has significantly expanded the substrate scope of this reaction.
Dongbing, Zhao, Frank, Glorius
openaire +2 more sources