Results 1 to 10 of about 14,620 (168)

Protecting Groups in Carbohydrate Chemistry: Influence on Stereoselectivity of Glycosylations

Molecules, 2010
Saccharides are polyhydroxy compounds, and their synthesis requires complex protecting group manipulations. Protecting groups are usually used to temporarily mask a functional group which may interfere with a certain reaction, but protecting groups in ...
Xin-Shan Ye
exaly   +3 more sources

Asymmetric Henry Reaction Using Cobalt Complexes with Bisoxazoline Ligands Bearing Two Fluorous Tags

Molecules, 2023
The effect of the presence of fluorous tags in bisoxazoline ligands on the stereoselectivity of the cobalt-catalyzed asymmetric Henry reaction was investigated.
Kazuki Ishihara, Yamato Kato, Narisa Takeuchi, Yuka Hayashi, Yuna Hagiwara, Shyota Shibuya, Tohya Natsume, Masato Matsugi   +7 more
doaj   +1 more source

Stereoselectivity in the Membrane Transport of Phenylethylamine Derivatives by Human Monoamine Transporters and Organic Cation Transporters 1, 2, and 3

Biomolecules, 2022
Stereoselectivity is well known and very pronounced in drug metabolism and receptor binding. However, much less is known about stereoselectivity in drug membrane transport. Here, we characterized the stereoselective cell uptake of chiral phenylethylamine
Lukas Gebauer, Muhammad Rafehi, Jürgen Brockmöller   +2 more
doaj   +1 more source

Stereoselective Synthesis of (−)-Spicigerolide [PDF]

The Journal of Organic Chemistry, 2009
(-)-Spicigerolide was stereoselectively synthesized from a protected (S)-lactaldehyde. The synthesis of the polyacetylated framework relied on two Zn-mediated stereoselective additions of alkynes to aldehydes as well as a regiocontrolled [3,3]-sigmatropic rearrangement of an allylic acetate.
Georges, Yohan, Ariza Piquer, Xavier, García Gómez, Jordi   +2 more
openaire   +4 more sources

A Stereoselective Synthesis of (−)-Tetrodotoxin [PDF]

Journal of the American Chemical Society, 2003
An asymmetric synthesis of the fugu fish poison, (-)-tetrodotoxin, is described. The route to this extraordinary target employs a number of unique transformations, foremost of which are two stereospecific C-H bond functionalization reactions. Accordingly, Rh-catalyzed carbene and nitrene C-H insertions facilitate rapid entry to the cyclohexane core of ...
Andrew, Hinman, J, Du Bois
openaire   +2 more sources

Stereoselective Synthesis of Microcarpalide. [PDF]

ChemInform, 2002
AbstractFor Abstract see ChemInform Abstract in Full Text.
Juan, Murga, Eva, Falomir, Jorge, García-Fortanet, Miguel, Carda, J Alberto, Marco   +4 more
openaire   +2 more sources

Aromatic C–H bond functionalization through organocatalyzed asymmetric intermolecular aza-Friedel–Crafts reaction: a recent update

Beilstein Journal of Organic Chemistry, 2023
The aza-Friedel–Crafts reaction allows an efficient coupling of electron-rich aromatic systems with imines for the facile incorporation of aminoalkyl groups into the aromatic ring. This reaction has a great scope of forming aza-stereocenters which can be
Anup Biswas
doaj   +1 more source

Stereoselective Toxicokinetic and Distribution Study on the Hexaconazole Enantiomers in Mice

Toxics, 2023
Hexaconazole (Hex) has been widely used in agricultural products, and its residues may pose a potential risk to human health. However, the metabolic behavior of Hex enantiomers in mammal organisms is still unknown, which is important for evaluating the ...
Guofei Luo, Junxiao Pang, Dali Sun, Qinghai Zhang   +3 more
doaj   +1 more source

Synthesis of Polysubstituted Ferrocenesulfoxides

Molecules, 2022
The purpose of the study is to design synthetic methodologies, especially directed deprotometalation using polar organometallic reagents, to access polysubstituted ferrocenesulfoxides.
Min Wen, William Erb, Florence Mongin, Yury S. Halauko, Oleg A. Ivashkevich, Vadim E. Matulis, Thierry Roisnel   +6 more
doaj   +1 more source

Tetrahydropyridines’ Stereoselective Formation, How Lockdown Assisted in the Identification of the Features of Its Mechanism

Molecules, 2022
The multicomponent reaction of aldehydes, cyano-containing C-H acids, esters of 3-oxocarboxylic acid and ammonium acetate led to unexpected results.
Anatoly N. Vereshchagin, Taigib M. Iliyasov, Kirill A. Karpenko, Radmir N. Akchurin, Mikhail E. Minyaev   +4 more
doaj   +1 more source