Results 71 to 80 of about 27,319 (289)
Chiral Recognition of Flexible Melatonin Receptor Ligands Induced by Conformational Equilibria
Molecules, 2020 N-anilinoethylamides are a class of melatoninergic agents with the aniline portion mimicking the indole ring of the natural ligand and the ethylamide chain reproducing that of melatonin.
Gian Marco Elisi +9 more
doaj +1 more source
Advanced Science, EarlyView.We developed a series of quinoxalinoquinoxaline (QQ) photosensitizers featuring high and tunable excited‐state reduction potentials (E(PC•+/PC*) = –1.76 to –2.05 V vs. SCE). Their hydrogen‐bonding interaction with carbonyl substrates enables selective single‐electron transfer events for selective nitrilization of 1° amides, offering a tunable ...
Seongwoo Bae, Dongwook Kim, Jinwoo Kim
wiley +1 more source
Angewandte Chemie, EarlyView.An enantioselective rhodium‐catalyzed [2 + 2 + 2] cycloaddition enables the synthesis of axially chiral diaryl ethers. Carbonyl coordination ensures high reactivity and regioselectivity, affording products bearing up to four stereogenic axes with good enantio‐ and diastereoselectivity.
Yu Sato +3 more
wiley +2 more sources
, 2016 A study of the intermolecular Michael addition of certain benzothiazine anions demonstrated that stereoselectivity could be extremely high, though achieving control over the direction of relative stereoselectivity was in general not ...
Charles L. Barnes (774654) +2 more
core +5 more sources
Advanced Science, EarlyView.A stimuli‐responsive supramolecular system has been rationally designed enabling hierarchical control over supramolecular handedness. This hybrid architecture retains orthogonal host‐guest properties and displays unique amphiphilicity‐directed chiral self‐assembly.
Minzan Zuo +8 more
wiley +1 more source
Asymmetric Iron‐Catalyzed Vicinal C(sp3)─H Diamination of Carboxylic Acids
Angewandte Chemie, EarlyView.An iron‐catalyzed vicinal α,β‐C(sp3)─H diamination of readily available carboxylic acids furnishes chiral α,β‐diamino acids in a single pot with high regio‐, diastereo‐, and enantioselectivity (up to >20:1 dr and >99% ee). ABSTRACT The direct construction of chiral 1,2‐diamines through the stereoselective functionalization of two vicinal C(sp3)─H bonds
Bing Zhou +5 more
wiley +2 more sources
ProceedingsThis study proposes a two-step process to design a chiral sensor combining MIP (molecularly imprinted polymer) and electrospinning technologies. First, stereoselective S(-)-limonene molecularly imprinted polymer nanoparticles (MINPs) were fabricated and ...
Fabricio N. Molinari +2 more
doaj +1 more source
Electrophilic Selenium Catalysis with Electrophilic N-F Reagents as the Oxidants
Molecules, 2017 A suitable oxidative system is crucial to electrophilic selenium catalysis (ESC). This short review offers the overview of recent development in ESC with electrophilic N-F reagents as the oxidants. Several highly selective transformations of alkenes such
Ruizhi Guo, Lihao Liao, Xiaodan Zhao
doaj +1 more source
Recent Advances in the Stereoselective Total Synthesis of Natural Pyranones Having Long Side Chains
Molecules, 2020 Pyranone natural products have attracted great attention in recent years from chemists and biologists due to their fascinating stereoisomeric structural features and impressive bioactivities.
Satya Kumar Avula +4 more
doaj +1 more source
Probing stereoselectivity with carbohydrates [PDF]
, 1993 This thesis describes the use of carbohydrates to probe the effects of oxygenated substituents on the stereoselectivity of free radical and osmium tetroxide dihydroxylation reactions.
Gajee, Roohi
core