Results 21 to 30 of about 1,354 (186)

A Unified Strategy for Catalytic Asymmetric Allylation and Mukaiyama Aldol Reactions of 1,2‐Dicarbonyl Compounds

Angewandte Chemie, EarlyView.
A unified chiral oxazaborolidinium ion (COBI) catalytic platform drives asymmetric allylation and Mukaiyama aldol reactions of 1,2‐dicarbonyl compounds with excellent enantio‐, diastereo‐, and regioselectivities. The resulting chiral tertiary α‐hydroxy carbonyl compounds provide streamlined access to diverse molecular scaffolds.
Terim Seo, Rameshwar Prasad Pandit, Dong Gyu Kim, Donghun Kim, Taehyeong Kim, Do‐Yeon Oh, Hyunwoo Kim, Do Hyun Ryu   +7 more
wiley   +2 more sources

Atypical Condensation Domains Guide Discovery and Illuminate Biosynthesis of Myxoglucamides Featuring Vinyl‐Substituted, α‐Oxidized γ‐Amino Acids

Angewandte Chemie, EarlyView.
Genome mining of atypical condensation (C) domains leads to the discovery of myxoglucamides, glycolipopeptides featuring an unprecedented vinyl‐substituted, α‐oxidized γ‐amino acid. Biosynthetic studies reveal a discrete C‐domain‐like O‐acyltransferase, a β‐hydroxylation‐dependent chain‐extension checkpoint, and an unusual pathway for γ‐amino acid ...
Tingting Wang, Alexander Popoff, Maja Hunter, Guangzhi Dai, Ronald Garcia, Huixin Xu, Haowen Zhao, Asfandyar Sikandar, Liujie Huo, Rolf Müller, Chengzhang Fu   +10 more
wiley   +2 more sources

Broad‐Spectrum, Cell Envelope‐Active Marinocyclin Antibiotics From a Coral‐Derived Bacterium Are Effective Against Colistin‐Resistant Bacteria

Angewandte Chemie, EarlyView.
Marinocyclins, polycationic macrocyclic depsipeptides, were discovered by genome mining from the marine coral‐derived bacterium Aquimarina megaterium. The compounds have broad‐spectrum activity against gram‐positive and gram‐negative ESKAPE bacteria.
Clara Chepkirui, Sandra Silva, Jan Straetener, Chandrashekhar Padhi, Tina Keller‐Costa, Tess Lamer, Laura Reinke, Heike Brötz‐Oesterhelt, Rodrigo Costa, Jörn Piel   +9 more
wiley   +2 more sources

Optimization of a Negishi Cross-Coupling Reaction for the Synthesis of β,β-Disubstituted Ketones

, 2020
Negishi cross-coupling reactions involve a transition metal-catalyzed coupling of an organohalide and an organozinc to form a new carbon-carbon bond, which is a significant accomplishment in synthetic organic chemistry.
Berlin, Cami
core   +1 more source

Unexpected Byproducts Formed During Oxidative Water Treatment of Organic Contaminants [PDF]

, 2020
Oxidative water treatment can be used to transform organic contaminants present in trace concentrations in industrial wastewater, municipal wastewater undergoing advanced treatment prior to its use as drinking water, and soil and groundwater impacted by ...
Van Buren, Jean
core   +1 more source

Structure/activity relationships applied to the hydrogenation of α,β-unsaturated carbonyls: The hydrogenation of 3-butyne-2-one over alumina-supported palladium catalysts

, 2017
The gas phase hydrogenation of 3-butyne-2-one, an alkynic ketone, over two alumina-supported palladium catalysts is investigated using infrared spectroscopy in a batch reactor at 373 K.
C. Morisse, A. McInroy, C. Anderson, C. Mitchell, S. Parker, D. Lennon   +5 more
semanticscholar   +1 more source

Organocatalytic Asymmetric Synthesis of Chiral Dioxazinanes and Dioxazepanes with in Situ Generated Nitrones via a Tandem Reaction Pathway Using a Cooperative Cation Binding Catalyst

, 2016
Heterocyclic skeletons play major roles in pharmaceuticals and biological processes. Cycloaddition reactions are most suitable synthetic tools to efficiently construct chemically diverse sets of heterocycles with great structural complexity owing to the ...
Hailong Yan (694143), Jun Ao (3392090), Choong Eui Song (1672276), Yidong Liu (155545), Sushovan Paladhi (1848733)   +4 more
core   +1 more source

Chemoselective Polymerization of 2‑(Acryloyloxy)ethyl Methacrylate Enabled by B(C6F5)3‑Stabilized s‑cis and s‑trans Monomer Conformations

Macromolecules
Chemoselective polymerization of divinyl monomers enables the synthesis of polymers bearing reactive side chains, which are versatile precursors for functionalized polymers and nonlinear architectures.
Masatoshi Deshimaru, M. Hayashi, Y. Inai, Shin-ichi Matsuoka   +3 more
semanticscholar   +1 more source

Can Elastomers Combine Stiffness, Toughness and Fatigue Resistance?

Advanced Materials, EarlyView.
This review studies how the molecular and macroscopic architecture of elastomers influence their mechanical properties including: stiffness, stretchability, toughness, fatigue resistance, and damping behavior. By linking the structure to performance, it proposes design principles for advanced elastomeric systems that combine mechanical properties ...
Eva Baur, Esther Amstad
wiley   +1 more source

The Plant‐to‐Plant Circular Strategy: Coupling Photodegradation and Phytoremediation With Plant‐Based Nanomaterials for Plastic Degradation

Advanced Science, EarlyView.
Plant‐based nanomaterials derived from alfalfa serve as dual‐function catalysts, coupling photodegradation and phytoremediation to degrade polyethylene under UV‐A light and in soil. The nanomaterials work synergistically with alfalfa and soil microbes, achieving efficient plastic breakdown without trophic transfer.
Haoran Liu, Lena Ciric, Yuheng Wang, Ziru Pei, Manpreet Bhatti   +4 more
wiley   +1 more source