Visible‐Light Promoted Intramolecular para‐Cycloadditions on Simple Aromatics

Dearomative cycloadditions are a powerful tool to access a large chemical space exploiting simple and ubiquitous building blocks. The energetic burden due to the loss of aromaticity has however greatly limited their synthetic potential. We devised a general intramolecular method that overcomes these limitations thanks to the photosensitation of allenamides....

16h

Electronically Ambivalent Hydrodefluorination of Aryl‐CF3 groups enabled by Electrochemical Deep‐Reduction on a Ni Cathode

The Ar-CF2H moiety is featured in an increasing number of bioactive compounds due to its unique combination of properties. The hydrodefluorination of Ar-CF3 compounds is a direct and efficient route toward this motif. As reported methods for this transformation have focused on specific substrate families, herein we describe a general—electronically...

16h

Sr(Ag1‐xLix)2Se2 and [Sr3Se2][(Ag1‐xLix)2Se2] Tunable Direct Band Gap Semiconductors

Synthesizing solids in molten fluxes enables the rapid diffusion of soluble species at temperatures lower than in solid-state reactions, leading to crystal formation of kinetically stable compounds. In this study, we demonstrate the effectiveness of mixed hydroxide and halide fluxes in synthesizing complex Sr/Ag/Se in mixed LiOH/LiCl. We have accessed...

16h

A Covalent Organic Framework as a Long‐life and High‐Rate Anode Suitable for Both Aqueous Acidic and Alkaline Batteries

Aqueous rechargeable batteries are prospective candidates for large-scale grid energy storage. However, traditional anode materials applied lack acid-alkali co-tolerance. Herein, we report a covalent organic framework containing pyrazine (C=N) and phenylimino (-NH-) groups (HPP-COF) as a long-cycle and high-rate anode for both acidic and alkaline batteries....

16h

Perfluoroalkyl Selenoxides, Selenones and Selenoximines: General Preparation and Properties

A selective access to perfluoroalkyl selenoxides, via Oxone® as oxidant or to selenones by using a Polyoxometalate-based Ionic Liquid (POM-IL) as a catalyst for the oxidation step is described. The reaction works with various perfluoralkyl chains and substituents with satisfactory to excellent yields. A two-step one-pot reaction from selenocyanates...

16h

Nanoconfinement‐Guided Construction of Nanozymes for Determining H2O2 Produced by Sonication

Nanomaterials with enzyme-like activities, termed as nanozymes, have found wide applications in various fields. It has been a long-term aim to rationally design and synthesize highly active nanozymes and thus to further improve their application performance. Guided by the nanoconfinement effect, we confine cytochrome c (Cyt c) within a mesoporous metal–organic...

16h

Discovery of a Unique Flavonoid Biosynthesis Mechanism in Fungi by Genome Mining

Flavonoids are important plant natural products with variable structures and bioactivities. All known plant flavonoids are generated under the catalysis of type III PKS followed by chalcone isomerase (CHI) and flavone synthase (FNS). Here, the biosynthetic gene cluster of chlorflavonin, a fungal flavonoid with acetolactate synthase inhibitory activity,...

1d

Development of a General and Selective Nanostructured Cobalt Catalyst for the Hydrogenation of Benzofurans, Indoles and Benzothiophenes

Pyrolysis of Co-DABCO-citric acid template on silica resulted in stable and reusable Co/Co3O4 core–shell nanostructured catalyst which allows for the selective hydrogenation of benzofurans as well as indoles and benzothiophenes. Abstract The selective hydrogenation of benzofurans in the presence of a heterogeneous non-noble metal catalyst is reported....

1d

Grenzflächen mit fluorierten Amphiphilen: Überstrukturen und Mikrofluidik

Fluorierte Amphiphile zeigen Grenzflächeneigenschaften, die sich deutlich von denen gewöhnlicher nichtfluorierter Amphiphile unterscheiden, wie einzigartige, stark verzweigte Überstrukturen und eine bessere Stabilisierung von Mikrotröpfchen. Weitere fluorspezifische Phänomene fluorierter Amphiphile können an Fest/Flüssig-Grenzflächen beobachtet werden,...

1d

Deciphering the Biological Activities of Antifungal Agents with Chemical Probes

The rising percentage of fungal pathogens resistant to antifungal drugs and fungicides emphasizes the threat that they pose to animal and human health and global food security. This Minireview outlines the pivotal role of chemical biology in uncovering biological activities, detecting resistance, and in characterizing the interactions between antifungal...

1d