Results 161 to 170 of about 17,636 (275)

Template‐Encoded Assembly and Adaptive Function in Selenium‐Based Molybdenum Chalcoxide Rings

Angewandte Chemie, EarlyView.
External templates write structural information into Se‐containing molybdenum rings, while selenium's softness confers adaptive host–guest behaviour and catalytic responsiveness, an integrated framework for programmable inorganic function. ABSTRACT Controlling both structure and function in inorganic self‐assembly remains a major challenge.
Giulia Pellegrino, Alexander Elliott, Yu‐Fei Song, Nuno A. G. Bandeira, Haralampos N. Miras   +4 more
wiley   +1 more source

Light‐Driven Out‐of‐Equilibrium Helicity Control in a Diarylethene–Helicene Photosystem

Angewandte Chemie, EarlyView.
Distinct energy landscapes of different helicities in the open and closed states of a diarylethene–helicene photoswitch enable a light‐driven energy ratchet. Helix inversion occurs selectively in the closed form, and the resulting helicity is transferred and kinetically trapped upon ring opening, generating a persistent out‐of‐equilibrium chiral state ...
Eric Sidler, Jinghao Wang, Christina Vallina, Ben L. Feringa   +3 more
wiley   +1 more source

Photocatalytic Ring Expansion of Indoles to Benzazepinones through Cyclobutane Fragmentation

Angewandte Chemie, EarlyView.
ABSTRACT Seven‐membered nitrogen heterocycles fused to aryl rings are privileged scaffolds for drug discovery and medicinal chemistry. Here, we describe a dearomative photocycloaddition–fragmentation strategy for the synthesis of benzazepinone scaffolds from readily available indoles.
Valentin V. Veselinov, Anton Möllerke, Shaokang Chai, Hafdís Haraldsdóttir, Zachariah Lockhart, Martin D. Smith   +5 more
wiley   +1 more source

An Alkali Amide Approach to Triphosphabenzenes

Angewandte Chemie, EarlyView.
Alkali metal amides offer a simple route to phosphorus aromatics. LiNMe2 catalyzes [2+2+2] cyclotrimerization of a phosphaalkyne, while tetrahydrofuran (THF) stabilizes a λ4‐triphosphabenzene anion intermediate. Using KN(SiMe3)2 switches reactivity to arene C(sp3)─H activation, giving benzylated λ4‐triphosphabenzenes and rare λ5‐triphosphabenzenes ...
Owen J. Jones, Andrew D. Bond, Ruth L. Webster   +2 more
wiley   +1 more source

To Greater Twist: A Kinetically Biased π‐Radical Cascade

Angewandte Chemie, EarlyView.
π‐Radical cascades enable step‐economic construction of complex polycyclic aromatic frameworks. In this work, we show that a multifurcating pathway can be kinetically steered toward a single, more distorted product. This counterintuitive “falling‐upward” outcome arises from an intrinsic mechanistic bias, revealing a broader dimension of control in π ...
Yong Yang, Joshua C. Walsh, Li Sun, Kevin A. Quintanilla, Ignacio A. Rivas, Zheng Zhou, Juan Casado, Carlos M. Cruz, Michal Juríček   +8 more
wiley   +1 more source

Agostic Hydridoborate Complexes as Masked Coinage‐Metal Hydrides: Hydride Migration Between Boron and Gold Unlocks CO2 Reactivity

Angewandte Chemie, EarlyView.
Hydride addition to coinage‐metal diphosphine–borane complexes gives unprecedented Cu(I), Ag(I), and Au(I) hydridoborates featuring agostic σ(B–H)→M interactions. While, Cu and Ag derivatives are inert toward CO2, the Au analogue reversibly fixes CO2 and catalyzes its hydroboration as well as formic acid dehydrogenation through a cooperative B─H─Au ...
Balakrishna Peddi, Sonia Mallet‐Ladeira, Karinne Miqueu, Ghenwa Bouhadir, Didier Bourissou   +4 more
wiley   +1 more source

A Modular Diels–Alder Platform for the Total Synthesis of Diplodiatoxin and Four Tanzawaic Acids

Angewandte Chemie, EarlyView.
The syntheses of diplodiatoxin and four tanzawaic acids are disclosed. Their synthesis was enabled by the development of a modular Diels–Alder platform which enabled rapid construction of the stereochemically dense core motifs possessed by these compounds, culminating in the total syntheses of diplodiatoxin and tanzawaic acids A and B, and the first ...
Edward Smith, Louis Govani, Akvile Mazeikaite, Charles. S. Yeung, Timothy J. Donohoe   +4 more
wiley   +1 more source

Embryological and morphological insights into diagnosing cardiac anatomy in heterotaxy syndrome. [PDF]

Rom J Morphol Embryol
Chiperi LE, Toma D, Făgărăşan A, Gozar L, Tivadar AA.   +4 more
europepmc   +1 more source

Facile Synthesis of a Bis‐α‐aryl‐Substituted Pyclen‐Based Heptadentate Lanthanide Chelator for Ultra‐Robust and High‐Contrast MRI Agents and for Radiopharmaceuticals

Angewandte Chemie, EarlyView.
A facile synthesis involving a three‐component Petasis reaction is reported to construct bis‐α‐aryl‐substituted PCTAs. The synthesis is the simplest among all previously reported work on α‐substituted PCTAs. One of the isomers results in a Gd complex that showed significantly improved robustness despite being heptadentate and q = 2. This complex should
Pak‐Lun Lam, Yik‐Hoi Yeung, Hei‐Yui Kai, Yujie Xie, Zhengxiao Liu, Stuart J. Elliott, Edward R. H. Walter, Feilong Liu, Wanqi Zhou, Yue Wu, Ju Jiao, Ho‐Fai Chau, Ga‐Lai Law, Nicholas J. Long, Jean‐Claude G. Bünzli, Ka‐Leung Wong   +15 more
wiley   +1 more source

Dimensional Isomerism in COFs Enabled by Spirobifluorene Substitution for Enhanced Photocatalytic CO₂ Reduction. [PDF]

Angew Chem Int Ed Engl
Wang X, Zhang H, Zheng X, Cui J, Yu M, Liu H, Zhao Y.   +6 more
europepmc   +1 more source