Results 121 to 130 of about 27,695 (265)
Angewandte Chemie, EarlyView.A metal‐free photocatalytic platform converts nitrones into 4‐isoxazolines and oxa–aza–bicycloheptanes through divergent [3+2π/σ] cycloadditions. Assembly‐controlled kinetic electron transfer gating dictates substrate activation, enabling selective reactivity beyond thermodynamic expectations.
Nayan Saha +6 more
wiley +2 more sources
Heterocycle-functionalized luminogens exhibiting aggregation-induced emission
, 2015 The development of a series of fluorescent materials including heterocycle-functionalized luminogens with aggregation-induced/enhanced emission (AIE/AEE), long wavelength emission, and high solid state fluorescence quantum efficiency is contemplated. The
Liu, Bin +6 more
core
Angewandte Chemie, EarlyView.By employing a sterically bulky monocoordinate bismuthinidene, the synthesis and characterization of the first examples of an unsupported iminobismuthane and tetraazabismole was achieved via reactions with organic azides. The corresponding amines could be accessed by reduction, leading to the regeneration of the Bi(I) compound. Hence, we also highlight
Marcel Potocnik +9 more
wiley +2 more sources
A Mesoionic Platform for Persistent Anionic Nitrogen‐Centered Radicals
Angewandte Chemie, EarlyView.Charge did not meet spin: Mesoionic 1,2,3‐triazines undergo reversible one‐electron reduction to persistent anionic nitrogen‐centered radicals. Electron paramagnetic resonance, single‐crystal x‐ray diffraction, and calculations reveal nitrogen‐localized spin and structural reorganization, while crystalline salts show clean redox cycling.
Deepak Ranolia +8 more
wiley +2 more sources
The Synthesis of the first six-membered true heterocycle
, 2001 The synthesis and X-Ray structure of the first six membered non-ionic genuine heterocycle is reported. The non-planar ring is formed by Cu, O, C, N, P, and 5 and its conformation is described as pseudo boat.
Slawin, Alexandra Martha Zoya +2 more
core +2 more sources
, 2007 The methylene-linked bis{guanidine}, H2C{hpp}2 (hppH = 1,3,4,6,7,8-hexahydro-2H-pyrimido[1,2-a]pyrimidine), displays nucleophilic activity towards organic halides, including the activation of dichloromethane under ambient conditions to afford the ...
Steven Lee (72507) +5 more
core
Ru-catalysed synthesis of fused heterocycle-pyridinones and -pyrones
, 2017 The synthesis of fused heterocycle-pyridinones has been achieved by oxidative coupling of N-unprotected primary heterocycle-amides with internal alkynes.
Ruiz Morte, Sara +7 more
core +1 more source
Cobalt‐Catalyzed C─N Bond Formation via Metal‐Hydride Hydrogen Atom Transfer (MHAT)
Angewandte Chemie, EarlyView.Cobalt‐catalyzed metal‐hydride hydrogen atom transfer (Co‐MHAT) converts simple alkenes into C─N bonds under mild, near‐neutral conditions. A shared Co─H‐initiated radical/organocobalt intermediate is channeled into radical trapping, radical‐polar crossover, or radical ligand transfer, unifying hydroamination, hydroazidation, hydroamidation, and remote
Arman Khosravi, Ming‐Yu Ngai
wiley +2 more sources
Generalizable Strategies for the Synthesis of Cereblon‐Recruiting PROTAC Prodrugs
Angewandte Chemie, EarlyView.Cereblon‐recruiting PROTACs remain challenging to derivatize for prodrug‐based delivery. In this study, three complementary conjugation strategies enabled the efficient synthesis of cleavable PROTAC prodrugs with tunable release kinetics that can be incorporated into a library of PEGylated constructs and bottlebrush prodrugs.
Aiden X. Wang +7 more
wiley +2 more sources
Isothiazologuanosine (tzG) as Environmentally Sensitive Fluorescent Reporter in RNA
Angewandte Chemie, EarlyView.The emissive isothiazologuanosine analog tzG is synthesized for the first time as RNA phosphoramidite building block for solid‐phase synthesis. Due to its isomorphic and isofunctional characteristics, tzG forms Watson–Crick base pairs and can be used as fluorescent probe to monitor (deoxy)ribozyme activity.
Julia Dietzsch +2 more
wiley +2 more sources