Results 21 to 30 of about 17,602 (278)
Isoselenazole Synthesis by Rh-Catalyzed Direct Annulation of Benzimidates with Sodium Selenite
Chemistry, 2023 Organoselenium compounds have attracted significant research interest because of their potent therapeutic activities and indispensable applications in the organic chemistry field.
Qing-Feng Xu-Xu +2 more
doaj +1 more source
Annulling an Annulled Annular Pancreas: A Case Report
Nepal Mediciti Medical Journal, 2023 Annular Pancreas (AP) is a rare congenital developmental anomaly which results from failure of the ventral bud to rotate to fuse with the dorsal bud, resulting in a ring of pancreatic parenchyma that surrounds the second portion of the duodenum. This rare entity can be partial or complete and the partial is even rarer.
Subodh Ghimire +4 more
openaire +1 more source
Catalytic σ-Bond Annulation with Ambiphilic Organohalides Enabled by β-X Elimination
, 2023 We describe a catalytic cascade sequence involving directed C(sp3)–H activation followed by β-heteroatom elimination to generate a PdII(π-alkene) intermediate that then undergoes redox-neutral annulation with an ambiphilic aryl halide to access 5- and 6 ...
Jing-Cheng, Dai +6 more
core +1 more source
Nature Communications, 2018 Dehydrogenative annulation is a valuable approach to heterocycles, however, stoichiometric oxidants are often required. Here, the authors describe the electrochemical dehydrogenative annulation of diols and alkenes to generate dioxanes and dioxepanes ...
Chen-Yan Cai, Hai-Chao Xu
doaj +1 more source
Sustainable, Oxidative, and Metal-Free Annulation
, 2020 Annulation has received steadily growing interest in the interplay with the increasing emphasis towards selective C−H bond functionalization reactions. Metal-free oxidative annulation through functionalization of inert and abundant C−H bonds offers great
Bering L., Manna S., Antonchick A.P.
core +2 more sources
Fused Imidazopyrazoles: Synthetic Strategies and Medicinal Applications
Journal of Chemistry, 2014 The current review summarizes the known synthetic routes of fused imidazopyrazoles. This review is classified into two main categories based on the type of annulations, for example, annulation of the imidazole ring onto a pyrazole scaffold or annulation ...
Rizk E. Khidre +2 more
doaj +1 more source
Fused-Ring Oxazolopyrrolopyridopyrimidine Systems with Gram-Negative Activity
Antibiotics, 2017 Fused polyheterocyclic derivatives are available by annulation of a tetramate scaffold, and been shown to have antibacterial activity against a Gram-negative, but not a Gram-positive, bacterial strain.
Yiyuan Chen +3 more
doaj +1 more source
A New Route to Annulated Oligothiophenes. [PDF]
ChemInform, 2004 AbstractFor Abstract see ChemInform Abstract in Full Text.
Valentine G, Nenajdenko +3 more
openaire +2 more sources
A Nonbenzenoid Nanographene Horse Saddle With Four Pentagon–Octagon Pairs
Angewandte Chemie, EarlyView.Horse‐saddle molecule: We report herein the design and synthesis of an unprecedented saddle‐shaped non‐benzenoid Nanographene featuring a fused four‐pair pentagon–octagon core. The horse‐saddle structure of HN1 is determined by single‐crystal X‐ray diffraction.
Qiang Huang +11 more
wiley +2 more sources
, 1978 FONCTIONNAIRES ET AGENTS PUBLICS / Annulation d'un licenciement / Annulation du refus de réintégration / Procédure / Exécution des jugements . In: Revue Judiciaire de l'Ouest, 1978-1. pp.
core +2 more sources