469912-65-0Relevant academic research and scientific papers
Evolution of N-Heterocycle-Substituted Iodoarenes (NHIAs) to Efficient Organocatalysts in Iodine(I/III)-Mediated Oxidative Transformations
Boelke, Andreas,Nachtsheim, Boris J.
supporting information, p. 184 - 191 (2019/12/11)
The reactivity of ortho-functionalized N-heterocycle-substituted iodoarenes (NHIAs) as organocatalysts in iodine(I/III)-mediated oxidations was systematically investigated in the α-tosyloxylation of ketones as the model reaction. During a systematic catalyst evolution, it was found that NH-triazoles and benzoxazoles have the most significant positive influence on the reactivity of the central iodine atom. A further catalyst improvement which focused on the substitution pattern of the arene revealed a remarkable ortho-effect. By introduction of an o-OMe group we were able to generate a novel NHIA with a so far unseen catalytic efficiency. This new catalyst is not only easy to synthesize but also enabled the α-tosyloxylation of carbonyl compounds at the lowest reported catalyst loading of only 1 mol%. Finally, the performance of this iodine(I) catalyst was successfully demonstrated in intramolecular oxidative couplings of biphenyls and oxidative rearrangements. (Figure presented.).
Iodolopyrazolium Salts: Synthesis, Derivatizations, and Applications
Boelke, Andreas,Caspers, Lucien D.,Kuczmera, Thomas J.,Lork, Enno,Nachtsheim, Boris J.
supporting information, p. 7261 - 7266 (2020/10/05)
The synthesis of iodolopyrazolium triflates via an oxidative cyclization of 3-(2-iodophenyl)-1H-pyrazoles is described. The reaction is characterized by a broad substrate scope, and various applications of these novel cyclic iodolium salts acting as useful synthetic intermediates are demonstrated, in particular in site-selective ring openings. This was finally applied to generate derivatives of the anti-inflammatory drug celecoxib. Their application as highly active halogen-bond donors is shown as well.
SPIROCYCLIC HAT INHIBITORS AND METHODS FOR THEIR USE
-
, (2016/04/10)
Compounds having a structure of Formula (IX) or a stereoisomer, tautomer or pharmaceutically acceptable salt thereof, wherein R1, R2a, R2b, R3a, R3b, R4a, R4b, Q1----Q2, R6, R7, A, B, W, x, and y are as defined herein and are provided. Pharmaceutical compositions comprising such compounds and methods for treating various HAT-related conditions or diseases, including cancer, by administration of such compounds are also provided.
Functionalization of 3-chlorobenzaldehyde
Aksjonova, Kristine,Belyakov, Sergey,Liepinsh, Edvards,Boman, Arne,Lundstedt, Torbjorn,Lek, Per,Trapencieris, Peteris
, p. 2200 - 2208 (2012/09/22)
2-Substituted 3-chlorobenzaldehydes were prepared from the corresponding 2-(3-chlorophenyl)-1,3-dioxolanes using an ortho-lithiation strategy. The 6-chloro-2-formylbenzamide exists only in a ring form, but 6-chloro-2- formylbenzoic acid esters were isolated in both forms as open chain and cyclic tautomers. 7-Chloro-3-hydroxy-3H-isobenzofuran-1-one reacted with nucleophilic reagents at the carbonyl or quaternary carbon depending on the character of nucleophile. Georg Thieme Verlag Stuttgart New York.
