Intramolecular Aryl Migration of Diaryliodonium Salts: Access to <i>ortho</i>
-Iodo Diaryl Ethers
作者:Huangguan Chen、Jianwei Han、Limin Wang
DOI:10.1002/anie.201806405
日期:2018.9.17
developed for the synthesis of ortho‐iodo diaryl ethers by intramolecular aryl migration. The reaction conditions are mild with a broad substrate scope. Mechanistic insight suggests a sulfonyl‐directed nucleophilic aromatic substitution pathway. Additionally, the product ortho‐iodo diaryl ethers serve as versatile synthons as demonstrated with several coupling reactions. Furthermore, a useful thyroxine analogue
Synthesis of Chiroptical Molecular Switches by Pd-Catalyzed Domino Reactions
作者:Lutz F. Tietze、Alexander Düfert、Florian Lotz、Lars Sölter、Kawon Oum、Thomas Lenzer、Tobias Beck、Regine Herbst-Irmer
DOI:10.1021/ja906260x
日期:2009.12.16
New photochromic switches based on helical alkenes can quickly and efficiently be accessed by Pd-catalyzed domino reactions using a modular approach; this allows a wide variability in product formation with the advantages of a convergent synthetic route. The alkenes have been synthesized in excellent enantioselectivity and their switching properties assessed by stimulation with nanosecond laser pulses
The effect of ligandpolarization on the formation of stronglyluminescentlanthanidecomplexes with asymmetric structures is described for the first time. The lanthanidecomplexes are composed of EuIII ions, three hexafluoroacetylacetonate (hfa) ligands, and two monodentate phosphine oxide ligands, namely, triphenylphosphine oxide (TPPO), p-tolyldiphenylphosphine oxide (TPPO-Me), tri-p-tolylphosphine