base/solvent controlleddivergent synthesis for the construction of polycyclic hydrocarbons has been developed. In this process, norbornene through a reagent role leads to the synthesis of norbornane-fused dihydrophenanthrenes, which are essential due to their biological activities. Amazingly, by switching solvent and base, the role of norbornene becomes limited to a mediator/catalyst; therefore, it
efficient one-potthree-component palladium-catalyzed domino reaction of aryl iodide, 2-bromophenylboronic acid, and norbornadiene to produce phenanthrenes has been developed. Norbornadiene serves both as the activator of ortho-C–H bond and the source of ethylene via a retro-Diels–Alder reaction. The method features inexpensive and readily available substrates, a broad range of functional groups, and
A ligand-free palladium-catalyzed and norbornadiene-mediated annulation reaction of iodoarenes with methyl 2-haloarenecarboxylates is reported. The sequentially accomplished reaction comprises intermolecular C–H arylation, followed by intramolecular decarboxylative annulation, affording various valuable phenanthrenes. This reaction protocol could be expanded to triphenylene syntheses whereby norbornene
报道了碘芳烃与 2-卤代芳烃甲酸甲酯的无配体钯催化和降冰片二烯介导的环化反应。随后完成的反应包括分子间C-H芳基化,然后是分子内脱羧环化,得到各种有价值的菲。该反应方案可以扩展到苯并菲的合成,其中降冰片烯是助催化剂。有趣的是,甲酯的脱羧是通过溶剂介导的 C Me -O 键断裂完成的。
106. Synthesis of alkylphenanthrenes. Part VI. Attempts to synthesise the hydrocarbon “C<sub>16</sub>H<sub>14</sub>'” derived from strophanthidin
作者:Robert Downs Haworth、Cecil Robert Mavin、George Sheldrick
DOI:10.1039/jr9340000454
日期:——
Methylphenanthrenecarbaldehydes by Selective Cerium(IV) Oxidation of Dimethylphenanthrenes.
作者:Leiv K. Sydnes、Ivan C. Burkow、Mona Kvivesen、Leif J. Sæthre、Markku Ahlgrén、Jouni Pursiainen、Hong-Gen Wang、Xin-Kan Yao、Hong-Gen Wang、J. -P. Tuchagues、Mattias Ögren