CuSO<sub>4</sub>-Catalyzed dual annulation to synthesize O, S or N-containing tetracyclic heteroacenes
作者:Xiang-Huan Shan、Bo Yang、Jian-Ping Qu、Yan-Biao Kang
DOI:10.1039/d0cc01172j
日期:——
In this work, CuSO4 is utilized as a practical redox catalyst for tandem dual annulation in the synthesis of indole-fused tetracyclic heteroacenes, which are important skeletons in both medicinal chemistry and materials chemistry.
A Parham cyclization approach to diaryl-fused seven-membered ring heterocyclic ketones
作者:John Farrokh、Catherine Campos、David A. Hunt
DOI:10.1016/j.tetlet.2015.07.043
日期:2015.9
described. This work describes a novel synthesis route to diaryl-fused seven membered heterocyclic ketones through the generation of functionalized aryllithiums by bromine–lithium exchange, followed by intramolecular cyclization onto an electrophilic nitrile functional group. The resulting N-lithioimine can then be hydrolyzed to the desired ketone, generally in good yields. The order of addition of