Streamlined Synthesis of Polycyclic Conjugated Hydrocarbons Containing Cyclobutadienoids via C–H Activated Annulation and Aromatization
作者:Zexin Jin、Yew Chin Teo、Nicolo G. Zulaybar、Matthew D. Smith、Yan Xia
DOI:10.1021/jacs.6b12888
日期:2017.2.8
cyclobutadienoid (CBD) with benzenoid creates intriguing alternating antiaromatic and aromatic conjugation. Synthetic accessibility of such molecules, however, has been challenging and limited in scope. We report a modular and streamlined syntheticstrategy to access a large variety of polycyclic conjugated hydrocarbons with fused CBD. Synthesis was achieved through efficient palladium-catalyzed C-H activated
A simple protocol for hydrodebromination and ‐deiodination of halo(hetero)arenes was enabled by sodium hydride (NaH) in the presence of lithium iodide (LiI). Mechanistic studies showed that an unusual concerted nucleophilic aromatic substitution operates in the present process.