Alkylidenecyclobutanes. Part II. The oxidation of benzylidenecyclobutane and of bis-(p-methoxyphenyl)methylenecyclobutane
作者:S. H. Graham、A. J. S. Williams
DOI:10.1039/j39660000655
日期:——
The oxidation of benzylidenecyclobutane gives rise to both rearranged and unrearranged products. The differences observed in the tendencies of alkylidenecyclobutanes and of cyclobutylmethanols to rearrange in the course of oxidations (or dehydrations) is ascribed in part to a steric effect.
Base-Promoted/Gold-Catalyzed Intramolecular Highly Selective and Controllable Detosylative Cyclization
作者:Chenghao Zhu、Lin Qiu、Guangyang Xu、Jian Li、Jiangtao Sun
DOI:10.1002/chem.201502073
日期:2015.9.7
controllable and synthetically useful base‐promoted intramolecular detosylative cyclization of bis‐N‐tosylhydrazones has been achieved, affording N‐containing heterocycles and cyclic olefins under transition‐metal‐free or gold‐catalyzed procedures, respectively. Moreover, an effective and practical metal‐free or gold‐catalyzed approach to synthesize polycyclic aromatic compounds is also reported.