The major studies of my research group in the University of Tokyo (1965–1980) and Hiroshima University (1980–2000) and some related research (2000–2010) are outlined briefly. The following themes are included mostly in chronological order: (1) phosphoranes and nitrosoimines, (2) synthetic work based on heteroaromatic cations and activation of imines, (3) bond switching at hypervalent sulfurane (10-S-3): energy of a hypervalent bond, (4) formation of the hypervalent bond, (5) edge inversion of antimony(III) and bismuth(III) compounds, (6) apicophilicity, pseudorotation, and ligand coupling, (7) freezing pseudorotation of phosphoranes and its effect, (8) hypervalent ate complexes of antimony and bismuth and their transition metal complexes, (9) hypervalent organotellurium compounds, (10) porphyrins of group 15 elements (phosphorus, arsenic, and antimony), and (11) synthesis and structure of hypervalent carbon species (10-C-5 and 12-C-6). © 2011 Wiley Periodicals, Inc. Heteroatom Chem 22:207–274, 2011; View this article online at wileyonlinelibrary.com. DOI 10.1002/hc.20726

https://www.onlinelibrary.wiley.com/doi/pdf/10.1002/hc.20726

Studies on hypervalent compounds and synthetic work using heteroaromatic cations

Cycloadditions and reactions of oxa-aromatics with nucleophiles

Palladium(0)-catalyzed insertion/annulation sequence between aryl silylethynyl ethers and internal alkynes was found to proceed through activation of ortho-C–H bonds assisted by alkynoxy groups and...

H. Iwasaki

Papers

Reaction of 1-benzopyrylium salts with trialkyl phosphite: formation of 2,4-disubstituted 1-benzopyran derivatives

Reaction of 1-Benzopyrylium Salts with Trialkyl Phosphite: Formation of 2,4-Disubstituted 1-Benzopyran Derivatives.