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Title
Japanese: 
English:Bringing out the potential of organoboron compounds by designing the chemical bonds and spaces around boron 
Author
Japanese: 庄子 良晃, 菓子田 惇輝, 福島 孝典.  
English: Y. Shoji, J. Kashida, T. Fukushima.  
Language English 
Journal/Book name
Japanese: 
English:Chemical Communications 
Volume, Number, Page Vol. 58    Issue 28    Page 4420–4434
Published date Mar. 4, 2022 
Publisher
Japanese: 
English: 
Conference name
Japanese: 
English: 
Conference site
Japanese: 
English: 
Official URL https://pubs.rsc.org/en/content/articlelanding/2022/cc/d2cc00653g
 
DOI https://doi.org/10.1039/D2CC00653G
Abstract Since the structures, reactivity and properties of organoboron compounds stem from the electron deficiency and low electronegativity of boron, the design of the chemical bonds attached to boron as well as the space provided by substituents around boron leads to particular reactivity and functions of organoboron compounds. Based on the concept of vacant boron p-orbital engineering in combination with peripheral space design for boron, we have developed new organoboron compounds, which exhibit exotic reactivity and properties and boron-mediated organic transformations capable of constructing large π-conjugated systems. Here we describe our recent study by focusing on three topics: (i) the synthesis and its derivatization, small-molecule activation and application to materials science of a two-coordinate boron cation (borinium ion), (ii) a 9-borafluorene-mediated benzannulation reaction of alkyne derivatives and (iii) BN-substituted molecules featuring a 4nπ heterocycle exhibiting unique electronic and emission properties. The molecules and reactions appearing in this article are unprecedented, yet feature very simple systems, and therefore clearly demonstrate intrinsic and new potential of organoboron compounds.

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