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Title
Japanese: 
English:Synthesis and Reactivity of Cyclic Borane‐Amidine Conjugated Molecules Formed by Direct 1,2‐Carboboration of Carbodiimides with 9‐Borafluorenes 
Author
Japanese: 菓子田 惇輝, 庄子 良晃, 福島 孝典.  
English: J. Kashida, Y. Shoji, T. Fukushima.  
Language English 
Journal/Book name
Japanese: 
English:Chemistry - An Asian Journal 
Volume, Number, Page Volume 14    Issue 10    Page 1879–1885
Published date Feb. 4, 2019 
Publisher
Japanese: 
English: 
Conference name
Japanese: 
English: 
Conference site
Japanese: 
English: 
Official URL https://onlinelibrary.wiley.com/doi/10.1002/asia.201900047
 
DOI https://doi.org/10.1002/asia.201900047
Abstract Efficient 1,2‐carboboration reactions to the C=N bond of carbodiimides with 9‐borafluorenes, which give rise to cyclic borane‐amidine conjugates with a seven‐membered BNC5 ring, are reported. The resulting cyclic borane‐amidine conjugates can be hydrolyzed into an acyclic bifunctional biaryl compound carrying both boronic acid and amidine groups, rendering the utility of the two‐step protocol for the synthesis of multi‐functionalized molecular systems with a potential as a supramolecular building block. Furthermore, the conjugated structure of the cyclic boron‐amidine compounds can be changed upon alkylation of the boron atom that increases the coordination number of boron. The combination of Lewis acid (borane) and conjugated base (amidine) provides rich structural diversity of heteroatom‐containing π‐conjugated systems.

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