Ring Contraction of a Pinacolatoboryl Group To Form a 1,2-Oxaboretane Ring: Reaction of Unsymmetrical Diborane(4) with 2,6-Dimethylphenyl Isocyanide

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• 作者：Yuhei Katsuma ; Hiroki Asakawa ; Ka-Ho Lee ; Zhenyang Lin ; Makoto Yamashita
• 刊名：Organometallics
• 出版年：2016
• 出版时间：August 8, 2016
• 年：2016
• 卷：35
• 期：15
• 页码：2563-2566
• 全文大小：377K
• 年卷期：0
• ISSN：1520-6041

文摘

An unsymmetrical diborane(4), pinB-BMes₂, reacted with 2,6-dimethylphenyl isocyanide to give a spirocyclic 1,2-oxaboretane or isocyanide-coordinated boraalkene. The former product formed via ring contraction of the pinacolatoboryl group. DFT calculations revealed the ring contraction proceeded via a carbocationic intermediate. This new degradation pathway from the Bpin group would provide important information in Bpin-related chemistry.