First Examples of P–Chalcogen–B Phenalenes

  • Author: Hayley Charville
  • Published Date: 14 March 2014
  • Source / Publisher: Chemistry – A European Journal/Wiley-VCH
  • Copyright: Wiley-VCH Verlag GmbH & Co. KGaA, Weinheim
thumbnail image: First Examples of P–Chalcogen–B Phenalenes

Related Societies

The chemistry of phosphine–boranes (R3P–BR3) bearing a P–B coordinate bond has attracted a lot of attention in recent years, especially from the viewpoint of frustrated Lewis pairs. Of particular interest are phosphine–boranes that contain a rigid linker, such as a 1,8-naphthalene core. This rigid linker is useful for the investigation of the steric nature of P–B coordinate bonds.

Takahire Sasamori, Norihiro Tokitoh, Kyoto University, Japan, and colleagues have reported the synthesis of 1-phospha-2-boraacenaphthene derivatives by the reduction of diarylboryl-8-dichlorophosphinonaphthalene compounds with elemental magnesium. Chalcogenation reactions of these stable phosphine–boranes with elemental sulfur or selenium afforded unique heterocycles, possessing a P–Ch–B (Ch = chalcogen) moiety tethered to the naphthalene skeleton. These compounds are the first examples of heterocycles with phosphorus, boron, and chalcogen atoms in a phenalene backbone. Spectroscopic and X-ray analyses of these derivatives revealed some interesting behavior. In particular, some examples display a unique dynamic behavior in solution, such as two selenium atoms undergoing facile exchange with each other via an intermediate bearing a P(μ-Se2)B four-membered ring system.

The researchers hope that this study will be useful for the synthesis of unique heterocyclic systems by utilizing a P–B bond.

Article Views: 2995

Sign in Area

Please sign in below

Additional Sign In options

Please note that to comment on an article you must be registered and logged in.
Registration is for free, you may already be registered to receive, e.g., the newsletter. When you register on this website, please ensure you view our terms and conditions. All comments are subject to moderation.

Article Comments - To add a comment please sign in

If you would like to reuse any content, in print or online, from, please contact us first for permission and consult our permisson guidance prior to making your request

Follow on Facebook Follow on Twitter Follow on YouTube Follow on LinkedIn Follow on Instagram RSS Sign up for newsletters

Magazine of Chemistry Europe (16 European Chemical Societies) published by Wiley-VCH