Online article for Non-subscribers

Pay per view

Heterocycles has a pay-per-view service for Non-subscribers.
You will be able to directly purchase the full text article through PayPal.
Your purchased Paper can be downloaded after the payment is completed.
An e-mail will be sent the URL to download the paper.
If you have any questions, please contact: purchase@heterocycles.com

Price: ¥ 4,320 (Yen only)
Period: This Article can be accessed for 7 days.

Communication | Special issue | Vol 74, No. 1, 2007, pp.219-223
Published online, 6th November, 2007
DOI: 10.3987/COM-07-S(W)61
Formation of Hetero-Boroxines: Dynamic Combinatorial Libraries Generated through Trimerization of Pairs of Arylboronic Acids

Yuji Tokunaga,* Hiroki Ueno, and Youji Shimomura

*Department of Materials Science and Engineering, Faculty of Engineering, Fukui University, Bunkyo, Fukui 910-8507, Japan

Abstract

Condensation of pairs of arylboronic acids provided homo- and hetero-boroxines in solution as evidenced from NMR spectra, and those boroxines were detected in the gas phase by GC-MS spectrometry. Equilibrium constants for the formation of these boroxines in solution were obtained through integration of pertinent signals in the NMR spectra of the mixtures of boronic acids.