Affiliation:
1. Department of Chemistry, University of Calgary, 2500 University Drive NW, Calgary, AB T2N 1N4, Canada.
Abstract
Treatment of a precursor to the chelating Lewis acid 2,2′-diborabiphenyl with 2,6-bisalkynyl-substituted pyridazines, leads to elimination of 2 equiv. of ClSiMe3; subsequent treatment of the mixture with PtCl2 catalyzes the cyclization of observable intermediates to the title 5b,7b-diaza-3b,9b-diborabenzo[ghi]perylene compounds in low isolated yields. The compounds were characterized by NMR and UV–vis spectroscopies, and in one case, by X-ray crystallography. NICS(1) computations indicate that the inner ring is less aromatic than the outer rings.
Publisher
Canadian Science Publishing
Subject
Organic Chemistry,General Chemistry,Catalysis
Cited by
34 articles.
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