Synthesis and Spectroscopic Studies of Expanded Planar Dehydrotribenzo[n]annulenes Containing One or Two Isolated Alkene Units

✍ Scribed by W. Brad Wan; Ryan C. Chiechi; Timothy J. R. Weakley; Michael M. Haley

• Publisher: John Wiley and Sons
• Year: 2001
• Tongue: English
• Weight: 357 KB
• Volume: 2001
• Category: Article
• ISSN: 1434-193X
• DOI: 10.1002/1099-0690(200109)2001:18<3485::aid-ejoc3485>3.0.co;2-i

✦ Synopsis

Dehydrobenzoannulene derivatives 5-7 containing isolated alkene linkages were synthesized by combining an in-situ Pd/Cu-mediated cross-coupling with an intramolecular cyclization strategy. 1 H NMR studies of these macrocycles and comparison with related systems verify that highly alkynyl-