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Producers of Carotenoid Standards
New Colours for Carotenoids – Synthesis of Pyran Polyenes
In memory of Professor Dr. Hans-Dieter Martin
A new type of carotenoid has been synthesized with a 2H-pyran ring placed in the polyene chain. This compound was successively elongated by Wittig reactions. The pyran-carotenoids obtained show a significant increased λmax compared with carotenoids lacking the pyran ring. A further remarkable bathochromic shift was observed upon protonation to pyranium-carotenoids. The pyranium ring is the distinctive feature of anthocyanidin dyes and has now become an internal part of carotenoids. Eur. J. Chem. 2010, 435 – 439.
http://www3.interscience.wiley.com/cgi-bin/fulltext/123209416/PDFSTART
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Upcoming Conferences
The 2014 international Symposium on Carotenoids will be held in Park City Resort, Salt Lake City, Utah, USA.
This Symposium will be hosted and organized by:
Professor Paul S. Bernstein, M.D., Ph.D., Department of Ophthalmology and Visual Sciences, Moran Eye Center, University of Utah, 65 Mario Capecchi Drive, Salt Lake City, Utah, USA 84132
Tel: 801-581-6078, Fax: 801-581-3357, e-mail: paul.bernstein@hsc.utah.edu