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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 16th International Symposium on Carotenoids will be held in July 17-22, 2011 in the World Heritage city of Krakow, Poland. Professor Kazimierz Strzalka at the Department of Biochemistry, Biophysics and Biotechnology, Jagiellonian University will be hosting this Symposium.
The next Conference on Food Pigments will be held in Budapest, 20-24 June, 2010.
For more information click to visit the conference website here:
Macular Carotenoids & AMD, 2011
A conference for macular carotenoid researchers, exploring up-to-date and evidence-based hypotheses and the supporting research data into the role of the macular carotenoids in age-related macular degeneration (AMD). Downing College, University of Cambridge, UK 12 – 15 July 2011. Click to visit the conference website: http://suzy-howes.co.uk/macularcarotenoids/index.html