科研之友
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摘要
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 lambda(max) 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 all internal part of carotenoids.
- 出版日期2010-1
