- Biomimetic synthesis of nudicaulins i and II, yellow pigments from the Iceland poppy: Papaver nudicaule
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Indole and the anthocyanin orientalin proceed through a unique cascade sequence that leads to nudicaulins I and II in 92% yield. This biomimetic synthesis confirms the biosynthesis proposal for these structurally unprecedented flavoalkaloids that play a key role in the colour range displayed by the Iceland poppy.
- Devlin, Rory,Sperry, Jonathan
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supporting information
p. 13594 - 13597
(2019/11/14)
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- Synthesis of [4-14C]-pelargonidin chloride and [4- 14C]-delphinidin chloride
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The synthesis of [4-14C]-pelargonidin chloride and [4- 14C]-delphinidin chloride via [formyl-14C]-2-(benzoyloxy)- 4,6-dihydroxybenzaldehyde, ω,4-diacetoxyacetophenone and ω,3,4,5-tetraacetoxyacetophenone is described. The first step comprised labelling of the carbonyl group of 2-(benzoyloxy)-4,6-dihydroxybenzaldehyde, verifying that the coupling with ω,4-diacetoxyacetophenone or ω,3,4,5-tetraacetoxyacetophenone under hydrogen chloride atmosphere resulted in the formation of [4-14C] labelled anthocyanidins. Copyright
- Kraus, Michael,Biskup, Ellen,Richling, Elke,Schreier, Peter
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p. 1151 - 1162
(2007/10/03)
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