Jan Van Alphen

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Sponges frequently produce toxic secondary metabolites, especially in tropical coral reefs. These metabolites are thought to have evolved as a chemically mediated defence mechanism and are highly effective against potential predators (Proksch 1994). Nudibranchs of the family Phyllidiidae feed on sponges of the order Halichondrida and exploit this(More)
In this paper the synthesis of curcumin and curcumin derivatives is realised, based on the condensation of benzaldehydes substituted by acetyl acetone. The synthesis way is described and the obtained products are characterised in terms of substituted benzaldehydes, colour, melting point and elemental composition.
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