Natural pigments detailed experiments

The last two relationships between electroorganic chemistry and natural products, biogenetic reasoning and new chemistry, will be considered in more detail. Emphasis will be placed on natural materials from plants, namely the so-called secondary plant metabolites (alkaloids, steroids, pigments, terpenes, etc.). Furthermore, we will be concerned only with those reactions from which products have been isolated and identified. The electrochemistry of such primary metabolites as purines, pyrimidines, flavins, porphyrins, etc. has been dealt with by Dryhurst ( ), but the work has been centered more on mechanistic analysis than preparative experiments. 

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