Compounds from Chorismic Acid

Various other aromatic compounds are obtained from the intermediate chorismic acid in Figure 8.1, including the other 'essential' amino-acid tryptophan, which is made only by plants and micro-organisms. These routes are shown in Figure 8.5. Attack of ammonia on chorismic acid gives (Figure 8.5, mechanism a) after further steps, anthranilic acid, while addition of ribose phosphate to anthranilic acid gives after several

Figure 8.4 Some simple aromatic compounds found in abdominal glands of adult male leaf-footed beetles, probably recognition pheromones. 2-Nitroethenylbenzene (nitrostyrene) is a defensive compound from a millipede

Figure 8.4 Some simple aromatic compounds found in abdominal glands of adult male leaf-footed beetles, probably recognition pheromones. 2-Nitroethenylbenzene (nitrostyrene) is a defensive compound from a millipede guaiacol vanillin och3 syringaldehyde cinnamyl alcohol

2-nitro-1 (£)-ethenylbenzene guaiacol vanillin och3 syringaldehyde cinnamyl alcohol

2-nitro-1 (£)-ethenylbenzene

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