Ch3c00h

frontalin drawn similarly for comparison frontalin drawn similarly for comparison

Figure 6.10 The formation of exo-brevicomin ( not a terpene). The retention of labelled oxygen from the ketone to brevicomin indicated the epoxide was not opened first. The stereochemistry is more complex than shown here

Figure 6.10 The formation of exo-brevicomin ( not a terpene). The retention of labelled oxygen from the ketone to brevicomin indicated the epoxide was not opened first. The stereochemistry is more complex than shown here details are given by Vanderwel and Oehlschlager, Journal of the American Chemical Society, 1992,114, 5081.

The Nasanov gland in the abdomen of honeybees provides an attractant pheromone for marking food sources and the nest. The gland contains geraniol which is enzymically oxidized on release so that the emitted pheromone contains geraniol, geranial, neral, geranic and nerolic acids. Citronellol (Figure 6.4) is a sex attractant produced by male spider mites. The cheese or house mite Tyrophagusputrescentiae (Figure 6.11) normally form clusters, but if one of them is crushed, the formate ester of nerol (Figure 6.7) is released and they disperse. Many other oxygenated compounds, clearly monoterpene derivatives, are known from insects. Some are pheromones, for others their purpose is not always known.

0 0

Post a comment