"What is the difference between pyrethroid synthesis and carboxylic acid synthesis?"
From a scientific standpoint there is no difference at all. However some people feel that natural products, that is products found naturally made by nature, are somehow safer. Of course this is nonsense. The most acutely toxic chemical compound known is made by bacteria. On testing nature made chemicals about 1/3 of them prove to be carcinogens while when testing chemicals only made in test tubes about 1/3 of them are carcinogens. People worry themselves sick over tiny amounts of tetrachloro dioxin produced artificially in some chemical reactions and think nothing at all is wrong with the larger amounts of tetrachloro dioxin produced every single year in forest fires and by people burning wood for various reasons.
Dick
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