Abstract
Abstract(E)‐Non‐3‐ene‐2,5‐dione (5) the main component isolated from the volatile compounds derived from the cephalic secretion of workers of Trigona tataira, was conveniently prepared by nitroaldol reaction between pentanal 1 and 1‐nitrobutan‐3‐ol (rac‐2) catalyzed by Amberlyst A‐21. The resulting β‐nitro alcohol rac‐3 was oxidized to the α‐nitro ketones 4, which via elimination of nitrous acid (Et3N), afforded the enedione 5 in good yield.
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