Abstract m-Mentha-3 (8), 6-diene (&sequals n01; isosylveterpinolene; 5), which has not been found in nature before, was shown by GC/MS analysis and co-injection with a synthetic sample to be present to the extent of 0.12–0.17% in black and green pepper oil. The synthetic reference 5 was prepared by deconjugation of 3-methylcyclohex-2-en-1-one (1), subsequent alkylation with lithium 2-lithio-2-methylpropanoate, and decarboxylative ...
