A new synthesis of pentalenene using a novel tandem cyclisation involving ketene radical intermediates

Chemical Composition of the Essential Oils of Serbian Wild-Growing Artemisia absinthium and Artemisia vulgaris

“…It is reasonable to presume that bornyl 3-methylbutanoate (8.4%) would have comparable influence on microbial growth. Compounds with triquinane carbon skeletons, related to those identified in A. Vulgaris root oil, represented in Figure 5 (15, 16, 18, 20, 21, and 22), are reported to be biologically important sesquiterpene antibiotics (41). Considering all of these facts, it would be interesting to investigate the antimicrobial activities of the pure terpenoids found in AvR oil, since possible antagonism and/or synergism of the oil constituents can be expected.…”

Fenestranes in Synthesis: Unique and Highly Inspiring Scaffolds

“…[29] They can be grouped into four subcategories, depending on the positions of the substituents: isocomanes, [30,31] silphinanes, [32] silphiperfolanes, [33] and pentalenanes. [34] A member of the diterpenoid family, aflavinine (5), which was isolated from Aspergillus flavus, has a [6.6.6]fenestrane scaffold ( Figure 13). [35] Later, the sesquiterpene 6 with a [4.5.6]fenestrane scaffold was isolated from the red algae Laurencia obtusa, and was shown to have a slight cytotoxic activity toward a series of cancer cell lines.…”

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“…Eight of these compounds were the first natural nitrate esters isolated as natural compounds. 184 New syntheses of pentalenene 185 and other angular triquinanes 186 have been accomplished.…”