Cadinane, Cyclosesquifenchane, Cyclosativane, Picrotoxane

New cadinane sesquiterpenoids include isokhusinoloxide (192) and raimondal (193). A number of timbers undergo a colour change on exposure to daylight. [Pg.29]

Takahashi, T. Haneishi, and M. Arai, J. Antibiotics, 1980, 33, 525. Qinghaosu Research Group, Sci. Sinica, 1980, 23, 380. [Pg.30]

A short synthesis of calamenene (208) has been achieved by cyclodehydration of the tertiary alcohol (207) with phosphorus pentoxide. The mechanism of this reaction probably involves a carbonium ion re-organization followed by an intramolecular Friedel-Crafts alkylation. In an independent study Wender and [Pg.31]

Hubbs have confirmed the result obtained last year (Vol. 10, p. 29) that the piperitone photo-adduct (209) undergoes a thermal rearrangement to produce [Pg.31]

TosMIC-KOBu viii, H2O2-OH- ix, aq. NBS x, Zn-HOAc xi, (COCOj xii, LiAKOBuOjH xiii, MsCl-py xiv, MeNH2 xv, ClCOCHjCClj-py xvi, MCPBA xvii, [Pg.34]

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